Appendix C. MySQL Change History

Table of Contents

C.1. Changes in release 6.0.x (Development)
C.1.1. Changes in MySQL 6.0.5 (Not yet released)
C.1.2. Changes in MySQL 6.0.4 (Not yet released)
C.1.3. Changes in MySQL 6.0.3 (16 November 2007)
C.1.4. Changes in MySQL 6.0.2 (04 September 2007)
C.1.5. Changes in MySQL 6.0.1 (Not released)
C.1.6. Changes in MySQL 6.0.0 (30 April 2007)
C.2. Changes in release 5.2.x (Development)
C.2.1. Changes in MySQL 5.2.5 (08 August 2007: Alpha)
C.2.2. Changes in MySQL 5.2.4 (Not released)
C.2.3. Changes in MySQL 5.2.3 (15 February 2007)
C.2.4. Changes in MySQL 5.2.2 (Not released)
C.2.5. Changes in MySQL 5.2.1 (Not released)
C.3. MySQL Connector/ODBC (MyODBC) Change History
C.3.1. Changes in MySQL Connector/ODBC 5.1.2 (Not yet released)
C.3.2. Changes in MySQL Connector/ODBC 5.1.1 (13 December 2007)
C.3.3. Changes in MySQL Connector/ODBC 5.1.0 (10 September 2007)
C.3.4. Changes in MySQL Connector/ODBC 5.0.12 (Never released)
C.3.5. Changes in MySQL Connector/ODBC 5.0.11 (31 January 2007)
C.3.6. Changes in MySQL Connector/ODBC 5.0.10 (14 December 2006)
C.3.7. Changes in MySQL Connector/ODBC 5.0.9 (22 November 2006)
C.3.8. Changes in MySQL Connector/ODBC 5.0.8 (17 November 2006)
C.3.9. Changes in MySQL Connector/ODBC 5.0.7 (08 November 2006)
C.3.10. Changes in MySQL Connector/ODBC 5.0.6 (03 November 2006)
C.3.11. Changes in MySQL Connector/ODBC 5.0.5 (17 October 2006)
C.3.12. Changes in Connector/ODBC 5.0.3 (Connector/ODBC 5.0 Alpha 3) (20 June 2006)
C.3.13. Changes in Connector/ODBC 5.0.2 (Never released)
C.3.14. Changes in Connector/ODBC 5.0.1 (Connector/ODBC 5.0 Alpha 2) (05 June 2006)
C.3.15. Changes in MySQL Connector/ODBC 3.51.23 (Not yet released)
C.3.16. Changes in MySQL Connector/ODBC 3.51.22 (13 November 2007)
C.3.17. Changes in MySQL Connector/ODBC 3.51.21 (08 October 2007)
C.3.18. Changes in MySQL Connector/ODBC 3.51.20 (10 September 2007)
C.3.19. Changes in MySQL Connector/ODBC 3.51.19 (10 August 2007)
C.3.20. Changes in MySQL Connector/ODBC 3.51.18 (08 August 2007)
C.3.21. Changes in MySQL Connector/ODBC 3.51.17 (14 July 2007)
C.3.22. Changes in MySQL Connector/ODBC 3.51.16 (14 June 2007)
C.3.23. Changes in MySQL Connector/ODBC 3.51.15 (7 May 2007)
C.3.24. Changes in MySQL Connector/ODBC 3.51.14 (08 March 2007)
C.3.25. Changes in MySQL Connector/ODBC 3.51.13 (Never released)
C.3.26. Changes in MySQL Connector/ODBC 3.51.12 (11 Febrauary 2005)
C.3.27. Changes in MySQL Connector/ODBC 3.51.11 (28 January 2005)
C.4. MySQL Connector/NET Change History
C.4.1. Changes in MySQL Connector/NET 5.2.0 (Not yet released)
C.4.2. Changes in MySQL Connector/NET 5.1.4 (20 November 2007)
C.4.3. Changes in MySQL Connector/NET 5.1.3 (21 September 2007)
C.4.4. Changes in MySQL Connector/NET 5.1.2 (18 June 2007)
C.4.5. Changes in MySQL Connector/NET 5.1.1 (23 May 2007)
C.4.6. Changes in MySQL Connector/NET 5.1.0 (01 May 2007)
C.4.7. Changes in MySQL Connector/NET 5.0.9 (Not yet released)
C.4.8. Changes in MySQL Connector/NET 5.0.8 (21 August 2007)
C.4.9. Changes in MySQL Connector/NET 5.0.7 (18 May 2007)
C.4.10. Changes in MySQL Connector/NET 5.0.6 (22 March 2007)
C.4.11. Changes in MySQL Connector/NET 5.0.5 (07 March 2007)
C.4.12. Changes in MySQL Connector/NET 5.0.4 (Not released)
C.4.13. Changes in MySQL Connector/NET 5.0.3 (05 January 2007)
C.4.14. Changes in MySQL Connector/NET 5.0.2 (06 November 2006)
C.4.15. Changes in MySQL Connector/NET 5.0.1 (01 October 2006)
C.4.16. Changes in MySQL Connector/NET 5.0.0 (08 August 2006)
C.4.17. Changes in MySQL Connector/NET 1.0.11 (Not yet released)
C.4.18. Changes in MySQL Connector/NET 1.0.10 (24 August 2007)
C.4.19. Changes in MySQL Connector/NET 1.0.9 (02 February 2007)
C.4.20. Changes in MySQL Connector/NET 1.0.8 (20 October 2006)
C.4.21. Changes in MySQL Connector/NET 1.0.7 (21 November 2005)
C.4.22. Changes in MySQL Connector/NET 1.0.6 (03 October 2005)
C.4.23. Changes in MySQL Connector/NET 1.0.5 (29 August 2005)
C.4.24. Changes in MySQL Connector/NET 1.0.4 (20 January 2005)
C.4.25. Changes in MySQL Connector/NET 1.0.3 (12 October 2004)
C.4.26. Changes in MySQL Connector/NET 1.0.2 (15 November 2004)
C.4.27. Changes in MySQL Connector/NET 1.0.1 (27 October 2004)
C.4.28. Changes in MySQL Connector/NET 1.0.0 (01 September 2004)
C.4.29. Changes in MySQL Connector/NET Version 0.9.0 (30 August 2004)
C.4.30. Changes in MySQL Connector/NET Version 0.76
C.4.31. Changes in MySQL Connector/NET Version 0.75
C.4.32. Changes in MySQL Connector/NET Version 0.74
C.4.33. Changes in MySQL Connector/NET Version 0.71
C.4.34. Changes in MySQL Connector/NET Version 0.70
C.4.35. Changes in MySQL Connector/NET Version 0.68
C.4.36. Changes in MySQL Connector/NET Version 0.65
C.4.37. Changes in MySQL Connector/NET Version 0.60
C.4.38. Changes in MySQL Connector/NET Version 0.50
C.5. MySQL Visual Studio Plugin Change History
C.5.1. Changes in MySQL Visual Studio Plugin 1.0.3 (Not yet released)
C.5.2. Changes in MySQL Visual Studio Plugin 1.0.2 (Not yet released)
C.5.3. Changes in MySQL Visual Studio Plugin 1.0.1 (4 October 2006)
C.5.4. Changes in MySQL Visual Studio Plugin 1.0.0 (4 October 2006)
C.6. MySQL Connector/J Change History
C.6.1. Changes in MySQL Connector/J 5.1.x
C.6.2. Changes in MySQL Connector/J 5.0.x
C.6.3. Changes in MySQL Connector/J 3.1.x
C.6.4. Changes in MySQL Connector/J 3.0.x
C.6.5. Changes in MySQL Connector/J 2.0.x
C.6.6. Changes in MySQL Connector/J 1.2b (04 July 1999)
C.6.7. Changes in MySQL Connector/J 1.2.x and lower
C.7. MySQL Connector/MXJ Change History
C.7.1. Changes in MySQL Connector/MXJ 5.0.6 (04 May 2007)
C.7.2. Changes in MySQL Connector/MXJ 5.0.5 (14 March 2007)
C.7.3. Changes in MySQL Connector/MXJ 5.0.4 (28 January 2007)
C.7.4. Changes in MySQL Connector/MXJ 5.0.3 (24 June 2006)
C.7.5. Changes in MySQL Connector/MXJ 5.0.2 (15 June 2006)
C.7.6. Changes in MySQL Connector/MXJ 5.0.1 (Never released)
C.7.7. Changes in MySQL Connector/MXJ 5.0.0 (09 December 2005)
C.8. MySQL Proxy Change History
C.8.1. Changes in MySQL Proxy 0.6.0 (Not yet released)
C.8.2. Changes in MySQL Proxy 0.5.1 (30 June 2007)
C.8.3. Changes in MySQL Proxy 0.5.0 (19 June 2007)

This appendix lists the changes from version to version in the MySQL source code through the latest version of MySQL 6.0, which is currently MySQL 6.0.5. Starting with MySQL 5.0, we began offering a new version of the Manual for each new series of MySQL releases (5.0, 5.1, and so on). For information about changes in previous release series of the MySQL database software, see the corresponding version of this Manual. For information about legacy versions of the MySQL software through the 4.1 series, see MySQL 3.23, 4.0, 4.1 Reference Manual.

We update this section as we add new features in the 6.0 series, so that everybody can follow the development process.

Note that we tend to update the manual at the same time we make changes to MySQL. If you find a recent version of MySQL listed here that you can't find on our download page (http://dev.mysql.com/downloads/), it means that the version has not yet been released.

The date mentioned with a release version is the date of the last BitKeeper ChangeSet on which the release was based, not the date when the packages were made available. The binaries are usually made available a few days after the date of the tagged ChangeSet, because building and testing all packages takes some time.

The manual included in the source and binary distributions may not be fully accurate when it comes to the release changelog entries, because the integration of the manual happens at build time. For the most up-to-date release changelog, please refer to the online version instead.

C.1. Changes in release 6.0.x (Development)

An overview of which features were added in MySQL 6.0 can be found here: Section 1.5.1, “What's New in MySQL 6.0”.

For a full list of changes, please refer to the changelog sections for each individual 6.0.x release.

C.1.1. Changes in MySQL 6.0.5 (Not yet released)

Functionality added or changed:

  • Incompatible Change: In MySQL 5.1.6, when log tables were implemented, the default log destination for the general query and slow query log was TABLE. This default has been changed to FILE, which is compatible with MySQL 5.0, but incompatible with earlier releases of MySQL 5.1 from 5.1.6 to 5.1.20. If you are upgrading from MySQL 5.0 to this release, no logging option changes should be necessary. However, if you are upgrading from 5.1.6 through 5.1.20 to this release and were using TABLE logging, use the --log-output=TABLE option explicitly to preserve your server's table-logging behavior.

    In MySQL 5.1.x, this bug was addressed twice because it turned out that the default was set in two places, only one of which was fixed the first time. (Bug#29993)

  • The C API contained several undocumented functions that have been removed: mysql_disable_reads_from_master(), mysql_disable_rpl_parse(), mysql_enable_reads_from_master(), mysql_enable_rpl_parse(), mysql_master_query(), mysql_master_send_query(), mysql_reads_from_master_enabled(), mysql_rpl_parse_enabled(), mysql_rpl_probe(), mysql_rpl_query_type(), mysql_set_master(), mysql_slave_query(), and mysql_slave_send_query(). (Bug#31952)

  • The LAST_EXECUTED column of the INFORMATION_SCHEMA.EVENTS table now indicates when the event started executing rather than when it finished executing. As a result, the ENDS column is never less than LAST_EXECUTED. (Bug#29830)

  • The mysql_odbc_escape_string() C API function has been removed. It has multi-byte character escaping issues, doesn't honor the NO_BACKSLASH_ESCAPES SQL mode and is not needed anymore by Connector/ODBC as of 3.51.17. (Bug#29592)

  • Added the SHA2() function, which calculates the SHA-2 family of hash functions (SHA-224, SHA-256, SHA-384, and SHA-512). (Contributed by Bill Karwin) (Bug#13174)

  • The Instance Manager (mysqlmanager) has been discontinued and is no longer provided in MySQL releases.

Bugs fixed:

  • Incompatible Change: Inserting a row with a NULL value for a DATETIME column results in a CSV file that the storage engine cannot read.

    All CSV tables now need to be defined with each column marked as NOT NULL. An error is raised if you try to create a CSV table with columns that are not defined with NOT NULL. (Bug#31473, Bug#32817)

  • Important Change: MySQL Cluster: AUTO_INCREMENT columns had the following problems when used in NDB tables:

    • The AUTO_INCREMENT counter was not updated correctly when such a column was updated.

    • AUTO_INCREMENT values were not prefetched beyond statement boundaries.

    • AUTO_INCREMENT values were not handled correctly with INSERT IGNORE statements.

    • After being set, ndb_autoincrement_prefetch_sz showed a value of 1, regardless of the value it had actually been set to.

    As part of this fix, the behavior of ndb_autoincrement_prefetch_sz has changed. Setting this to less than 32 no longer has any effect on prefetching within statements (where IDs are now always obtained in batches of 32 or more), but only between statements. The default value for this variable has also changed, and is now 1. (Bug#25176, Bug#31956, Bug#32055)

  • MySQL Cluster: An improperly reset internal signal was observed as a hang when using events in the NDB API but could result in various errors. (Bug#33206)

  • MySQL Cluster: Incorrectly handled parameters could lead to a crash in the Transaction Coordinator during a node failure, causing other data nodes to fail. (Bug#33168)

  • MySQL Cluster: When using micro-GCPs, if a node failed while preparing for a global checkpoint, the master node would use the wrong GCI. (Bug#32922)

  • MySQL Cluster: Under some conditions, performing an ALTER TABLE on an NDBCLUSTER table failed with a Table is full error, even when only 25% of DataMemory was in use and the result should have been a table using less memory (for example, changing a VARCHAR(100) column to VARCHAR(80)). (Bug#32670)

  • MySQL Cluster: A memory leak occurred if a subscription start request was received by the subscription manager before the node making the request was fully connected to the cluster. (Bug#32652)

  • MySQL Cluster: A local checkpoint could sometimes be started before the previous LCP was restorable from a global checkpoint. (Bug#32519)

  • MySQL Cluster: High numbers of API nodes on a slow or congested network could cause connection negotiation to time out prematurely, leading to the following issues:

    • Excessive retries

    • Excessive CPU usage

    • Partially connected API nodes

    (Bug#32359)

  • MySQL Cluster: When a mysqld acting as a cluster SQL node starts the NDBCLUSTER storage engine, there is a delay during which some necessary data structures cannot be initialized until after it has connected to the cluster, and all MySQL Cluster tables should be opened as read-only. This worked correctly when the NDB binlog thread was running, but when it was not running, Cluster tables were not opened as read-only even when the data structures had not yet been set up. (Bug#32275)

  • MySQL Cluster: The failure of a master node could lead to subsequent failures in local checkpointing. (Bug#32160)

  • MySQL Cluster: In a cluster running in diskless mode and with arbitration disabled, the failure of a data node during an insert operation caused other data node to fail. (Bug#31980)

  • MySQL Cluster: Log event requests to ndb_mgmd could time out, causing it to fail. (Bug#29621)

  • MySQL Cluster: The error message for NDB error code 275 (Out of transaction records for complete phase) was missing. (Bug#29139)

  • MySQL Cluster: There was a short interval during the startup process prior to the beginning of heartbeat detection such that, were an API or management node to reboot or a network failure to occur, data nodes could not detect this, with the result that there could be a lingering connection. (Bug#28445)

  • MySQL Cluster: A restart of the cluster failed when more than 1 REDO phase was in use. (Bug#22696)

  • MySQL Cluster: When inserting a row into an NDB table with a duplicate value for a non-primary unique key, the error issued would reference the wrong key. (Bug#21072)

  • Partitioning: It was possible to partition a table to which a foreign key referred. (Bug#32948)

  • Partitioning: A query of the form SELECT col1 FROM table GROUP BY (SELECT col2 FROM table LIMIT 1); against a partitioned table having a SET column crashed the server. (Bug#32772)

  • Partitioning: SHOW CREATE TABLE misreported the value of AUTO_INCREMENT for partitioned tables using either of the InnoDB or ARCHIVE storage engines. (Bug#32247)

  • Partitioning: Selecting from INFORMATION_SCHEMA.PARTITIONS while partition management statements (for example, ALTER TABLE ... ADD PARTITION) were executing caused the server to crash. (Bug#32178)

  • Partitioning: ORDER BY ... DESC did not always work correctly when selecting from partitioned tables. (Bug#31890)

    See also Bug#31001

  • Partitioning: ALTER TABLE ... COALESCE PARTITION on a table partitioned by [LINEAR] HASH or [LINEAR] KEY caused the server to crash. (Bug#30822)

  • Partitioning: LIKE queries on tables partitioned by KEY could return incomplete results. The problem was observed with the Falcon storage engine, but could affect third-party storage engines as well. (Bug#30480)

    See also Bug#29320, Bug#29493, Bug#30563

  • Partitioning: It was not possible to insert the greatest possible value for a given data type into a partitioned table. For example, consider a table defined as shown here:

    CREATE TABLE t (c BIGINT UNSIGNED)
        PARTITION BY RANGE(c) (
          PARTITION p0 VALUES LESS THAN MAXVALUE
        );
    

    The largest possible value for a BIGINT UNSIGNED column is 18446744073709551615, but the statement INSERT INTO t VALUES (18446744073709551615); would fail, even though the same statement succeeded were t not a partitioned table.

    In other words, MAXVALUE was treated as being equal to the greatest possible value, rather than as a least upper bound. (Bug#29258)

  • Cluster Replication: Memory was mistakenly freed for NdbBlob objects when adding an index while replicating the cluster, which could cause mysqld to crash. (Bug#33142)

    See also Bug#18106

  • Cluster Replication: Under certain conditions, the slave stopped processing relay logs. This resulted in the logs never being cleared and the slave eventually running out of disk space. (Bug#31958)

  • Cluster Replication: When the master mysqld crashed or was restarted, no LOST_EVENTS entry was made in the binlog. (Bug#31484)

    See also Bug#21494

  • The fix for Bug#11230 and Bug#26215 introduced a significant input-parsing slowdown for the mysql client. This has been corrected. (Bug#33057)

  • SHOW EVENTS and selecting from the INFORMATION_SCHEMA.EVENTS table failed if the current database was INFORMATION_SCHEMA. (Bug#32775)

  • Use of the cp932 character set with CAST() in an ORDER BY clause could cause a server crash. (Bug#32726)

  • For FLUSH TABLES WITH READ LOCK, the server failed to properly detect write-locked tables when running with low-priority updates, resulting in a crash or deadlock. (Bug#32528)

  • Sending several KILL QUERY statements to target a connection running SELECT SLEEP() could freeze the server. (Bug#32436)

  • ssl-cipher values in option files were not being read by libmysqlclient. (Bug#32429)

  • If a global read lock acquired with FLUSH TABLES WITH READ LOCK was in effect, executing ALTER TABLE could cause a server crash. (Bug#32395)

  • Assigning a 65,536-byte string to a TEXT column (which can hold a maximum of 65,535 bytes) resulted in truncation without a warning. Now a truncation warning is generated. (Bug#32282)

  • Various test program cleanups were made: 1) mytest and libmysqltest were removed. 2) bug25714 displays an error message when invoked with incorrect arguments or the --help option. 3) mysql_client_test exits cleanly with a proper error status. (Bug#32221)

  • The default grant tables on Windows contained information for host production.mysql.com, which should not be there. (Bug#32219)

  • For comparisons of the form date_col OP datetime_const (where OP is =, <, >, <=, or >=), the comparison is done using DATETIME values, per the fix for Bug#27590. However that fix caused any index on date_col not to be used and compromised performance. Now the index is used again. (Bug#32198)

  • DATETIME arguments specified in numeric form were treated by DATE_ADD() as DATE values. (Bug#32180)

  • When configure was run with --with-libevent, libevent was not linked statically with mysqld, preventing mysqld from being run with a debugger. (Bug#32156)

  • Killing a statement could lead to a race condition in the server. (Bug#32148)

  • With lower_case_table_names set, CREATE TABLE LIKE was treated differently by libmysqld than by the non-embedded server. (Bug#32063)

  • Within a subquery, UNION was handled differently than at the top level, which could result in incorrect results or a server crash. (Bug#32036, Bug#32051)

  • Changing the SQL mode to cause dates with “zero” parts to be considered invalid (such as '1000-00-00') could result in indexed and non-indexed searches returning different results for a column that contained such dates. (Bug#31928)

  • The server used unnecessarily large amounts of memory when user variables were used as an argument to CONCAT() or CONCAT_WS(). (Bug#31898)

  • Using ORDER BY leads to the wrong result when using the ARCHIVE on a table with a BLOB when the table cache is full. The table may also be reported as crashed after the query has completed, even though the table data was intact. (Bug#31833)

  • ucs2 does not work as a client character set, but attempts to use it as such were not rejected. Now character_set_client cannot be set to ucs2. This also affects statements such as SET NAMES and SET CHARACTER SET. (Bug#31615)

  • For a table that had been opened with HANDLER and marked for reopening after being closed with FLUSH TABLES, DROP TABLE did not properly discard the handler. (Bug#31397)

  • The server crashed in the parser when running out of memory. Memory handling in the parser has been improved to gracefully return an error when out-of-memory conditions occur in the parser. (Bug#31153)

  • Improper calculation of CASE expression results could lead to value truncation. (Bug#30782)

  • When casting a string value to an integer, cases where the input string contained a decimal point and was long enough to overrun the unsigned long long type were not handled correctly. The position of the decimal point was not taken into account which resulted in miscalculated numbers and incorrect truncation to appropriate SQL data type limits. (Bug#30453)

  • SHOW VARIABLES did not correctly display the value of the thread_handling system variable. (Bug#28785)

  • Some queries using the NAME_CONST() function failed to return either a result or an error to the client, causing it to hang. This was due to the fact that there was no check to insure that both arguments to this function were constant expressions. (Bug#27545, Bug#32559)

  • With the read_only system variable enabled, CREATE DATABASE and DROP DATABASE were allowed to users who did not have the SUPER privilege. (Bug#27440)

  • Symbolic links on Windows could fail to work. (Bug#26811)

  • mysqld sometimes miscalculated the number of digits required when storing a floating-point number in a CHAR column. This caused the value to be truncated, or (when using a debug build) caused the server to crash. (Bug#26788)

    See also Bug#12860

  • CREATE TABLE LIKE did not work when the source table was an INFORMATION_SCHEMA table. (Bug#25629)

  • If the expected precision of an arithmetic expression exceeded the maximum precision supported by MySQL, the precision of the result was reduced by an unpredictable or arbitrary amount, rather than to the maximum precision. In some cases, exceeding the maximum supported precision could also lead to a crash of the server. (Bug#24907)

  • A CREATE TRIGGER statement could cause a deadlock or server crash if it referred to a table for which a table lock had been acquired with LOCK TABLES. (Bug#23713)

  • The parser treated the INTERVAL() function incorrectly, leading to situations where syntax errors could result depending on which side of an arithmetic operator the function appeared. (Bug#22312)

  • It was possible to execute CREATE TABLE t1 ... SELECT ... FROM t2 with the CREATE privilege for t1 and SELECT privilege for t2, even in the absence of the INSERT privilege for t1. (Bug#20901)

  • Issuing an SQL KILL of the active connection caused an error on Mac OS X. (Bug#19723)

  • The -lmtmalloc library was removed from the output of mysql_config on Solaris, as it caused problems when building DBD::mysql (and possibly other applications) on that platform that tried to use dlopen() to access the client library. (Bug#18322)

C.1.2. Changes in MySQL 6.0.4 (Not yet released)

Functionality added or changed:

  • Important Change: Partitioning: Security Fix: It was possible, by creating a partitioned table using the DATA DIRECTORY and INDEX DIRECTORY options to gain privileges on other tables having the same name as the partitioned table. As a result of this fix, any table-level DATA DIRECTORY or INDEX DIRECTORY options are now ignored for partitioned tables. (Bug#32091, CVE-2007-5970)

    See also Bug#29325, Bug#32111

  • Incompatible Change: The Unicode implementation has been extended to provide support for supplementary characters that lie outside the Basic Multilingual Plane (BMP). Noteworthy features:

    • utf16 and utf32 character sets have been added. These correspond to the UTF-16 and UTF-32 encodings of the Unicode character set, and they both support supplementary characters.

    • The utf8 character set from previous versions of MySQL has been renamed to utf8mb3, to reflect that its encoding uses a maximum of three bytes for multi-byte characters. (Old tables that previously used utf8 will be reported as using utf8mb3 after an in-place upgrade to MySQL 6.0, but otherwise work as before.)

    • The new utf8 character set in MySQL 6.0 is similar to utf8mb3, but its encoding allows up to four bytes per character to enable support for supplementary characters.

    • The ucs2 character set is essentially unchanged except for the inclusion of some newer BMP characters.

    In most respects, upgrading from MySQL 5.1 to 6.0 should present few problems with regard to Unicode usage, although there are some potential areas of incompatibility. Some examples:

    • For the variable-length character data types (VARCHAR and the TEXT types), the maximum length in characters for utf8 columns is less in MySQL 6.0 than previously.

    • For all character data types (CHAR, VARCHAR, and the TEXT types), the maximum number of characters for utf8 columns that can be indexed is less in MySQL 6.0 than previously.

    Consequently, if you want to upgrade tables from the old utf8 (now utf8mb3) to the current utf8, it may be necessary to change some column or index definitions.

    For additional details about the new Unicode character sets and potential incompatibilities, see Section 8.1.8, “Unicode Support”, and Section 8.1.9, “Upgrading from Previous to Current Unicode Support”.

    If you use events, a known issue is that if you upgrade from MySQL 5.1 to 6.0.4, the event scheduler will not work, even after you run mysql_upgrade. (This is an issue only for an upgrade, not for a new installation of MySQL 6.0.4.) To work around this upgrading problem, use these instructions:

    1. In MySQL 5.1, before upgrading, create a dump file containing your mysql.event table:

      shell> mysqldump -uroot -p mysql event > event.sql
      
    2. Stop the server, upgrade to MySQL 6.0, and start the server.

    3. Recreate the mysql.event table using the dump file:

      shell> mysql -uroot -p mysql < event.sql
      
    4. Run mysql_upgrade to upgrade the other system tables in the mysql database:

      shell> mysql_upgrade -uroot -p
      
    5. Restart the server. The event scheduler should run normally.

  • Incompatible Change: Because of a change in the format of the Falcon pages stored within Falcon database files, Falcon databases created in MySQL 6.0.4 (or later) are not compatible with previous releases, and existing Falcon databases are incompatible with MySQL 6.0.4 (and later versions. You should dump Falcon databases using mysqldump before upgrading, and then reload them after the upgrade. For more information, see Section 4.5.4, “mysqldump — A Database Backup Program”.

  • Partitioning: Error messages for partitioning syntax errors have been made more descriptive. (Bug#29368)

  • Replication: Replication of the following now switches to row-based logging in MIXED mode, and generates a warning in STATEMENT mode:

    See Section 5.2.4.3, “Mixed Binary Logging (MBL) Format”, for more information. (Bug#12092, Bug#28086, Bug#30244)

  • Cluster Replication: A replication heartbeat mechanism has been added to facilitate monitoring. This provides an alternative to checking log files, making it possible to detect in real time when a slave has failed.

    Configuration of heartbeats is done via a new MASTER_HEARTBEAT_PERIOD = interval clause for the CHANGE MASTER TO statement (see Section 11.6.2.1, “CHANGE MASTER TO Syntax”); monitoring can be done by checking the values of the status variables Slave_heartbeat_period and Slave_received_heartbeats (see Section 5.1.5, “Status Variables”).

    The addition of replication heartbeats addresses a number of issues:

    • Relay logs were rotated every slave_net_timeout seconds even if no statements were being replicated.

    • SHOW SLAVE STATUS displayed an incorrect value for seconds_behind_master following a FLUSH LOGS statement.

    • Replication master-slave connections used slave_net_timeout for connection timeouts.

    (Bug#20435, Bug#29309, Bug#30932)

  • The --event-scheduler option without a value disabled the event scheduler. Now it enables the event scheduler. (Bug#31332)

  • mysqldump produces a -- Dump completed on DATE comment at the end of the dump if --comments is given. The date causes dump files for identical data take at different times to appear to be different. The new options --dump-date and --skip-dump-date control whether the date is added to the comment. --skip-dump-date suppresses date printing. The default is --dump-date (include the date in the comment). (Bug#31077)

  • MySQL now can be compiled with gcc 4.2.x. There was a problem involving a conflict with the min() and max() macros in my_global.h. (Bug#28184)

  • It is now possible to set long_query_time in microseconds or to 0. Setting this value to 0 causes all queries to be recorded in the slow query log.

    Currently, fractional values can be used only when logging to files. We plan to provide this functionality for logging to tables when time-related data types are enhanced to support microsecond resolution. (Bug#25412)

  • INFORMATION_SCHEMA implementation changes were made that optimize certain types of queries for INFORMATION_SCHEMA tables so that they execute more quickly. Section 6.2.17, “INFORMATION_SCHEMA Optimization”, provides guidelines on how to take advantage of these optimizations by writing queries that minimize the need for the server to access the filesystem to obtain the information contained in INFORMATION_SCHEMA tables. By writing queries that enable the server to avoid directory scans or opening table files, you will obtain better performance. (Bug#19588)

  • When the server detects MyISAM table corruption, it now writes additional information to the error log, such as the name and line number of the source file, and the list of threads accessing the table. Example: Got an error from thread_id=1, mi_dynrec.c:368. This is useful information to include in bug reports.

  • Two options relating to slow query logging have been added for mysqld. --log-slow-slave-statements causes slow statements executed by a replication slave to be written to the slow query log; min_examined_row_limit can be used to cause queries which examine fewer than the stated number of rows not to be logged.

Bugs fixed:

  • Security Fix: Using RENAME TABLE against a table with explicit DATA DIRECTORY and INDEX DIRECTORY options can be used to overwrite system table information by replacing the symbolic link points. the file to which the symlink points.

    MySQL will now return an error when the file to which the symlink points already exists. (Bug#32111, CVE-2007-5969)

  • Security Fix: ALTER VIEW retained the original DEFINER value, even when altered by another user, which could allow that user to gain the access rights of the view. Now ALTER VIEW is allowed only to the original definer or users with the SUPER privilege. (Bug#29908)

  • Security Fix: When using a FEDERATED table, the local server can be forced to crash if the remote server returns a result with fewer columns than expected. (Bug#29801)

  • Important Change: Incompatible Change: A number of problems existed in the implementation of MERGE tables that could cause problems. The problems are summarized below:

    • Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE corrupts a MERGE table. This was caused in a number of situations:

      1. A thread trying to lock a MERGE table performs busy waiting while REPAIR TABLE or a similar table administration task is ongoing on one or more of its MyISAM tables.

      2. A thread trying to lock a MERGE table performs busy waiting until all threads that did REPAIR TABLE or similar table administration tasks on one or more of its MyISAM tables in LOCK TABLES segments do UNLOCK TABLES. The difference against problem #1 is that the busy waiting takes place after the administration task. It is terminated by UNLOCK TABLES only.

      3. Two FLUSH TABLES within a LOCK TABLES segment can invalidate the lock. This does not require a MERGE table. The first FLUSH TABLES can be replaced by any statement that requires other threads to reopen the table. In 5.0 and 5.1 a single FLUSH TABLES can provoke the problem.

    • Bug#26867 - Simultaneously executing LOCK TABLES and REPAIR TABLE on a MERGE table would result in memory/cpu hogging.

      Trying DML on a MERGE table, which has a child locked and repaired by another thread, made an infinite loop in the server.

    • Bug#26377 - Deadlock with MERGE and FLUSH TABLE

      Locking a MERGE table and its children in parent-child order and flushing the child deadlocked the server.

    • Bug#25038 - Waiting TRUNCATE

      Truncating a MERGE child, while the MERGE table was in use, let the truncate fail instead of waiting for the table to become free.

    • Bug#25700 - MERGE base tables get corrupted by OPTIMIZE/ANALYZE/REPAIR TABLE

      Repairing a child of an open MERGE table corrupted the child. It was necessary to FLUSH the child first.

    • Bug#30275 - MERGE tables: FLUSH TABLES or UNLOCK TABLES causes server to crash.

      Flushing and optimizing locked MERGE children crashed the server.

    • Bug#19627 - temporary merge table locking

      Use of a temporary MERGE table with non-temporary children could corrupt the children.

      Temporary tables are never locked. Creation of tables with non-temporary children of a temporary MERGE table is now prohibited.

    • Bug#27660 - Falcon: MERGE table possible

      It was possible to create a MERGE table with non-MyISAM children.

    • Bug#30273 - MERGE tables: Can't lock file (errno: 155)

      This was a Windows-only bug. Table administration statements sometimes failed with "Can't lock file (errno: 155)".

    The fix introduces the following changes in behavior:

    • This patch changes the behavior of temporary MERGE tables. Temporary MERGE must have temporary children. The old behavior was wrong. A temporary table is not locked. Hence even non-temporary children were not locked. See Bug#19627.

    • You cannot change the union list of a non-temporary MERGE table when LOCK TABLES is in effect. The following does not work:

      CREATE TABLE m1 ... ENGINE=MRG_MYISAM ...;
                  LOCK TABLES t1 WRITE, t2 WRITE, m1 WRITE;
                  ALTER TABLE m1 ... UNION=(t1,t2) ...;

      However, you can do this with a temporary MERGE table.

    • You cannot create a MERGE table with CREATE ... SELECT, neither as a temporary MERGE table, nor as a non-temporary MERGE table. For example:

      CREATE TABLE m1 ... ENGINE=MRG_MYISAM ... SELECT ...;

      Gives error message: table is not BASE TABLE.

    (Bug#26377, Bug#26379, Bug#26867, Bug#25038, Bug#25700, Bug#30275, Bug#19627, Bug#27660, Bug#30273)

  • Incompatible Change: SET PASSWORD statements now cause an implicit commit, and thus are prohibited within stored functions and triggers. (Bug#30904)

  • Incompatible Change: The mysql_install_db script could fail to locate some components (including resolveip) during execution if the --basedir option was specified on the command-line or within the my.cnf file. This was due to a conflict when comparing the compiled-in values and the supplied values.

    The --source-install command-line option to the script has been removed and replaced with the --srcdir option. mysql_install_db now locates components either using the compiled-in options, the --basedir option or --srcdir option. (Bug#30759)

  • Incompatible Change: It was possible for option files to be read twice at program startup, if some of the standard option file locations turned out to be the same directory. Now duplicates are removed from the list of files to be read.

    Also, users could not override system-wide settings using ~/.my.cnf because SYSCONFDIR/my.cnf was read last. The latter file now is read earlier so that ~/.my.cnf can override system-wide settings. (Bug#20748)

  • Partitioning: Important Note: An apostrophe or single quote character (') used in the DATA DIRECTORY, INDEX DIRECTORY, or COMMENT for a PARTITION clause caused the server to crash. When used as part of a CREATE TABLE statement, the crash was immediate. When used in an ALTER TABLE statement, the crash did not occur until trying to perform a SELECT or DML statement on the table. In either case, the server could not be completely restarted until the .FRM file corresponding to the newly created or altered table was deleted.

    Note

    Upgrading to the current (or later) release solves this problem only for tables that are newly created or altered. Tables created or altered in previous versions of the server to include ' characters in PARTITION options must still be removed by deleting the corresponding .FRM files and re-creating them afterwards.

    (Bug#30695)

  • Partitioning: MySQL Cluster: EXPLAIN PARTITIONS reported partition usage by queries on NDB tables according to the standard MySQL hash function than the hash function used in the NDB storage engine. (Bug#29550)

  • Replication: MySQL Cluster: Row-based replication from or to a big-endian machine where the table used the NDB storage engine failed, if the same table on the other machine was either non-NDB or the other machine was little-endian. (Bug#29549, Bug#30790)

    See also Bug#24231, Bug#30024, Bug#30133, Bug#30134

  • MySQL Cluster: An insert or update with combined range and equality constraints failed when run against an NDB table with the error Got unknown error from NDB. An example of such a statement would be UPDATE t1 SET b = 5 WHERE a IN (7,8) OR a >= 10;. (Bug#31874)

  • MySQL Cluster: An error with an if statement in sql/ha_ndbcluster.cc could potentially lead to an infinite loop in case of failure when working with AUTO_INCREMENT columns in NDB tables. (Bug#31810)

  • MySQL Cluster: The NDB storage engine code was not safe for strict-alias optimization in gcc 4.2.1. (Bug#31761)

  • MySQL Cluster: Following an upgrade, ndb_mgmd would fail with an ArbitrationError. (Bug#31690)

  • MySQL Cluster: It was possible in some cases for a node group to be “lost” due to missed local checkpoints following a system restart. (Bug#31525)

  • MySQL Cluster: A query against a table with TEXT or BLOB columns that would return more than a certain amount of data failed with Got error 4350 'Transaction already aborted' from NDBCLUSTER. (Bug#31482)

    This regression was introduced by Bug#29102

  • MySQL Cluster: NDB tables having names containing non-alphanumeric characters (such as “ $ ”) were not discovered correctly. (Bug#31470)

  • MySQL Cluster: A node failure during a local checkpoint could lead to a subsequent failure of the cluster during a system restart. (Bug#31257)

  • MySQL Cluster: In some cases, the cluster managment server logged entries multiple times following a restart of mgmd. (Bug#29565)

  • MySQL Cluster: ndb_mgm --help did not display any information about the -a option. (Bug#29509)

  • MySQL Cluster: An interpreted program of sufficient size and complexity could cause all cluster data nodes to shut down due to buffer overruns. (Bug#29390)

  • MySQL Cluster: Performing DELETE operations after a data node had been shut down could lead to inconsistent data following a restart of the node. (Bug#26450)

  • MySQL Cluster: UPDATE IGNORE could sometimes fail on NDB tables due to the use of unitialized data when checking for duplicate keys to be ignored. (Bug#25817)

  • MySQL Cluster: The cluster log was formatted inconsistently and contained extraneous newline characters. (Bug#25064)

  • MySQL Cluster: (Replication): Inconsistencies could occur between the master and the slave when replicating Disk Data tables. (Bug#19259, Bug#19227)

  • Partitioning: Repeated updates of a table that was partitioned by KEY on a TIMESTAMP column eventually crashed the server. (Bug#32067)

  • Partitioning: Selecting from a table partitioned by KEY on a VARCHAR column whose size was greater than 65530 caused the server to crash. (Bug#31705)

  • Partitioning: INSERT DELAYED into a partitioned table crashed the server. (Bug#31201)

  • Partitioning: Using ALTER TABLE to partition an existing table having an AUTO_INCREMENT column could crash the server. (Bug#30878)

    This regression was introduced by Bug#27405

  • Partitioning: Falcon cannot drop a table for which there is a pending transaction, but the error message for such attempts was misleading. (Bug#22972)

  • Replication: When dropping a database containing a stored procedure while using row-cased replication, the delete of the stored procedure from the mysql.proc table was recorded in the binary log following the DROP DATABASE statement. To correct this issue, DROP DATABASE now uses statement-based replication. (Bug#32435)

  • Replication: It was possible for the name of the relay log file to exceed the amount of memory reserved for it, possibly leading to a crash of the server. (Bug#31836)

    See also Bug#28597

  • Replication: Corruption of log events caused the server to crash on 64-bit Linux systems having 4 GB of memory or more. (Bug#31793)

  • Replication: Trying to replicate an update of a row that was missing on the slave led to a failure on the slave. (Bug#31702)

  • Replication: Table names were displayed as binary “garbage” characters in slave error messages. The issue was observed on 64-bit Windows but may have effected other platforms. (Bug#30854)

  • Replication: One thread could read uninitialized memory from the stack of another thread. This issue was only known to occur in a mysqld process acting as both a master and a slave. (Bug#30752)

  • Replication: It was possible to set SQL_SLAVE_SKIP_COUNTER such that the slave would jump into the middle of an event group, including possibly a transaction. (Bug#28618)

    See also Bug#12691

  • Replication: Due a previous change in how the default name and location of the binlog file were determined, replication failed following some upgrades. (Bug#28597)

    See also Bug#31836

    This regression was introduced by Bug#20166

  • Replication: Stored procedures having BIT parameters were not replicated correctly. (Bug#26199)

  • Replication: Issuing SHOW SLAVE STATUS as mysqld was shutting down could cause a crash. (Bug#26000)

  • Replication: If a temporary error occured inside an event group on an event that was not the first event of the group, the slave could get caught in an endless loop because the retry counter was reset whenever an event was executed successfully. (Bug#24860)

    See also Bug#12691, Bug#23171

  • Replication: An UPDATE statement using a stored function that modified a non-transactional table was not logged if it failed. This caused the copy of the non-transactional table on the master have a row that the copy on the slave did not. (Bug#23333)

    See also Bug#12713

  • Replication: A replication slave sometimes failed to reconnect because it was unable to run SHOW SLAVE HOSTS. It was not necessary to run this statement on slaves (since the master should track connection IDs), and the execution of this statement by slaves was removed. (Bug#21132)

    See also Bug#13963, Bug#21869

  • Replication: A replication slave sometimes stopped for changes that were idempotent (that is, such changes should have been considered “safe”), even though it should have simply noted that the change was already done, and continued operation. (Bug#19958)

  • Cluster Replication: A node failure during replication could lead to buckets out of order; now active subscribers are checked for, rather than empty buckets. (Bug#31701)

  • Cluster Replication: In some cases, not all tables were properly initialized before the binlog thread was started. (Bug#31618)

  • Using Falcon when accessing multiple versions of the same record, certain records could fail to be retrieved from the record cache, causing an assertion failure. (Bug#32862)

  • Creating an index on a Falcon table with a column using UTF32 that has been converted to UTF8 would cause a server crash. (Bug#32833)

  • Using ALTER TABLE on a Falcon table it would be possible to create two tables with the same name but different case. (Bug#32830)

  • Converting a table from InnoDB to Falcon, where the Falcon table with the same name (but different case) would cause a server crash. (Bug#32829)

  • Repeatedly creating and dropping Falcon tablespaces would fail because a dropped tablespace would not be dropped before the new tablespace file was created. (Bug#32621)

  • The INTERVAL() function incorrectly handled NULL values in the value list. (Bug#32560)

  • Use of a NULL-returning GROUP BY expression in conjunction with WITH ROLLUP could cause a server crash. (Bug#32558)

  • ORDER BY UpdateXML(...) caused the server to crash in queries where UpdateXML() returned NULL. (Bug#32557)

  • Falcon used a fixed index key size which would be too small to cope with some Falcon page sizes, leading to a crash. Falcon now supports variable length index keys according to the supported page sizes. See falcon_page_size. (Bug#32554)

  • The rules for valid column names were being applied differently for base tables and views. (Bug#32496)

  • Falcon options to set the limits of memory usage would not be honoured. This could lead to crashes and assertions during normal usage, instead of generating a suitable warning. (Bug#32413)

  • Falcon would incorrectly return the supported repeatable-read level when queried by the Online Backup system, preventing the ability to create a consistent snapshot backup. (Bug#32301)

  • Some uses of user variables in a query could result in a server crash. (Bug#32260)

  • Under certain conditions, the presence of a GROUP BY clause could cause an ORDER BY clause to be ignored. (Bug#32202)

  • Altering a Falcon table to support an auto increment column on a column with existing data and null values would incorrectly update the table and return an incorrect count of the altered rows. (Bug#32194)

  • InnoDB does not support SPATIAL indexes, but could crash when asked to handle one. Now an error is returned. (Bug#32125)

  • The server crashed on optimizations involving a join of INT and MEDIUMINT columns and a system variable in the WHERE clause. (Bug#32103)

  • mysql-test-run.pl used the --user option when starting mysqld, which produces warnings if the current user is not root. Now --user is added only for root. (Bug#32078)

  • Inserting, updating and deleting a large number of BLOB records in a Falcon table would take significant amount of time and may prevent shutdown. (Bug#32062)

  • On 64-bit platforms, assignments of values to enumeration-valued storage engine-specific system variables were not validated and could result in unexpected values. (Bug#32034)

  • A DELETE statement with a subquery in the WHERE clause would sometimes ignore an error during subquery evaluation and proceed with the delete operation. (Bug#32030)

  • Using dates in the range '0000-00-01' to '0000-00-99' range in the WHERE clause could result in an incorrect result set. (These dates are not in the supported range for DATE, but different results for a given query could occur depending on position of records containing the dates within a table.) (Bug#32021)

  • User-defined functions are not loaded if the server is started with the --skip-grant-tables option, but the server did not properly handle this case and issued an Out of memory error message instead. (Bug#32020)

  • If a user-defined function was used in a SELECT statement, and an error occurred during UDF initialization, the error did not terminate execution of the SELECT, but rather was converted to a warning. (Bug#32007)

  • In debug builds, testing the result of an IN subquery against NULL caused an assertion failure. (Bug#31884)

  • SHOW CREATE TRIGGER caused a server crash. (Bug#31866)

  • The server crashed after insertion of a negative value into an AUTO_INCREMENT column of an InnoDB table. (Bug#31860)

  • For libmysqld applications, handling of mysql_change_user() calls left some pointers improperly updated, leading to server crashes. (Bug#31850)

  • Comparison results for BETWEEN were different from those for operators like < and > for DATETIME-like values with trailing extra characters such as '2007-10-01 00:00:00 GMT-6'. BETWEEN treated the values as DATETIME, whereas the other operators performed a binary-string comparison. Now they all uniformly use a DATETIME comparison, but generate warnings for values with trailing garbage. (Bug#31800)

  • With ONLY_FULL_GROUP_BY SQL mode enabled, queries such as SELECT a FROM t1 HAVING COUNT(*)>2 were not being rejected as they should have been. (Bug#31794)

  • The server could crash during filesort for ORDER BY based on expressions with INET_NTOA() or OCT() if those functions returned NULL. (Bug#31758)

  • For a fatal error during filesort in find_all_keys(), the error was returned without the necessary handler uninitialization, causing an assertion failure. Fixed by uninitializing the handler before returning the error. (Bug#31742)

  • The examined-rows count was not incremented for const queries. (Bug#31700)

  • Falcon tables would fail during replication if ROW-based replication was specified. (Bug#31671)

  • The mysql_change_user() C API function was subject to buffer overflow. (Bug#31669)

  • For SELECT ... INTO OUTFILE, if the ENCLOSED BY string is empty and the FIELDS TERMINATED BY string started with a special character (one of n, t, r, b, 0, Z, or N), every occurrence of the character within field values would be duplicated. (Bug#31663)

  • SHOW COLUMNS and DESCRIBE displayed null as the column type for a view with no valid definer. This caused mysqldump to produce a non-reloadable dump file for the view. (Bug#31662)

  • The mysqlbug script did not include the correct values of CFLAGS and CXXFLAGS that were used to configure the distribution. (Bug#31644)

  • For queries for which loose index scan is applicable, the optimizer could choose the wrong execution plan for correlated subqueries. (Bug#31639)

  • Queries that include a comparison of an INFORMATION_SCHEMA table column to NULL caused a server crash. (Bug#31633)

  • EXPLAIN EXTENDED for SELECT from INFORMATION_SCHEMA tables caused an assertion failure. (Bug#31630)

  • A buffer used when setting variables was not dimensioned to accommodate the trailing '\0' byte, so a single-byte buffer overrun was possible. (Bug#31588)

  • For semi-join processing, pullout of functionally dependent tables was not handled transitively. (Bug#31563)

  • HAVING could treat lettercase of table aliases incorrectly if lower_case_table_names was enabled. (Bug#31562)

  • Spurious duplicate-key errors could occur for multiple-row inserts into an InnoDB table that activate a trigger. (Bug#31540)

  • When inserting dates into a DATETIME column with a Falcon, the values would automatically be converted with values between 70 and 99 converted to 1970-1999, and values from 00 to 69 converted to 2000 to 2069. These dates are now correctly handled. (Bug#31490)

  • The length of the result from IFNULL() could be calculated incorrectly because the sign of the result was not taken into account. (Bug#31471)

  • Queries that used the ref access method or index-based subquery execution over indexes that have DECIMAL columns could fail with an error Column col_name cannot be null. (Bug#31450)

  • InnoDB now tracks locking and use of tables by MySQL only after a table has been successfully locked on behalf of a transaction. Previously, the locked flag was set and the table in-use counter was updated before checking whether the lock on the table succeeded. A subsequent failure in obtaining a lock on the table led to an inconsistent state as the table was neither locked nor in use. (Bug#31444)

  • SELECT 1 REGEX NULL caused an assertion failure for debug servers. (Bug#31440)

  • INFORMATION_SCHEMA.TABLES was returning incorrect information. (Bug#31381)

  • DROP USER caused an increase in memory usage. (Bug#31347)

  • TABLESPACE names within Falcon did not support characters outside the alpha-numeric ASCII character set. (Bug#31311)

  • For InnoDB tables with READ COMMITTED isolation level, UPDATE statements skipped rows locked by another transaction, rather than waiting for the locks to be released. (Bug#31310)

  • For an almost-full MyISAM table, an insert that failed could leave the table in a corrupt state. (Bug#31305)

  • When dropping Falcon tablespaces the associated tablespace file would not be deleted. (Bug#31296)

  • myisamchk --unpack could corrupt a table that when unpacked has static (fixed-length) row format. (Bug#31277)

  • Building a 64-bit binary with support for the Falcon storage engine using gcc on Solaris could fail. See Section 2.9, “MySQL Installation Using a Source Distribution”, for more information. (Bug#31268, Bug#33126)

  • When a TIMESTAMP with a non-zero time part was converted to a DATE value, no warning was generated. This caused index lookups to assume that this is a valid conversion and was returning rows that match a comparison between a TIMESTAMP value and a DATE keypart. Now a warning is generated so that TIMESTAMP with a non-zero time part will not match DATE values. (Bug#31221)

  • If MAKETIME() returned NULL when used in an ORDER BY that was evaluated using filesort, a server crash could result. (Bug#31160)

  • LAST_INSERT_ID() execution could be handled improperly in subqueries. (Bug#31157)

  • An assertion designed to detect a bug in the ROLLUP implementation would incorrectly be triggered when used in a subquery context with non-cacheable statements. (Bug#31156)

  • When creating a TABLESPACE that uses the same name as an existing TABLESPACE, Falcon would return Unknown error -103. MySQL will now return an error stating that the specified tablespace already exists. (Bug#31114)

  • mysqldump failed to handle databases containing a ‘-’ character in the name. (Bug#31113)

  • Starting the server using --read-only and with the Event Scheduler enabled caused it to crash.

    Note

    This issue occurred only when the server had been built with certain nonstandard combinations of configure options.

    (Bug#31111)

  • Dropping a tablespace and specifying an engine type that does not support tablespaces would report a warning. The response has now been updated to report an error. (Bug#31110)

  • GROUP BY NULL WITH ROLLUP could cause a server crash. (Bug#31095)

  • A rule to prefer filesort over an indexed ORDER BY when accessing all rows of a table was being used even if a LIMIT clause was present. (Bug#31094)

  • REGEXP operations could cause a server crash for character sets such as ucs2. Now the arguments are converted to utf8 if possible, to allow correct results to be produced if the resulting strings contain only 8-bit characters. (Bug#31081)

  • Expressions of the form WHERE col NOT IN (col, ...), where the same column was named both times, could cause a server crash in the optimizer. (Bug#31075)

  • Falcon would fail to compile on FreeBSD. This limitation has now been fixed. (Bug#31045)

  • Using ORDER BY with ARCHIVE tables caused a server crash. (Bug#31036)

  • The MOD() function and the % operator crashed the server for a divisor less than 1 with a very long fractional part. (Bug#31019)

  • Using falcon_serial_log_dir to set the location of the Falcon serial log would have no effect. (Bug#31005)

  • The LooseScan subquery optimization strategy could produce duplicate rows in query results. (Bug#30993)

  • A character set introducer followed by a hexadecimal or bit-value literal did not check its argument and could return an ill-formed result for invalid input. (Bug#30986)

  • CHAR(str USING charset) did not check its argument and could return an ill-formed result for invalid input. (Bug#30982)

  • The result from CHAR(str USING ucs2) did not add a leading 0x00 byte for input strings with an odd number of bytes. (Bug#30981)

  • A cluster restart could sometimes fail due to an issue with table IDs. (Bug#30975)

  • The GeomFromText() function could cause a server crash if the first argument was NULL or the empty string. (Bug#30955)

  • When invoked with constant arguments, STR_TO_DATE() could use a cached value for the format string and return incorrect results. (Bug#30942)

  • GROUP_CONCAT() returned ',' rather than an empty string when the argument column contained only empty strings. (Bug#30897)

  • A server crash could occur if a stored function that contained a DROP TEMPORARY TABLE statement was invoked by a CREATE TEMPORARY TABLE statement that created a table of the same name. (Bug#30882)

  • Calling NAME_CONST() with non-constant arguments triggered an assertion failure. Non-constant arguments are now disallowed. (Bug#30832)

  • Running ALTER TABLE ... OPTIMIZE PARTITION on a Falcon table, a 'divide by zero' error would be reported during a server crash. (Bug#30826)

  • For a spatial column with a regular (non-SPATIAL) index, queries failed if the optimizer tried to use the index. (Bug#30825)

  • INFORMATION_SCHEMA.SCHEMATA was returning incorrect information. (Bug#30795)

  • On Windows, the pthread_mutex_trylock() implementation was incorrect. One symptom was that invalidating the query cache could cause a server crash. (Bug#30768)

  • Under some circumstances, CREATE TABLE ... SELECT could crash the server or incorrectly report that the table row size was too large. (Bug#30736)

  • Using the MIN() or MAX() function to select one part of a multi-part key could cause a crash when the function result was NULL. (Bug#30715)

  • INFORMATION_SCHEMA.VIEWS.VIEW_DEFINITION was incorrect for views that were defined to select from other INFORMATION_SCHEMA tables. (Bug#30689)

  • Issuing an ALTER SERVER statement to update the settings for a FEDERATED server would cause the mysqld to crash. (Bug#30671)

  • The optimizer could ignore ORDER BY in cases when the result set is ordered by filesort, resulting in rows being returned in incorrect order. (Bug#30666)

  • A different execution plan was displayed for EXPLAIN than would actually have been used for the SELECT because the test of sort keys for ORDER BY did not consider keys mentioned in IGNORE KEYS FOR ORDER BY. (Bug#30665)

  • MyISAM tables could not exceed 4294967295 (2^32 - 1) rows on Windows. (Bug#30638)

  • mysql-test-run.pl could not run mysqld with root privileges. (Bug#30630)

  • Using GROUP BY on an expression of the form timestamp_col DIV number caused a server crash due to incorrect calculation of number of decimals. (Bug#30587)

  • The options available to the CHECK TABLE statement were also allowed in OPTIMIZE TABLE and ANALYZE TABLE statements, but caused corruption during their execution. These options were never supported for the these statements, and an error is now raised if you try to apply these options to these statements. (Bug#30495)

  • When expanding a * in a USING or NATURAL join, the check for table access for both tables in the join was done using only the grant information of the first table. (Bug#30468)

  • A table-access check was performed improperly by libmysqld, causing a crash. (Bug#30329)

  • Some valid euc-kr characters having the second byte in the ranges [0x41..0x5A] and [0x61..0x7A] were rejected. (Bug#30315)

  • When loading a dynamic plugin on FreeBSD, the plugin would fail to load. This was due to a build error where the required symbols would be not exported correctly. (Bug#30296)

  • Setting certain values on a table using a spatial index could cause the server to crash. (Bug#30286)

  • Some INFORMATION_SCHEMA tables are intended for internal use, but could be accessed by using SHOW statements. (Bug#30079)

  • On some 64-bit systems, inserting the largest negative value into a BIGINT column resulted in incorrect data. (Bug#30069)

  • mysqlslap did not properly handle multiple result sets from stored procedures. (Bug#29985)

  • Running the sqlbench test suite against Falcon would cause a crash. (Bug#29870)

  • When accessing the statistics in INFORMATION_SCHEMA.FALCON_DATABASE_IO, the information would related only to the Falcon database, not user tablespaces. The output has been updated to report on all tablespaces, and the column title has been changed to reflect the fact that the statistics are now reported by tablespace, not database. (Bug#29823)

  • Whitespace characters other than spaces within XML tags, such as linefeeds or tabs, caused LOAD XML INFILE to skip rows. (Bug#29752)

  • configure did not find nss on some Linux platforms. (Bug#29658)

  • Compilation failed on systems where a native log2() implementation was unavailable. (Bug#29640)

  • Use of the latin2_czech_cs collation caused a server crash. (Bug#29459)

  • Using two simultaneous connections it was possible to create a deadlock situation between two different active transactions on the same Falcon table. There is no way to prevent this, but a new parameter, falcon_lock_timeout can set the timeout for deadlocked transactions. The default timeout is 0 (timeouts are disabled). (Bug#29452)

  • The mysql client program now ignores Unicode byte order mark (BOM) characters at the beginning of input files. Previously, it read them and sent them to the server, resulting in a syntax error.

    Presence of a BOM does not cause mysql to change its default character set. To do that, invoke mysql with an option such as --default-character-set=utf8. (Bug#29323)

  • Insert information into the same table from multiple threads could cause duplicate key errors. This was related to the changes made to allow compatibility with the InnoDB repeatable-read isolation level. The option, falcon_innodb_compatibility, has been renamed to falcon_consistent_read, but with the opposite effect. The default is for this option to be on. When set to off, the behaviour of Falcon is similar to that in InnoDB. (Bug#29151)

  • For transactional tables, an error during a multiple-table DELETE statement did not roll back the statement. (Bug#29136)

  • The log and log_slow_queries system variables were displayed by SHOW VARIABLES but could not be accessed in expressions as @@log and @@log_slow_queries. Also, attempting to set them with SET produced an incorrect Unknown system variable message. Now these variables are treated as synonyms for general_log and slow_query_log, which means that they can be accessed in expressions and their values can be changed with SET. (Bug#29131)

  • When loading large data sets using LOAD DATA INFILE into a Falcon table, the server could crash. (Bug#29081)

  • SHOW VARIABLES did not display the relay_log, relay_log_index, or relay_log_info_file system variables. (Bug#28893)

  • Index hints specified in view definitions were ignored when using the view to select from the base table. (Bug#28702)

  • Views do not have indexes, so index hints do not apply. Use of index hints when selecting from a view is now disallowed. (Bug#28701)

  • After changing the SQL mode to a restrictive value that would make already-inserted dates in a column be considered invalid, searches returned different results depending on whether the column was indexed. (Bug#28687)

  • The result from CHAR() was incorrectly assumed in some contexts to return a single-byte result. (Bug#28550)

  • Using a temporary table within Falcon that is created in a directory where the path contains a mixture of upper and lower letters would fail. (Bug#28541)

  • Under heavy load when updating Falcon tables, a race condition could occur that would ultimately result in a crash. (Bug#28519)

  • The result of a comparison between VARBINARY and BINARY columns differed depending on whether the VARBINARY column was indexed. (Bug#28076)

  • The metadata in some MYSQL_FIELD members could be incorrect when a temporary table was used to evaluate a query. (Bug#27990)

  • It was possible to create a view having a column whose name consisted of an empty string or space characters only. (Bug#27695)

    See also Bug#31202

  • ALTER TABLE tbl_name ROW_FORMAT=format_type did not cause the table to be rebuilt. (Bug#27610)

  • Searching a Falcon table that uses DATETIME columns with an index could return incorrect results. (Bug#27426)

  • Removing a partition on a Falcon table when there are two tables with the same name, but different case, would cause a crash during normal shutdown. (Bug#27425)

  • Mixing differently cased tables between MyISAM and Falcon tables would cause a crash. (Bug#27424)

  • The ExtractValue() and UpdateXML() functions performed extremely slowly for large amounts of XML data (greater than 64 KB). These functions now execute approximately 2000 times faster than previously. (Bug#27287)

  • On WIndows, writes to the debug log were using freopen() instead of fflush(), resulting in slower performance. (Bug#27099)

  • Connections from one mysqld server to another failed on Mac OS X, affecting replication and FEDERATED tables. (Bug#26664)

    See also Bug#29083

  • LOAD DATA INFILE ran very slowly when reading large files into partitioned tables. (Bug#26527)

  • Threads that were calculating the estimated number of records for a range scan did not respond to the KILL statement. That is, if a range join type is possible (even if not selected by the optimizer as a join type of choice and thus not shown by EXPLAIN), the query in the statistics state (shown by the SHOW PROCESSLIST) did not respond to the KILL statement. (Bug#25421)

  • For mysql --show-warnings, warnings were in some cases not displayed. (Bug#25146)

  • Using CREATE UNIQUE INDEX on a Falcon table where rows contain duplicate values could result in pending transactions to the table being deleted. (Bug#22842)

  • Creating a Falcon table with an auto-increment column that is not indexed as the first column in a multi-column index would auto0increment. This behavior was different to the behavior in both MyISAM and InnoDB. Falcon now rejects such tables during creation in the same way InnoDB does. (Bug#22564)

  • For storage engines that do not redefine handler::index_next_same() and are capable of indexes, statements that include a WHERE clause might select incorrect data. (Bug#22351)

  • Creating a new table or dropping a database on a newly created database or tablespace where the Falcon engine was used would raise an error. (Bug#22199)

  • Using TRUNCATE on a Falcon table did not reset the auto-increment counters and used an inefficient method of deleting existing data. (Bug#22173)

  • Creating a DATE outside the normal range within a Falcon table would result in a zero DATE value being returned, even though normally invalid values would be stored correctly in other storage engines. (Bug#22168)

  • Selecting information from a Falcon table using a DOUBLE column with an index would produce incorrect results. (Bug#22125)

  • The readline library has been updated to version 5.2. This addresses issues in the mysql client where history and editing within the client would fail to work as expected. (Bug#18431)

  • Performing a full text search on a table could cause a crash on a 64-bit platforms with certain characteristics. Searches that were known to cause a crash with certain datasets included numerical values and strings where the match string included data enclosed in single or double quotes. (Bug#11392)

  • mysql stripped comments from statements sent to the server. Now the --comments or --skip-comments option can be used to control whether to retain or strip comments. The default is --skip-comments. (Bug#11230, Bug#26215)

  • Executing DISABLE KEYS and ENABLE KEYS on a non-empty table would cause the size of the index file for the table to grow considerable. This was because the DISABLE KEYS operation would only mark the existing index, without deleting the index blocks. The ENABLE KEYS operation would re-create the index, adding new blocks, while the previous index blocks would remain. Existing indexes are now dropped and recreated when the ENABLE KEYS statement is executed. (Bug#4692)

C.1.3. Changes in MySQL 6.0.3 (16 November 2007)

Functionality added or changed:

  • Incompatible Change: Aliases for wildcards (as in SELECT t.* AS 'alias' FROM t) are no longer accepted and result in an error. Previously, such aliases were ignored silently. (Bug#27249)

  • Sinhala collations utf8_sinhala_ci and ucs2_sinhala_ci were added for the utf8 and ucs2 character sets. (Bug#26474)

  • If the value of the --log-warnings option is greater than 1, the server now writes access-denied errors to the error log (for example, if a client username or password is incorrect). (Bug#25822)

  • Added the PARAMETERS table to INFORMATION_SCHEMA. The PARAMETERS table provides information about stored function and procedure parameters, and about return values for stored functions.

Bugs fixed:

  • Incompatible Change: DROP TABLE now is allowed only if you have acquired a WRITE lock with LOCK TABLES, or if you hold no locks, or if the table is a TEMPORARY table.

    Previously, if other tables were locked, you could drop a table with a read lock or no lock, which could lead to deadlocks between clients. The new stricter behavior means that some usage scenarios will fail when previously they did not. (Bug#25858)

  • Incompatible Change: GRANT and REVOKE statements now cause an implicit commit, and thus are prohibited within stored functions and triggers. (Bug#21975, Bug#21422, Bug#17244)

  • MySQL Cluster: Adding a new TINYTEXT column to an NDB table which used COLUMN_FORMAT = DYNAMIC, and when binary logging was enabled, caused all cluster mysqld processes to crash. (Bug#30213)

  • MySQL Cluster: After adding a new column of one of the TEXT or BLOB types to an NDB table which used COLUMN_FORMAT = DYNAMIC, it was no longer possible to access or drop the table using SQL. (Bug#30205)

  • The server crashed on optimization of queries that compared an indexed DECIMAL column with a string value. (Bug#32262)

  • The server crashed on optimizations that used the range checked for each record access method. (Bug#32229)

  • When comparing a BLOB value that was null, memory corruption could occur casuing the server to crash. (Bug#32191)

  • Deleting a large number of records could sometimes take a significant amount of time. (Bug#27946)

  • Several buffer-size system variables were either being handled incorrectly for large values (for settings larger than 4GB, they were truncated to values less than 4GB without a warning), or were limited unnecessarily to 4GB even on 64-bit systems. The following changes were made:

    • For key_buffer_size, values larger than 4GB are allowed on 64-bit platforms.

    • For join_buffer_size, sort_buffer_size, and myisam_sort_buffer_size, values larger than 4GB are allowed on 64-bit platforms (except Windows, for which large values are truncated to 4GB with a warning).

    In addition, settings for read_buffer_size and read_rnd_buffer_size are limited to 2GB on all platforms. Larger values are truncated to 2GB with a warning. (Bug#5731, Bug#29419, Bug#29446)

C.1.4. Changes in MySQL 6.0.2 (04 September 2007)

Functionality added or changed:

  • Mac OS X (Intel) support has been added. To build on Mac OS X from the repository sources you must have the most recent versions of bison, automake, autoconf and libtool installed.

    There are known issues with the Falcon on Mac OS X build. (Bug#30564)

  • The Falcon record cache parameters have been altered. The falcon_max_record_memory and falcon_min_record_memory are no longer supported.

    Instead, the falcon_record_memory_max, falcon_record_scavenge_threshold, falcon_record_scavenge_floor and falcon_inital_allocation parameters are now used to control the caching of records in memory within Falcon. See Section 12.6.2, “Configuration Parameters”. (Bug#30083)

  • 64-bit Windows support.

  • Support for tablespaces.

  • New performance settings, falcon_log_windows, falcon_index_chill_threshold, and falcon_record_chill_threshold.

  • The option falcon_disable_fsync has been added. If set to true, then the periodic fsync operation is disabled.

  • The option falcon_initial_allocation has been added to control the initial size of a Falcon tablespace on disk.

Bugs fixed:

  • An assertion could be thrown during high number of concurrent updates of BLOB fields. (Bug#30463)

  • When loading large data sets into a Falcon table mysqld could crash. An Out of memory error will now be raised in this situation. (Bug#30251, Bug#30074)

  • Falcon would incorrectly allow creation of two tables with the same name but different case sensitivity, without raising an error, but treat the two tables as the same during further queries. . (Bug#30210)

  • Updating a large table without an index would lock all the records during a transaction and unlock the records individually. (Bug#30124)

  • Creating a tablespace with a unique name but using the same datafile as an existing tablespace results in the re-initialization of the tablespace and the loss of the data contained in it. Falcon will now report an error if you the datafile already exists. (Bug#29511)

  • Using SELECT on a table that uses two INT columns with a single index would fail to return rows that queried both columns and complex comparison operators. (Bug#29319)

  • Falcon could occasionally report a problem with a duplicate key error during INSERT when inserting the same data into a unique column on two or more connections simultaneously. (Bug#29240)

  • Inserting into a table with a unique index simultaneously on two connections in a way that would cause a deadlock would cause MySQL to hang. The deadlock situation is now identified and an error will be raised. (Bug#29206)

  • Wide DECIMAL columns would show rounding errors during SELECT. (Bug#29201)

  • Some Falcon variables were marked as status variables. (Bug#29169)

  • Accessing an INFORMATION_SCHEMA table generated by Falcon, when Falcon has not been enabled would cause mysqld to crash. (Bug#29014)

  • For debug builds, the server crashed when inserting a negated DECIMAL value of maximum precision (65 digits), such as for INSERT INTO ... SELECT -col_val ... (Bug#28810)

  • Accessing data within DECIMAL columns wider than 18 digits would cause a crash. (Bug#28725)

  • mysqld would crash after a high number of ALTER TABLE, INSERT and UPDATEstatements. (Bug#28515, Bug#22154)

  • Unique indexes on VARCHAR columns are not identified correctly. (Bug#28500)

  • Under certain situations the Falcon tables and log could become corrupt and prevent recovery from a crashed version of the files. (Bug#28351)

  • The value for FALCON_SYSTEM_MEMORY_SUMMARY.TOTAL_SPACE in INFORMATION_SCHEMA would be reported incorrectly. (Bug#28197)

  • Searching for rows within a table with some non-western character sets would fail to return the right results if the SELECT relied on an index. (Bug#27697)

  • Inserting large numbers of identical columns into a table, followed by a SELECT or UPDATE could cause a hang or crash. (Bug#27277)

  • Loading certain data sets through a direct import could cause index problems and crash. (Bug#26930)

  • DECIMAL columns with large widths did not work, either during INSERT or SELECT. . (Bug#26607)

  • DELETE statements could cause a crash when many simultaneous threads are running. (Bug#26475)

  • Falcon would fail to build under Mac OS X/Intel. A preliminary patch is available to allow building under Mac OS X/Intel only (PowerPC support is not yet available). Note that Mac OS X/Intel is still an unsupported platform. (Bug#26466)

  • Queries could fail with a Can't find record in ... error. (Bug#26328)

  • Under certain situations, shutting down MySQL using mysqladmin could cause Falcon to corrupt the database tables and fail to restart properly. (Bug#26296)

  • Searches for accented characters in a UTF8 table fail if an index exists for the column. (Bug#26057)

  • Searches using LIKE on a UTF8 table fail if the search relies an indexed column. (Bug#24921)

  • Searches for data on a partial index for a column using the UTF8 character set would fail. (Bug#24858)

  • Searches for data using exotic collation/character sets fail if the search relies on an indexed column. (Bug#23689)

  • Inserting rows to a table with a unique index where the unique index value is identical on two separate connections would block the second transaction. (Bug#22847)

  • Renaming a database would raise error ERROR 1030 (HY000): Got error 157 from storage engine. (Bug#22182)

  • Large inserts to a table within a single transaction trigger high memory usage and may ultimately crash. (Bug#22169)

  • Renaming tables to or from Falcon tablespaces would raise an error. (Bug#22155)

C.1.5. Changes in MySQL 6.0.1 (Not released)

This was an internal release only, and no binaries were published.

C.1.6. Changes in MySQL 6.0.0 (30 April 2007)

Functionality added or changed:

  • SELECT ... FOR UPDATE is now supported.

  • Uncommitted record scavenging has been implemented.

  • Performance diagnostics are available through INFORMATION_SCHEMA.

Bugs fixed:

  • Using SELECT ... FOR UPDATE and ROLLBACK could cause mysqld to hang indefinitely. (Bug#28165)

  • Concurrent updates on two different connections could lead to an assertion failure. (Bug#28090)

  • Updating a row within a table that has a unique compound index to a non-unique value would not raise an error. (Bug#27997)

  • Rolling back an inserted row while accessing the same on a different connection would cause a crash. (Bug#27993)

  • Creating a table with a 19 digit DECIMAL column would cause incorrect data to be stored. This is due to current limitation in Falcon where you cannot create a table with a column with greater than 18 digits precision (i.e. DECIMAL(18,9)). Creating a column with larger than this specification will fail and raise an error. (Bug#27962)

  • Executing INSERT INTO ... SELECT FROM could cause a crash on large data sets. (Bug#27951)

  • Inserting data into the same table on two different connections with autocommit disabled would cause a crash. (Bug#27895)

  • Creating a Falcon table immediately after creating a new database could cause a crash. (Bug#27768)

  • Executing SELECT ... FOR UPDATE in a second connection on a newly created and populated table could cause a crash. (Bug#27767)

  • Continually updating a BLOB column would cause MySQL server to crash. (Bug#27719)

  • Using a trigger on an UPDATE to a Falcon table when autocommit is disabled would cause MySQL server to crash. (Bug#27574)

  • Interrupting a stored procedure during execution could cause a crash. (Bug#27539)

  • Opening the same database with Falcon tables on a different connection could cause a crash. (Bug#27428)

  • Using ROLLBACK after a DELETE does not restore the deleted row. (Bug#27357)

  • Two simultaneous SELECT ... FOR UPDATE statements with READ-COMMITTED isolation level would result in the wrong error message being returned. (Bug#26871)

  • Row insertions to a table with long VARCHAR columns and large compound indexes would cause MySQL to crash. (Bug#26850)

  • Falcon could consume large amounts of memory during a high number of continuous INSERT statements. (Bug#26843)

  • Updating a partitioned table in two sessions simultaneously would cause MySQL to crash. (Bug#26828)

  • Locking between sessions when using SELECT ... FOR UPDATE would not work. (Bug#26826)

  • Tables with UNIQUE key constraints would not be enforced. (Bug#26803)

  • When updating a table with a unique key constraint the constraint would not be enforced. (Bug#26802)

  • Searching for records in a table with a DECIMAL(6,6) column would fail to find the value. (Bug#26469)

  • Rows with a numeric column may fail to find records with zero values. (Bug#26468)

  • Retrieving rows from a table that used an index would sometimes fail to return the row. (Bug#26452)

  • Continue handlers in stored procedures could cause a crash. (Bug#26433)

  • Tables with a long multi-column index may fail to find a record for UPDATE. (Bug#26420)

  • Updating BLOB columns could result in a crash. (Bug#26324)

  • Deleting a large quantity of rows in a single table may result in ERROR 1020. (Bug#26055)

  • A DROP TABLE statement on a table created using CREATE TABLE ... SELECT ... crashed the server. (Bug#25564)

  • Random updates of LONG VARCHAR columns would fail. (Bug#23818)

  • Running SELECT after a changing the table contents does not result in a new data set. (Bug#22181)

  • Using ALTER with interleaving transactions triggers mysqld to crash. (Bug#22165)

C.2. Changes in release 5.2.x (Development)

An overview of which features were added in MySQL 5.2 can be found here: Section 1.5.1, “What's New in MySQL 6.0”.

For a full list of changes, please refer to the changelog sections for each individual 5.2.x release.

C.2.1. Changes in MySQL 5.2.5 (08 August 2007: Alpha)

This is a new Alpha development release, fixing recently discovered bugs.

Note

This Alpha release, as any other pre-production release, should not be installed on production level systems or systems with critical data. It is good practice to back up your data before installing any new version of software. Although MySQL has worked very hard to ensure a high level of quality, protect your data by making a backup as you would for any software beta release. Please refer to our bug database at http://bugs.mysql.com/ for more details about the individual bugs fixed in this version.

This section documents all changes and bug fixes that have been applied since the last official MySQL release. If you would like to receive more fine-grained and personalized update alerts about fixes that are relevant to the version and features you use, please consider subscribing to MySQL Network (a commercial MySQL offering). For more details please see http://www.mysql.com/products/enterprise/advisors.html.

Functionality added or changed:

  • The INFORMATION_SCHEMA.COLUMNS table now has STORAGE and FORMAT columns. For NDB tables, STORAGE indicates whether a column is stored on disk or memory, and FORMAT indicates the column storage format (FIXED, DYNAMIC, or DEFAULT).

  • The INFORMATION_SCHEMA.STATISTICS table now has an INDEX_COMMENT column to indicate any comment string provided for the column. The SHOW INDEX statement now displays an Index_comment column that provides the same information.

  • It is now possible to control whether fixed-width or variable-width storage is used for a given column of an NDB table by means of the COLUMN_FORMAT specifier as part of the column's definition in a CREATE TABLE or ALTER TABLE statement.

    It is also possible to control whether a given column of an NDB table is stored in memory or on disk, using the STORAGE specifier as part of the column's definition in a CREATE TABLE or ALTER TABLE statement.

    For permitted values and other information about COLUMN_FORMAT and STORAGE, see Section 11.1.10, “CREATE TABLE Syntax”.

  • The LOAD XML INFILE statement was added. This statement makes it possible to read data directly from XML files into database tables. For more information, see Section 11.2.6, “LOAD XML Syntax”.

Bugs fixed:

  • Use of the latin2_czech_cs collation caused a server crash. (Bug#29459)

C.2.2. Changes in MySQL 5.2.4 (Not released)

This is a new Alpha development release, fixing recently discovered bugs.

Note

This Alpha release, as any other pre-production release, should not be installed on production level systems or systems with critical data. It is good practice to back up your data before installing any new version of software. Although MySQL has worked very hard to ensure a high level of quality, protect your data by making a backup as you would for any software beta release. Please refer to our bug database at http://bugs.mysql.com/ for more details about the individual bugs fixed in this version.

This section documents all changes and bug fixes that have been applied since the last official MySQL release. If you would like to receive more fine-grained and personalized update alerts about fixes that are relevant to the version and features you use, please consider subscribing to MySQL Network (a commercial MySQL offering). For more details please see http://www.mysql.com/products/enterprise/advisors.html.

Functionality added or changed:

  • The syntax for the LOCK TABLES statement has been extended to support transactional table locks that do not commit transactions automatically. Following LOCK TABLES ... IN SHARE MODE or LOCK TABLES ... IN EXCLUSIVE MODE, you can access tables not mentioned in the LOCK TABLES statement. You can now also issue these extended LOCK TABLES statements many times in succession, adding additional tables to the locked set, and without unlocking any tables that were locked previously. When using LOCK TABLES with IN SHARE MODE or IN EXCLUSIVE MODE, tables are not unlocked until the transaction is committed.

    The behavior of LOCK TABLES when not using IN SHARE MODE or IN EXCLUSIVE MODE remains unchanged.

  • A new SQL function, WEIGHT_STRING(), returns the weight string for an input string. The weight string represents the sorting and comparison value of the input string.

  • The maximum length of table comments was extended from 60 to 2048 characters. The maximum length of column comments was extended from 255 to 1024 characters. Index definitions now can include a comment of up to 1024 characters.

  • Parser performance was improved for identifier scanning and conversion of ASCII string literals.

C.2.3. Changes in MySQL 5.2.3 (15 February 2007)

Bugs fixed:

  • MySQL would crash with an assertion on startup during recovery referring to tc.log. (Bug#26161)

  • A crash would occur when running UPDATE within a loop inside a stored procedure. (Bug#25537)

C.2.4. Changes in MySQL 5.2.2 (Not released)

Bugs fixed:

  • MySQL would fail with an assertion on startup. (Bug#25835)

C.2.5. Changes in MySQL 5.2.1 (Not released)

Functionality added or changed:

  • Performance improvements: thread bottlenecks have been reduced when a larger number of parallel auto-commit threads executed a trivial query in a hard loop.

Bugs fixed:

  • Falcon compound primary key problem. (Bug#25828)

  • Assertion when killing a CREATE TABLE ... SELECT statement. (Bug#25565)

  • A DROP TABLE statement on a table created using CREATE TABLE ... SELECT ... crashed the server. (Bug#25564)

  • Crash if create index on nullable utf8 column. (Bug#25555)

  • Between fails with Unicode field. (Bug#24511)

C.3. MySQL Connector/ODBC (MyODBC) Change History

C.3.1. Changes in MySQL Connector/ODBC 5.1.2 (Not yet released)
C.3.2. Changes in MySQL Connector/ODBC 5.1.1 (13 December 2007)
C.3.3. Changes in MySQL Connector/ODBC 5.1.0 (10 September 2007)
C.3.4. Changes in MySQL Connector/ODBC 5.0.12 (Never released)
C.3.5. Changes in MySQL Connector/ODBC 5.0.11 (31 January 2007)
C.3.6. Changes in MySQL Connector/ODBC 5.0.10 (14 December 2006)
C.3.7. Changes in MySQL Connector/ODBC 5.0.9 (22 November 2006)
C.3.8. Changes in MySQL Connector/ODBC 5.0.8 (17 November 2006)
C.3.9. Changes in MySQL Connector/ODBC 5.0.7 (08 November 2006)
C.3.10. Changes in MySQL Connector/ODBC 5.0.6 (03 November 2006)
C.3.11. Changes in MySQL Connector/ODBC 5.0.5 (17 October 2006)
C.3.12. Changes in Connector/ODBC 5.0.3 (Connector/ODBC 5.0 Alpha 3) (20 June 2006)
C.3.13. Changes in Connector/ODBC 5.0.2 (Never released)
C.3.14. Changes in Connector/ODBC 5.0.1 (Connector/ODBC 5.0 Alpha 2) (05 June 2006)
C.3.15. Changes in MySQL Connector/ODBC 3.51.23 (Not yet released)
C.3.16. Changes in MySQL Connector/ODBC 3.51.22 (13 November 2007)
C.3.17. Changes in MySQL Connector/ODBC 3.51.21 (08 October 2007)
C.3.18. Changes in MySQL Connector/ODBC 3.51.20 (10 September 2007)
C.3.19. Changes in MySQL Connector/ODBC 3.51.19 (10 August 2007)
C.3.20. Changes in MySQL Connector/ODBC 3.51.18 (08 August 2007)
C.3.21. Changes in MySQL Connector/ODBC 3.51.17 (14 July 2007)
C.3.22. Changes in MySQL Connector/ODBC 3.51.16 (14 June 2007)
C.3.23. Changes in MySQL Connector/ODBC 3.51.15 (7 May 2007)
C.3.24. Changes in MySQL Connector/ODBC 3.51.14 (08 March 2007)
C.3.25. Changes in MySQL Connector/ODBC 3.51.13 (Never released)
C.3.26. Changes in MySQL Connector/ODBC 3.51.12 (11 Febrauary 2005)
C.3.27. Changes in MySQL Connector/ODBC 3.51.11 (28 January 2005)

C.3.1. Changes in MySQL Connector/ODBC 5.1.2 (Not yet released)

Functionality added or changed:

  • A full implementation of SQLForeignKeys based on the information available from INFORMATION_SCHEMA in 5.0 and later versions of the server has been implemented.

Bugs fixed:

  • SQLGetInfo() reported characters for SQL_SPECIAL_CHARACTERS that were not encoded correctly. (Bug#33130)

  • Renaming an existing DSN entry would create a new entry with the new name without deleting the old entry. (Bug#31165)

  • Reading a TEXT column that had been used to store UTF8 data would result in the wrong information being returned during a query. (Bug#28617)

  • SQLForeignKeys would return an empty string for the schema columns instead of NULL. (Bug#19923)

  • Evaluating a simple numeric expression when using the OLEDB for ODBC provider and ADO would return an error, instead of the result. (Bug#10128)

  • Adding or updating a row using SQLSetPos() on a result set with aliased columns would fail. (Bug#6157)

C.3.2. Changes in MySQL Connector/ODBC 5.1.1 (13 December 2007)

MySQL Connector/ODBC 5.1.1-beta, a new version of the ODBC driver for the MySQL database management system, has been released. This release is the first beta (feature-complete) release of the new 5.1 series and is suitable for use with any MySQL server version since MySQL 4.1, including MySQL 5.0, 5.1, and 6.0. (It will not work with 4.0 or earlier releases.)

Keep in mind that this is a beta release, and as with any other pre-production release, caution should be taken when installing on production level systems or systems with critical data.

Includes changes from Connector/ODBC 3.51.21 and 3.51.22.

Built using MySQL 5.0.52.

Platform specific notes:

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • The installer for 64-bit Windows installs both the 32-bit and 64-bit driver. Please note that Microsoft does not yet supply a 64-bit bridge from ADO to ODBC.

Functionality added or changed:

  • Incompatible Change: Replaced myodbc3i (now myodbc-installer) with Connector/ODBC 5.0 version.

  • Incompatible Change: Removed monitor (myodbc3m) and dsn-editor (myodbc3c).

  • Incompatible Change: Disallow SET NAMES in initial statement and in executed statements.

  • A wrapper for the SQLGetPrivateProfileStringW() function, which is required for Unicode support, has been created. This function is missing from the unixODBC driver manager. (Bug#32685)

  • Added MSI installer for Windows 64-bit. (Bug#31510)

  • Implemented support for SQLCancel(). (Bug#15601)

  • Added support for SQL_NUMERIC_STRUCT. (Bug#3028, Bug#24920)

  • Removed non-threadsafe configuration of the driver. The driver is now always built against the threadsafe version of libmysql.

  • Implemented native Windows setup library

  • Replaced the internal library which handles creation and loading of DSN information. The new library, which was originally a part of Connector/ODBC 5.0, supports Unicode option values.

  • The Windows installer now places files in a subdirectory of the Program Files directory instead of the Windows system directory.

Bugs fixed:

  • The SET NAMES statement has been disabled because it causes problems in the ODBC driver when determining the current client character set. (Bug#32596)

  • SQLDescribeColW returned UTF-8 column as SQL_VARCHAR instead of SQL_WVARCHAR. (Bug#32161)

  • ADO was unable to open record set using dynamic cursor. (Bug#32014)

  • ADO applications would not open a RecordSet that contained a DECIMAL field. (Bug#31720)

  • Memory usage would increase considerably. (Bug#31115)

  • SQL statements are limited to 64KB. (Bug#30983, Bug#30984)

  • SQLSetPos with SQL_DELETE advances dynamic cursor incorrectly. (Bug#29765)

  • Using an ODBC prepared statement with bound columns would produce an empty result set when called immediately after inserting a row into a table. (Bug#29239)

  • ADO Not possible to update a client side cursor. (Bug#27961)

  • Recordset Update() fails when using adUseClient cursor. (Bug#26985)

  • Connector/ODBC would fail to connect to the server if the password contained certain characters, including the semicolon and other punctuation marks. (Bug#16178)

  • Fixed SQL_ATTR_PARAM_BIND_OFFSET, and fixed row offsets to work with updatable cursors.

  • SQLSetConnectAttr() did not clear previous errors, possibly confusing SQLError().

  • SQLError() incorrectly cleared the error information, making it unavailable from subsequent calls to SQLGetDiagRec().

  • NULL pointers passed to SQLGetInfo() could result in a crash.

  • SQL_ODBC_SQL_CONFORMANCE was not handled by SQLGetInfo().

  • SQLCopyDesc() did not correctly copy all records.

  • Diagnostics were not correctly cleared on connection and environment handles.

C.3.3. Changes in MySQL Connector/ODBC 5.1.0 (10 September 2007)

This release is the first of the new 5.1 series and is suitable for use with any MySQL server version since MySQL 4.1, including MySQL 5.0, 5.1, and 6.0. (It will not work with 4.0 or earlier releases.)

Keep in mind that this is a alpha release, and as with any other pre-production release, caution should be taken when installing on production level systems or systems with critical data. Not all of the features planned for the final Connector/ODBC 5.1 release are implemented.

Functionality is based on Connector/ODBC 3.51.20.

Platform specific notes:

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • There are no installer packages for Microsoft Windows x64 Edition.

Functionality added or changed:

  • Added support for Unicode functions (SQLConnectW, etc).

  • Added descriptor support (SQLGetDescField, SQLGetDescRec, etc).

  • Added support for SQL_C_WCHAR.

C.3.4. Changes in MySQL Connector/ODBC 5.0.12 (Never released)

Note

Development on Connector/ODBC 5.0.x has ceased. New features and functionality will be incorporated into Connector/ODBC 5.1. See Section 25.1.2.1, “Connector/ODBC Roadmap”.

Bugs fixed:

  • Inserting NULL values into a DATETIME column from Access reports an error. (Bug#27896)

  • Tables with TEXT columns would be incorrectly identified, returning an Unknown SQL type - 65535 error. (Bug#20127)

C.3.5. Changes in MySQL Connector/ODBC 5.0.11 (31 January 2007)

Functionality added or changed:

  • Added support for ODBC v2 statement options using attributes.

  • Driver now builds and is partially tested under Linux with the iODBC driver manager.

Bugs fixed:

  • Connection string parsing for DSN-less connections could fail to identify some parameters. (Bug#25316)

  • Updates of MEMO or TEXT columns from within Microsoft Access would fail. (Bug#25263)

  • Transaction support has been added and tested. (Bug#25045)

  • Internal function, my_setpos_delete_ignore() could cause a crash. (Bug#22796)

  • Fixed occasional mis-handling of the SQL_NUMERIC_C type.

  • Fixed the binding of certain integer types.

C.3.6. Changes in MySQL Connector/ODBC 5.0.10 (14 December 2006)

Connector/ODBC 5.0.10 is the sixth BETA release.

Functionality added or changed:

  • Significant performance improvement when retrieving large text fields in pieces using SQLGetData() with a buffer smaller than the whole data. Mainly used in Access when fetching very large text fields. (Bug#24876)

  • Added initial unicode support in data and metadata. (Bug#24837)

  • Added initial support for removing braces when calling stored procedures and retrieving result sets from procedure calls. (Bug#24485)

  • Added loose handling of retrieving some diagnostic data. (Bug#15782)

  • Added wide-string type info for SQLGetTypeInfo().

Bugs fixed:

  • Editing DSN no longer crashes ODBC data source administrator. (Bug#24675)

  • String query parameters are new escaped correctly. (Bug#19078)

C.3.7. Changes in MySQL Connector/ODBC 5.0.9 (22 November 2006)

Connector/ODBC 5.0.9 is the fifth BETA release.

This is an implementation and testing release, and is not designed for use within a production environment.

Functionality added or changed:

  • Added support for column binding as SQL_NUMBERIC_STRUCT.

  • Added recognition of SQL_C_SHORT and SQL_C_TINYINT as C types.

Bugs fixed:

  • Fixed wildcard handling of and listing of catalogs and tables in SQLTables.

  • Added limit of display size when requested via SQLColAttribute/SQL_DESC_DISPLAY_SIZE.

  • Fixed buffer length return for SQLDriverConnect.

  • ODBC v2 behaviour in driver now supports ODBC v3 date/time types (since DriverManager maps them).

  • Catch use of SQL_ATTR_PARAMSET_SIZE and report error until we fully support.

  • Fixed statistics to fail if it couldn't be completed.

  • Corrected retrieval multiple field types bit and blob/text.

  • Fixed SQLGetData to clear the NULL indicator correctly during multiple calls.

C.3.8. Changes in MySQL Connector/ODBC 5.0.8 (17 November 2006)

Connector/ODBC 5.0.8 is the fourth BETA release.

This is an implementation and testing release, and is not designed for use within a production environment.

Functionality added or changed:

  • Also made SQL_DESC_NAME only fill in the name if there was a data pointer given, otherwise just the length.

  • Fixed display size to be length if max length isn’t available.

  • Made distinction between CHAR/BINARY (and VAR versions).

  • Wildcards now support escaped chars and underscore matching (needed to link tables with underscores in access).

Bugs fixed:

  • Fixed binding using SQL_C_LONG.

  • Fixed using wrong pointer for SQL_MAX_DRIVER_CONNECTIONS in SQLGetInfo.

  • Set default return to SQL_SUCCESS if nothing is done for SQLSpecialColumns.

  • Fixed MDiagnostic to use correct v2/v3 error codes.

  • Allow SQLDescribeCol to be called to retrieve the length of the column name, but not the name itself.

  • Length now used when handling bind parameter (needed in particular for SQL_WCHAR) - this enables updating char data in MS Access.

  • Updated retrieval of descriptor fields to use the right pointer types.

  • Fixed hanlding of numeric pointers in SQLColAttribute.

  • Fixed type returned for MYSQL_TYPE_LONG to SQL_INTEGER instead of SQL_TINYINT.

  • Fix size return from SQLDescribeCol.

  • Fixed string length to chars, not bytes, returned by SQLGetDiagRec.

C.3.9. Changes in MySQL Connector/ODBC 5.0.7 (08 November 2006)

Connector/ODBC 5.0.7 is the third BETA release.

This is an implementation and testing release, and is not designed for use within a production environment.

Functionality added or changed:

  • Added support for SQLStatistics to MYODBCShell.

  • Improved trace/log.

Bugs fixed:

  • SQLBindParameter now handles SQL_C_DEFAULT.

  • Corrected incorrect column index within SQLStatistics. Many more tables can now be linked into MS Access.

  • Fixed SQLDescribeCol returning column name length in bytes rather than chars.

C.3.10. Changes in MySQL Connector/ODBC 5.0.6 (03 November 2006)

Connector/ODBC 5.0.6 is the second BETA release.

This is an implementation and testing release, and is not designed for use within a production environment.

Features, limitations and notes on this release

  • Connector/ODBC supports both User and System DSNs.

  • Installation is provided in the form of a standard Microsoft System Installer (MSI).

  • You no longer have to have Connector/ODBC 3.51 installed before installing this version.

Bugs fixed:

  • You no longer have to have Connector/ODBC 3.51 installed before installing this version.

  • Connector/ODBC supports both User and System DSNs.

  • Installation is provided in the form of a standard Microsoft System Installer (MSI).

C.3.11. Changes in MySQL Connector/ODBC 5.0.5 (17 October 2006)

Connector/ODBC 5.0.5 is the first BETA release.

This is an implementation and testing release, and is not designed for use within a production environment.

You no longer have to have Connector/ODBC 3.51 installed before installing this version.

Bugs fixed:

  • You no longer have to have Connector/ODBC 3.51 installed before installing this version.

C.3.12. Changes in Connector/ODBC 5.0.3 (Connector/ODBC 5.0 Alpha 3) (20 June 2006)

This is an implementation and testing release, and is not designed for use within a production environment.

Features, limitations and notes on this release:

  • The following ODBC API functions have been added in this release:

    • SQLBindParameter

    • SQLBindCol

C.3.13. Changes in Connector/ODBC 5.0.2 (Never released)

Connector/ODBC 5.0.2 was an internal implementation and testing release.

C.3.14. Changes in Connector/ODBC 5.0.1 (Connector/ODBC 5.0 Alpha 2) (05 June 2006)

Features, limitations and notes on this release:

  • Connector/ODBC 5.0 is Unicode aware.

  • Connector/ODBC is currently limited to basic applications. ADO applications and Microsoft Office are not supported.

  • Connector/ODBC must be used with a Driver Manager.

  • The following ODBC API functions are implemented:

    • SQLAllocHandle

    • SQLCloseCursor

    • SQLColAttribute

    • SQLColumns

    • SQLConnect

    • SQLCopyDesc

    • SQLDisconnect

    • SQLExecDirect

    • SQLExecute

    • SQLFetch

    • SQLFreeHandle

    • SQLFreeStmt

    • SQLGetConnectAttr

    • SQLGetData

    • SQLGetDescField

    • SQLGetDescRec

    • SQLGetDiagField

    • SQLGetDiagRec

    • SQLGetEnvAttr

    • SQLGetFunctions

    • SQLGetStmtAttr

    • SQLGetTypeInfo

    • SQLNumResultCols

    • SQLPrepare

    • SQLRowcount

    • SQLTables

    The following ODBC API function are implemented, but not yet support all the available attributes/options:

    • SQLSetConnectAttr

    • SQLSetDescField

    • SQLSetDescRec

    • SQLSetEnvAttr

    • SQLSetStmtAttr

C.3.15. Changes in MySQL Connector/ODBC 3.51.23 (Not yet released)

Platform specific notes:

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • There are no installer packages for Microsoft Windows x64 Edition.

Bugs fixed:

  • Connector/ODBC would incorrectly return SQL_SUCCESS when checking for distributed transaction support. (Bug#32727)

  • When using unixODBC or directly linked applications where the thread level is set to less than 3 (within odbcinst.ini), a thread synchronization issue would lead to an application crash. This was because SQLAllocStmt() and SQLFreeStmt() did not synchronize access to the list of statements associated with a connection. (Bug#32587)

  • Cleaning up environment handles in multithread environments could result in a five (or more) second delay. (Bug#32366)

  • Renaming an existing DSN entry would create a new entry with the new name without deleting the old entry. (Bug#31165)

  • Setting the default database using the DefaultDatabase property of an ADO Connection object would fail with the error Provider does not support this property. The SQLGetInfo() returned the wrong value for SQL_DATABASE_NAME when no database was selected. (Bug#3780)

C.3.16. Changes in MySQL Connector/ODBC 3.51.22 (13 November 2007)

Functionality added or changed:

  • The workaround for this bug was removed due to the fixes in MySQL Server 5.0.48 and 5.1.21.

    This regression was introduced by Bug#10491

Bugs fixed:

  • The English locale would be used when formatting floating point values. The C locale is now used for these values. (Bug#32294)

  • When accessing information about supported operations, the driver would return incorrect information about the support for UNION. (Bug#32253)

  • Unsigned integer values greater than the maximum value of a signed integer would be handled incorrectly. (Bug#32171)

  • The wrong result was returned by SQLGetData() when the data was an empty string and a zero-sized buffer was specified. (Bug#30958)

  • Added the FLAG_COLUMN_SIZE_S32 option to limit the reported column size to a signed 32-bit integer. This option is automatically enabled for ADO applications to provide a work around for a bug in ADO. (Bug#13776)

C.3.17. Changes in MySQL Connector/ODBC 3.51.21 (08 October 2007)

Bugs fixed:

  • When using a rowset/cursor and add a new row with a number of fields, subsequent rows with fewer fields will include the original fields from the previous row in the final INSERT statement. (Bug#31246)

  • Uninitiated memory could be used when C/ODBC internally calls SQLGetFunctions(). (Bug#31055)

  • The wrong SQL_DESC_LITERAL_PREFIX would be returned for date/time types. (Bug#31009)

  • The wrong COLUMN_SIZE would be returned by SQLGetTypeInfo for the TIME columns (SQL_TYPE_TIME). (Bug#30939)

  • Clicking outside the character set selection box when configuring a new DSN could cause the wrong character set to be selected. (Bug#30568)

  • Not specifying a user in the DSN dialog would raise a warning even though the parameter is optional. (Bug#30499)

  • SQLSetParam() caused memory allocation errors due to driver manager's mapping of deprecated functions (buffer length -1). (Bug#29871)

  • When using ADO, a column marked as AUTO_INCREMENT could incorrectly report that the column allowed NULL values. This was dur to an issue with NULLABLE and IS_NULLABLE return values from the call to SQLColumns(). (Bug#26108)

  • Connector/ODBC would return the wrong the error code when the server disconnects the active connection because the configured wait_timeout has expired. Previously it would return HY000. Connector/ODBC now correctly returns an SQLSTATE of 08S01. (Bug#3456)

C.3.18. Changes in MySQL Connector/ODBC 3.51.20 (10 September 2007)

Bugs fixed:

  • Using FLAG_NO_PROMPT doesn't suppress the dialogs normally handled by SQLDriverConnect. (Bug#30840)

  • The specified length of the username and authentication parameters to SQLConnect() were not being honored. (Bug#30774)

  • The wrong column size was returned for binary data. (Bug#30547)

  • SQLGetData() will now always return SQL_NO_DATA_FOUND on second call when no data left, even if requested size is 0. (Bug#30520)

  • SQLGetConnectAttr() did not reflect the connection state correctly. (Bug#14639)

  • Removed checkbox in setup dialog for FLAG_FIELD_LENGTH (identified as Don't Optimize Column Width within the GUI dialog), which was removed from the driver in 3.51.18.

C.3.19. Changes in MySQL Connector/ODBC 3.51.19 (10 August 2007)

Connector/ODBC 3.51.19 fixes a specific issue with the 3.51.18 release. For a list of changes in the 3.51.18 release, see Section C.3.20, “Changes in MySQL Connector/ODBC 3.51.18 (08 August 2007)”.

Functionality added or changed:

  • Because of Bug#10491 in the server, character string results were sometimes incorrectly identified as SQL_VARBINARY. Until this server bug is corrected, the driver will identify all variable-length strings as SQL_VARCHAR.

C.3.20. Changes in MySQL Connector/ODBC 3.51.18 (08 August 2007)

Platform specific notes:

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • Binary packages for Sun Solaris are now available as PKG packages.

  • Binary packages as disk images with installers are now available for Mac OS X.

  • A binary package without an installer is available for Microsoft Windows x64 Edition. There are no installer packages for Microsoft Windows x64 Edition.

Functionality added or changed:

  • When connecting to a specific database when using a DSN, the system tables from the mysql database are no longer also available. Previously, tables from the mysql database (catalog) were listed as SYSTEM TABLES by SQLTables() even when a different catalog was being queried. (Bug#28662)

  • Installed for Mac OS X has been re-instated. The installer registers the driver at a system (not user) level and makes it possible to create both user and system DSNs using the Connector/ODBC driver. The installer also fixes the situation where the necessary drivers would bge installed local to the user, not globally. (Bug#15326, Bug#10444)

  • Connector/ODBC now supports batched statements. In order to enable cached statement support you must switch enable the batched statement option (FLAG_MULTI_STATEMENTS, 67108864, or Allow multiple statements within a GUI configuration). Be aware that batched statements create an increased chance of SQL injection attacks and you must ensure that your application protects against this scenario. (Bug#7445)

  • The SQL_ATTR_ROW_BIND_OFFSET_PTR is now supported for row bind offsets. (Bug#6741)

  • The TRACE and TRACEFILE DSN options have been removed. Use the ODBC driver manager trace options instead.

Bugs fixed:

  • When using a table with multiple TIMESTAMP columns, the final TIMESTAMP column within the table definition would not be updateable. Note that there is still a limitation in MySQL server regarding multiple TIMESTAMP columns . (Bug#9927) (Bug#30081)

  • Fixed an issue where the myodbc3i would update the the user ODBC configuration file (~/Library/ODBC/odbcinst.ini) instead of the system /Library/ODBC/odbcinst.ini. This was caused because myodbc3i was not honouring the s and u modifiers for the -d command line option. (Bug#29964)

  • Getting table metadata (through the SQLColumns() would fail, returning a bad table definition to calling applications. (Bug#29888)

  • DATETIME column types would return FALSE in place of SQL_SUCCESS when requesting the column type information. (Bug#28657)

  • The SQL_COLUMN_TYPE, SQL_COLUMN_DISPLAY and SQL_COLUMN_PRECISION values would be returned incorrectly by SQLColumns(), SQLDescribeCol() and SQLColAttribute() when accessing character columns, especially those generated through concat(). The lengths returned should now conform to the ODBC specification. The FLAG_FIELD_LENGTH option no longer has any affect on the results returned. (Bug#27862)

  • Obtaining the length of a column when using a character set for the connection of utf8 would result in the length being returned incorrectly. (Bug#19345)

  • The SQLColumns() function could return incorrect information about TIMESTAMP columns, indicating that the field was not nullable. (Bug#14414)

  • The SQLColumns() function could return incorrect information about AUTO_INCREMENT columns, indicating that the field was not nullable. (Bug#14407)

  • A binary package without an installer is available for Microsoft Windows x64 Edition. There are no installer packages for Microsoft Windows x64 Edition.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • BIT(n) columns are now treated as SQL_BIT data where n = 1 and binary data where n > 1.

  • The wrong value from SQL_DESC_LITERAL_SUFFIX was returned for binary fields.

  • The SQL_DATETIME_SUB column in SQLColumns() was not correctly set for date and time types.

  • The value for SQL_DESC_FIXED_PREC_SCALE was not returned correctly for values in MySQL 5.0 and later.

  • The wrong value for SQL_DESC_TYPE was returned for date and time types.

  • SQLConnect() and SQLDriverConnect() were rewritten to eliminate duplicate code and ensure all options were supported using both connection methods. SQLDriverConnect() now only requires the setup library to be present when the call requires it.

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

  • Binary packages as disk images with installers are now available for Mac OS X.

  • Binary packages for Sun Solaris are now available as PKG packages.

  • The wrong value for DECIMAL_DIGITS in SQLColumns() was reported for FLOAT and DOUBLE fields, as well as the wrong value for the scale parameter to SQLDescribeCol(), and the SQL_DESC_SCALE attribute from SQLColAttribute().

  • The SQL_DATA_TYPE column in SQLColumns() results did not report the correct value for date and time types.

C.3.21. Changes in MySQL Connector/ODBC 3.51.17 (14 July 2007)

Platform specific notes:

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • Binary packages for Sun Solaris are now available as PKG packages.

  • Binary packages as disk images with installers are now available for Mac OS X.

  • A binary package without an installer is available for Microsoft Windows x64 Edition. There are no installer packages for Microsoft Windows x64 Edition.

Functionality added or changed:

  • It is now possible to specify a different character set as part of the DSN or connection string. This must be used instead of the SET NAMES statement. You can also configure the character set value from the GUI configuration. (Bug#9498, Bug#6667)

  • Fixed calling convention ptr and wrong free in myodbc3i, and fixed the null terminating (was only one, not two) when writing DSN to string.

  • Dis-allow NULL ptr for null indicator when calling SQLGetData() if value is null. Now returns SQL_ERROR w/state 22002.

  • The setup library has been split into its own RPM package, to allow installing the driver itself with no GUI dependencies.

Bugs fixed:

  • myodbc3i did not correctly format driver info, which could cause the installation to fail. (Bug#29709)

  • Connector/ODBC crashed with Crystal Reports due to a rproblem with SQLProcedures(). (Bug#28316)

  • Fixed a problem where the GUI would crash when configuring or removing a System or User DSN. (Bug#27315)

  • Fixed error handling of out-of-memory and bad connections in catalog functions. This might raise errors in code paths that had ignored them in the past. (Bug#26934)

  • For a stored procedure that returns multiple result sets, Connector/ODBC returned only the first result set. (Bug#16817)

  • Calling SQLGetDiagField with RecNumber 0, DiagIdentifier NOT 0 returned SQL_ERROR, preventing access to diagnostic header fields. (Bug#16224)

  • Added a new DSN option (FLAG_ZERO_DATE_TO_MIN) to retrieve XXXX-00-00 dates as the minimum allowed ODBC date (XXXX-01-01). Added another option (FLAG_MIN_DATE_TO_ZERO) to mirror this but for bound parameters. FLAG_MIN_DATE_TO_ZERO only changes 0000-01-01 to 0000-00-00. (Bug#13766)

  • If there was more than one unique key on a table, the correct fields were not used in handling SQLSetPos(). (Bug#10563)

  • When inserting a large BLOB field, Connector/ODBC would crash due to a memory allocation error. (Bug#10562)

  • The driver was using mysql_odbc_escape_string(), which does not handle the NO_BACKSLASH_ESCAPES SQL mode. Now it uses mysql_real_escape_string(), which does. (Bug#9498)

  • SQLColumns() did not handle many of its parameters correctly, which could lead to incorrect results. The table name argument was not handled as a pattern value, and most arguments were not escaped correctly when they contained non-alphanumeric characters. (Bug#8860)

  • There are no binary packages for Microsoft Windows x64 Edition.

  • There is no binary package for Mac OS X on 64-bit PowerPC because Apple does not currently provide a 64-bit PowerPC version of iODBC.

  • Correctly return error if SQLBindCol is called with an invalid column.

  • Fixed possible crash if SQLBindCol() was not called before SQLSetPos().

  • The Mac OS X binary packages are only provided as tarballs, there is no installer.

  • The binary packages for Sun Solaris are only provided as tarballs, not the PKG format.

  • The HP-UX 11.23 IA64 binary package does not include the GUI bits because of problems building Qt on that platform.

C.3.22. Changes in MySQL Connector/ODBC 3.51.16 (14 June 2007)

Functionality added or changed:

  • Connector/ODBC now supports using SSL for communication. This is not yet exposed in the setup GUI, but must be enabled through configuration files or the DSN. (Bug#12918)

Bugs fixed:

  • Calls to SQLNativeSql() could cause stack corruption due to an incorrect pointer cast. (Bug#28758)

  • Using curors on results sets with multi-column keys could select the wrong value. (Bug#28255)

  • SQLForeignKeys does not escape _ and % in the table name arguments. (Bug#27723)

  • When using stored procedures, making a SELECT or second stored procedure call after an initial stored procedure call, the second statement will fail. (Bug#27544)

  • SQLTables() did not distinguish tables from views. (Bug#23031)

  • Data in TEXT columns would fail to be read correctly. (Bug#16917)

  • Specifying strings as parameters using the adBSTR or adVarWChar types, (SQL_WVARCHAR and SQL_WLONGVARCHAR) would be incorrectly quoted. (Bug#16235)

  • SQL_WVARCHAR and SQL_WLONGVARCHAR parameters were not properly quoted and escaped. (Bug#16235)

  • Using BETWEEN with date values, the wrong results could be returned. (Bug#15773)

  • When using the Don't Cache Results (option value 1048576) with Microsoft Access, the connection will fail using DAO/VisualBasic. (Bug#4657)

  • Return values from SQLTables() may be truncated. (Bugs #22797)

C.3.23. Changes in MySQL Connector/ODBC 3.51.15 (7 May 2007)

Bugs fixed:

  • Connector/ODBC would incorrectly claim to support SQLProcedureColumns (by returning true when queried about SQLPROCEDURECOLUMNS with SQLGetFunctions), but this functionality is not supported. (Bug#27591)

  • An incorrect transaction isolation level may not be returned when accessing the connection attributes. (Bug#27589)

  • Adding a new DSN with the myodbc3i utility under AIX would fail. (Bug#27220)

  • When inserting data using bulk statements (through SQLBulkOperations), the indicators for all rows within the insert would not updated correctly. (Bug#24306)

  • Using SQLProcedures does not return the database name within the returned resultset. (Bug#23033)

  • The SQLTransact() function did not support an empty connection handle. (Bug#21588)

  • Using SQLDriverConnect instead of SQLConnect could cause later operations to fail. (Bug#7912)

  • When using blobs and parameter replacement in a statement with WHERE CURSOR OF, the SQL is truncated. (Bug#5853)

  • Connector/ODBC would return too many foreign key results when accessing tables with similar names. (Bug#4518)

C.3.24. Changes in MySQL Connector/ODBC 3.51.14 (08 March 2007)

Functionality added or changed:

  • Use of SQL_ATTR_CONNECTION_TIMEOUT on the server has now been disabled. If you attempt to set this attribute on your connection the SQL_SUCCESS_WITH_INFO will be returned, with an error number/string of HYC00: Optional feature not supported. (Bug#19823)

  • Added auto is null option to Connector/ODBC option parameters. (Bug#10910)

  • Added auto-reconnect option to Connector/ODBC option parameters.

  • Added support for the HENV handlers in SQLEndTran().

Bugs fixed:

  • On 64-bit systems, some types would be incorrectly returned. (Bug#26024)

  • When retrieving TIME columns, C/ODBC would incorrectly interpret the type of the string and could interpret it as a DATE type instead. (Bug#25846)

  • Connector/ODBC may insert the wrong parameter values when using prepared statements under 64-bit Linux. (Bug#22446)

  • Using Connector/ODBC, with SQLBindCol and binding the length to the return value from SQL_LEN_DATA_AT_EXEC fails with a memory allocation error. (Bug#20547)

  • Using DataAdapter, Connector/ODBC may continually consume memory when reading the same records within a loop (Windows Server 2003 SP1/SP2 only). (Bug#20459)

  • When retrieving data from columns that have been compressed using COMPRESS(), the retrieved data would be truncated to 8KB. (Bug#20208)

  • The ODBC driver name and version number were incorrectly reported by the driver. (Bug#19740)

  • A string format exception would be raised when using iODBC, Connector/ODBC and the embedded MySQL server. (Bug#16535)

  • The SQLDriverConnect() ODBC method did not work with recent Connector/ODBC releases. (Bug#12393)

C.3.25. Changes in MySQL Connector/ODBC 3.51.13 (Never released)

Connector/ODBC 3.51.13 was an internal implementation and testing release.

C.3.26. Changes in MySQL Connector/ODBC 3.51.12 (11 Febrauary 2005)

Functionality added or changed:

  • N/A

Bugs fixed:

  • Using stored procedures with ADO, where the CommantType has been set correctly to adCmdStoredProc, calls to stored procedures would fail. (Bug#15635)

  • File DSNs could not be saved. (Bug#12019)

  • SQLColumns() returned no information for tables that had a column named using a reserved word. (Bug#9539)

C.3.27. Changes in MySQL Connector/ODBC 3.51.11 (28 January 2005)

Bugs fixed:

  • mysql_list_dbcolumns() and insert_fields() were retrieving all rows from a table. Fixed the queries generated by these functions to return no rows. (Bug#8198)

  • SQLGetTypoInfo() returned tinyblob for SQL_VARBINARY and nothing for SQL_BINARY. Fixed to return varbinary for SQL_VARBINARY, binary for SQL_BINARY, and longblob for SQL_LONGVARBINARY. (Bug#8138)

C.4. MySQL Connector/NET Change History

C.4.1. Changes in MySQL Connector/NET 5.2.0 (Not yet released)
C.4.2. Changes in MySQL Connector/NET 5.1.4 (20 November 2007)
C.4.3. Changes in MySQL Connector/NET 5.1.3 (21 September 2007)
C.4.4. Changes in MySQL Connector/NET 5.1.2 (18 June 2007)
C.4.5. Changes in MySQL Connector/NET 5.1.1 (23 May 2007)
C.4.6. Changes in MySQL Connector/NET 5.1.0 (01 May 2007)
C.4.7. Changes in MySQL Connector/NET 5.0.9 (Not yet released)
C.4.8. Changes in MySQL Connector/NET 5.0.8 (21 August 2007)
C.4.9. Changes in MySQL Connector/NET 5.0.7 (18 May 2007)
C.4.10. Changes in MySQL Connector/NET 5.0.6 (22 March 2007)
C.4.11. Changes in MySQL Connector/NET 5.0.5 (07 March 2007)
C.4.12. Changes in MySQL Connector/NET 5.0.4 (Not released)
C.4.13. Changes in MySQL Connector/NET 5.0.3 (05 January 2007)
C.4.14. Changes in MySQL Connector/NET 5.0.2 (06 November 2006)
C.4.15. Changes in MySQL Connector/NET 5.0.1 (01 October 2006)
C.4.16. Changes in MySQL Connector/NET 5.0.0 (08 August 2006)
C.4.17. Changes in MySQL Connector/NET 1.0.11 (Not yet released)
C.4.18. Changes in MySQL Connector/NET 1.0.10 (24 August 2007)
C.4.19. Changes in MySQL Connector/NET 1.0.9 (02 February 2007)
C.4.20. Changes in MySQL Connector/NET 1.0.8 (20 October 2006)
C.4.21. Changes in MySQL Connector/NET 1.0.7 (21 November 2005)
C.4.22. Changes in MySQL Connector/NET 1.0.6 (03 October 2005)
C.4.23. Changes in MySQL Connector/NET 1.0.5 (29 August 2005)
C.4.24. Changes in MySQL Connector/NET 1.0.4 (20 January 2005)
C.4.25. Changes in MySQL Connector/NET 1.0.3 (12 October 2004)
C.4.26. Changes in MySQL Connector/NET 1.0.2 (15 November 2004)
C.4.27. Changes in MySQL Connector/NET 1.0.1 (27 October 2004)
C.4.28. Changes in MySQL Connector/NET 1.0.0 (01 September 2004)
C.4.29. Changes in MySQL Connector/NET Version 0.9.0 (30 August 2004)
C.4.30. Changes in MySQL Connector/NET Version 0.76
C.4.31. Changes in MySQL Connector/NET Version 0.75
C.4.32. Changes in MySQL Connector/NET Version 0.74
C.4.33. Changes in MySQL Connector/NET Version 0.71
C.4.34. Changes in MySQL Connector/NET Version 0.70
C.4.35. Changes in MySQL Connector/NET Version 0.68
C.4.36. Changes in MySQL Connector/NET Version 0.65
C.4.37. Changes in MySQL Connector/NET Version 0.60
C.4.38. Changes in MySQL Connector/NET Version 0.50

C.4.1. Changes in MySQL Connector/NET 5.2.0 (Not yet released)

Functionality added or changed:

  • Added support for DbDataAdapter UpdateBatchSize. Batching is fully supported including collapsing inserts down into the multi-value form if possible.

  • DDEX provider now works under Visual Studio 2008 beta 2.

  • Added ClearPool and ClearAllPools features.

Bugs fixed:

  • Data cached from the connection string could return invalid information because the internal routines were not using case-sensitive semantics. This lead to updated connection string options not being recognized if they were of a different case than the existing cached values. (Bug#31433)

  • Column name metadata was not using the character set as deifned within the connection string being used. (Bug#31185)

  • Memory usage could increase and decrease significantly when updating or inserting a large number of rows. (Bug#31090)

  • Commands executed from within the state change handeler would fail with a NULL exception. (Bug#30964)

  • When running a stored procedure multiple times on the same connection, the memory usage could increase indefinitely. (Bug#30116)

  • Using compression in the MySQL connection with Connector/NET would be slower than using native (uncompressed) communication. (Bug#27865)

  • The MySqlDbType.Datetime has been replaced with MySqlDbType.DateTime. The old format has been obsoleted. (Bug#26344)

C.4.2. Changes in MySQL Connector/NET 5.1.4 (20 November 2007)

Bugs fixed:

  • Setting the size of a string parameter after the value could cause an exception. (Bug#32094)

  • Creation of parameter objects with non-input direction using a constructor would fail. This was cause by some old legacy code preventing their use. (Bug#32093)

  • A date string could be returned incorrectly by MySqlDataTime.ToString() when the date returned by MySQL was 0000-00-00 00:00:00. (Bug#32010)

  • A syntax error in a set of batch statements could leave the data adapter in a state that appears hung. (Bug#31930)

  • Installing over a failed uninstall of a previous version could result in multiple clients being registered in the machine.config. This would prevent certain aspects of the MySQL connection within Visual Studio to work properly. (Bug#31731)

  • Connector/NET would incorrectly report success when enlisting in a distributed transaction, although distributed transactions are not supported. (Bug#31703)

  • Data cached from the connection string could return invalid information because the internal routines were not using case-sensitive semantics. This lead to updated connection string options not being recognized if they were of a different case than the existing cached values. (Bug#31433)

  • Trying to use a connection that was not open could return an ambiguous and misleading error message. (Bug#31262)

  • Column name metadata was not using the character set as deifned within the connection string being used. (Bug#31185)

  • Memory usage could increase and decrease significantly when updating or inserting a large number of rows. (Bug#31090)

  • Commands executed from within the state change handeler would fail with a NULL exception. (Bug#30964)

  • Extracting data through XML functions within a query returns the data as System.Byte[]. This was due to Connector/NET incorrectly identifying BLOB fields as binary, rather than text. (Bug#30233)

  • When running a stored procedure multiple times on the same connection, the memory usage could increase indefinitely. (Bug#30116)

  • Column types with only 1-bit (such as BOOLEAN and TINYINT(1) were not returned as boolean fields. (Bug#27959)

  • When accessing certain statements, the command would timeout before the command completed. Because this cannot always be controlled through the individual command timeout options, a default command timeout has been added to the connection string options. (Bug#27958)

  • The server error code was not updated in the Data[] hash, which prevented DbProviderFactory users from accessing the server error code. (Bug#27436)

  • The MySqlDbType.Datetime has been replaced with MySqlDbType.DateTime. The old format has been obsoleted. (Bug#26344)

  • Changing the connection string of a connection to one that changes the parameter marker after the connection had been assigned to a command but before the connection is opened could cause parameters to not be found. (Bug#13991)

C.4.3. Changes in MySQL Connector/NET 5.1.3 (21 September 2007)

This is a new Beta development release, fixing recently discovered bugs.

Bugs fixed:

  • An incorrect ConstraintException could be raised on an INSERT when adding rows to a table with a multiple-column unique key index. (Bug#30204)

  • A DATE field would be updated with a date/time value, causing a MySqlDataAdapter.Update() exception. (Bug#30077)

  • The Saudi Hijri calendar was not supported. (Bug#29931)

  • Calling SHOW CREATE PROCEDURE for routines with a hyphen in the catalog name produced a syntax error. (Bug#29526)

  • Connecting to a MySQL server earlier than version 4.1 would raise a NullException. (Bug#29476)

  • The availability of a MySQL server would not be reset when using pooled connections (pooling=true). This would lead to the server being reported as unavailable, even if the server become available while the application was still running. (Bug#29409)

  • A FormatException error would be raised if a parameter had not been found, instead of Resources.ParameterMustBeDefined. (Bug#29312)

  • An exception would be thrown when using the Manage Role functionality within the web administrator to assign a role to a user. (Bug#29236)

  • Using the membership/role providers when validationKey or decryptionKey parameters are set to AutoGenerate, an exception would be raised when accessing the corresponding values. (Bug#29235)

  • Certain operations would not check the UsageAdvisor setting, causing log messages from the Usage Advisor even when it was disabled. (Bug#29124)

  • Using the same connection string multiple times would result in Database=dbname appearing multiple times in the resulting string. (Bug#29123)

  • Visual Studio Plugin: Adding a new query based on a stored procedure that uses the SELECT statement would terminate the query/TableAdapter wizard. (Bug#29098)

  • Using TransactionScope would cause an InvalidOperationException. (Bug#28709)

C.4.4. Changes in MySQL Connector/NET 5.1.2 (18 June 2007)

This is a new Beta development release, fixing recently discovered bugs.

Bugs fixed:

  • Log messages would be truncated to 300 bytes. (Bug#28706)

  • Creating a user would fail due to the application name being set incorrectly. (Bug#28648)

  • Visual Studio Plugin: Adding a new query based on a stored procedure that used a UPDATE, INSERT or DELETE statement would terminate the query/TableAdapter wizard. (Bug#28536)

  • Visual Studio Plugin: Query Builder would fail to show TINYTEXT columns, and any columns listed after a TINYTEXT column correctly. (Bug#28437)

  • Accessing the results from a large query when using data compression in the connection would fail to return all the data. (Bug#28204)

  • Visual Studio Plugin: Update commands would not be generated correctly when using the TableAdapter wizard. (Bug#26347)

C.4.5. Changes in MySQL Connector/NET 5.1.1 (23 May 2007)

Bugs fixed:

  • Running the statement SHOW PROCESSLIST would return columns as byte arrays instead of native columns. (Bug#28448)

  • Installation of the Connector/NET on Windows would fail if VisualStudio had not already been installed. (Bug#28260)

  • Connector/NET would look for the wrong table when executing User.IsRole(). (Bug#28251)

  • Building a connection string within a tight loop would show slow peformance. (Bug#28167)

  • The UNSIGNED flag for parameters in a stored procedure would be ignored when using MySqlCommandBuilder to obtain the parameter information. (Bug#27679)

  • Using MySQLDataAdapter.FillSchema() on a stored procedure would raise an exception: Invalid attempt to access a field before calling Read(). (Bug#27668)

  • DATETIME fields from versions of MySQL bgefore 4.1 would be incorrectly parsed, resulting in a exception. (Bug#23342)

  • Fixed password property on MySqlConnectionStringBuilder to use PasswordPropertyText attribute. This causes dots to show instead of actual password text.

C.4.6. Changes in MySQL Connector/NET 5.1.0 (01 May 2007)

Functionality added or changed:

  • Now compiles for .NET CF 2.0.

  • Rewrote stored procedure parsing code using a new SQL tokenizer. Really nasty procedures including nested comments are now supported.

  • GetSchema will now report objects relative to the currently selected database. What this means is that passing in null as a database restriction will report objects on the currently selected database only.

  • Added Membership and Role provider contributed by Sean Wright (thanks!).

C.4.7. Changes in MySQL Connector/NET 5.0.9 (Not yet released)

Bugs fixed:

  • Setting the size of a string parameter after the value could cause an exception. (Bug#32094)

  • Creation of parameter objects with non-input direction using a constructor would fail. This was cause by some old legacy code preventing their use. (Bug#32093)

  • A date string could be returned incorrectly by MySqlDataTime.ToString() when the date returned by MySQL was 0000-00-00 00:00:00. (Bug#32010)

  • A syntax error in a set of batch statements could leave the data adapter in a state that appears hung. (Bug#31930)

  • Installing over a failed uninstall of a previous version could result in multiple clients being registered in the machine.config. This would prevent certain aspects of the MySQL connection within Visual Studio to work properly. (Bug#31731)

  • Data cached from the connection string could return invalid information because the internal routines were not using case-sensitive semantics. This lead to updated connection string options not being recognized if they were of a different case than the existing cached values. (Bug#31433)

  • Column name metadata was not using the character set as deifned within the connection string being used. (Bug#31185)

  • Memory usage could increase and decrease significantly when updating or inserting a large number of rows. (Bug#31090)

  • Commands executed from within the state change handeler would fail with a NULL exception. (Bug#30964)

  • When running a stored procedure multiple times on the same connection, the memory usage could increase indefinitely. (Bug#30116)

  • The server error code was not updated in the Data[] hash, which prevented DbProviderFactory users from accessing the server error code. (Bug#27436)

  • Changing the connection string of a connection to one that changes the parameter marker after the connection had been assigned to a command but before the connection is opened could cause parameters to not be found. (Bug#13991)

C.4.8. Changes in MySQL Connector/NET 5.0.8 (21 August 2007)

Note

This version introduces a new installer technology.

Bugs fixed:

  • Extracting data through XML functions within a query returns the data as System.Byte[]. This was due to Connector/NET incorrectly identifying BLOB fields as binary, rather than text. (Bug#30233)

  • An incorrect ConstraintException could be raised on an INSERT when adding rows to a table with a multiple-column unique key index. (Bug#30204)

  • A DATE field would be updated with a date/time value, causing a MySqlDataAdapter.Update() exception. (Bug#30077)

  • Fixed bug where Connector/Net was hand building some date time patterns rather than using the patterns provided under CultureInfo. This caused problems with some calendars that do not support the same ranges as Gregorian.. (Bug#29931)

  • Calling SHOW CREATE PROCEDURE for routines with a hyphen in the catalog name produced a syntax error. (Bug#29526)

  • The availability of a MySQL server would not be reset when using pooled connections (pooling=true). This would lead to the server being reported as unavailable, even if the server become available while the application was still running. (Bug#29409)

  • A FormatException error would be raised if a parameter had not been found, instead of Resources.ParameterMustBeDefined. (Bug#29312)

  • Certain operations would not check the UsageAdvisor setting, causing log messages from the Usage Advisor even when it was disabled. (Bug#29124)

  • Using the same connection string multiple times would result in Database=dbname appearing multiple times in the resulting string. (Bug#29123)

  • Log messages would be truncated to 300 bytes. (Bug#28706)

  • Accessing the results from a large query when using data compression in the connection will fail to return all the data. (Bug#28204)

  • Fixed problem where MySqlConnection.BeginTransaction checked the drivers status var before checking if the connection was open. The result was that the driver could report an invalid condition on a previously opened connection.

  • Fixed problem where we were not closing prepared statement handles when commands are disposed. This could lead to using up all prepared statement handles on the server.

  • Fixed the database schema collection so that it works on servers that are not properly respecting the lower_case_table_names setting.

  • Fixed problem where any attempt to not read all the records returned from a select where each row of the select is greater than 1024 bytes would hang the driver.

  • Fixed problem where a command timing out just after it actually finished would cause an exception to be thrown on the command timeout thread which would then be seen as an unhandled exception.

  • Fixed some serious issues with command timeout and cancel that could present as exceptions about thread ownership. The issue was that not all queries cancel the same. Some produce resultsets while others don't. ExecuteReader had to be changed to check for this.

C.4.9. Changes in MySQL Connector/NET 5.0.7 (18 May 2007)

Bugs fixed:

  • Running the statement SHOW PROCESSLIST would return columns as byte arrays instead of native columns. (Bug#28448)

  • Building a connection string within a tight loop would show slow peformance. (Bug#28167)

  • Using logging (with the logging=true parameter to the connection string) would not generate a log file. (Bug#27765)

  • The UNSIGNED flag for parameters in a stored procedure would be ignored when using MySqlCommandBuilder to obtain the parameter information. (Bug#27679)

  • Using MySQLDataAdapter.FillSchema() on a stored procedure would raise an exception: Invalid attempt to access a field before calling Read(). (Bug#27668)

  • If you close an open connection with an active transaction, the transaction is not automatically rolled back. (Bug#27289)

  • When cloning an open MySqlClient.MySqlConnection with the Persist Security Info=False option set, the cloned connection is not usable because the security information has not been cloned. (Bug#27269)

  • Enlisting a null transaction would affect the current connection object, such that further enlistment operations to the transaction are not possible. (Bug#26754)

  • Attempting to change the the Connection Protocol property within a PropertyGrid control would raise an exception. (Bug#26472)

  • The characterset property would not be identified during a connection (also affected Visual Studion Plugin). (Bug#26147, Bug#27240)

  • The CreateFormat column of the DataTypes collection did not contain a format specification for creating a new column type. (Bug#25947)

  • DATETIME fields from versions of MySQL bgefore 4.1 would be incorrectly parsed, resulting in a exception. (Bug#23342)

C.4.10. Changes in MySQL Connector/NET 5.0.6 (22 March 2007)

Bugs fixed:

  • Publisher listed in "Add/Remove Programs" is not consistent with other MySQL products. (Bug#27253)

  • DESCRIBE .... SQL statement returns byte arrays rather than data on MySQL versions older than 4.1.15. (Bug#27221)

  • cmd.Parameters.RemoveAt("Id") will cause an error if the last item is requested. (Bug#27187)

  • MySqlParameterCollection and parameters added with Insert method can not be retrieved later using ParameterName. (Bug#27135)

  • Exception thrown when using large values in UInt64 parameters. (Bug#27093)

  • MySQL Visual Studio Plugin 1.1.2 does not work with Connector/Net 5.0.5. (Bug#26960)

C.4.11. Changes in MySQL Connector/NET 5.0.5 (07 March 2007)

Functionality added or changed:

  • Reverted behavior that required parameter names to start with the parameter marker. We apologize for this back and forth but we mistakenly changed the behavior to not match what SqlClient supports. We now support using either syntax for adding parameters however we also respond exactly like SqlClient in that if you ask for the index of a parameter using a syntax different from when you added the parameter, the result will be -1.

  • Assembly now properly appears in the Visual Studio 2005 Add/Remove Reference dialog.

  • Fixed problem that prevented use of SchemaOnly or SingleRow command behaviors with stored procedures or prepared statements.

  • Added MySqlParameterCollection.AddWithValue and marked the Add(name, value) method as obsolete.

  • Return parameters created with DeriveParameters now have the name RETURN_VALUE.

  • Fixed problem with parameter name hashing where the hashes were not getting updated when parameters were removed from the collection.

  • Fixed problem with calling stored functions when a return parameter was not given.

  • Added Use Procedure Bodies connection string option to allow calling procedures without using procedure metadata.

Bugs fixed:

  • MySqlConnection.GetSchema fails with NullReferenceException for Foreign Keys. (Bug#26660)

  • Connector/NET would fail to install under Windows Vista. (Bug#26430)

  • Opening a connection would be slow due to hostname lookup. (Bug#26152)

  • Incorrect values/formats would be applied when the OldSyntax connection string option was used. (Bug#25950)

  • Registry would be incorrectly populated with installation locations. (Bug#25928)

  • Times with negative values would be returned incorrectly. (Bug#25912)

  • Returned data types of a DataTypes collection do not contain the right correctl CLR Datatype. (Bug#25907)

  • GetSchema and DataTypes would throw an exception due to an incorrect table name. (Bug#25906)

  • MySqlConnection throws an exception when connecting to MySQL v4.1.7. (Bug#25726)

  • SELECT did not work correctly when using a WHERE clause containing a UTF-8 string. (Bug#25651)

  • When closing and then re-opening a connection to a database, the character set specification is lost. (Bug#25614)

  • Filling a table schema through a stored procedure triggers a runtime error. (Bug#25609)

  • BINARY and VARBINARY columns would be returned as a string, not binary, datatype. (Bug#25605)

  • A critical ConnectionPool error would result in repeated System.NullReferenceException. (Bug#25603)

  • The UpdateRowSource.FirstReturnedRecord method does not work. (Bug#25569)

  • When connecting to a MySQL Server earlier than version 4.1, the connection would hang when reading data. (Bug#25458)

  • Using ExecuteScalar() with more than one query, where one query fails, will hang the connection. (Bug#25443)

  • When a MySqlConversionException is raised on a remote object, the client application would receive a SerializationException instead. (Bug#24957)

  • When connecting to a server, the return code from the connection could be zero, even though the hostname was incorrect. (Bug#24802)

  • High CPU utilization would be experienced when there is no idle connection waiting when using pooled connections through MySqlPool.GetConnection. (Bug#24373)

  • Connector/NET would not compile properly when used with Mono 1.2. (Bug#24263)

  • Applications would crash when calling with CommandType set to StoredProcedure.

C.4.12. Changes in MySQL Connector/NET 5.0.4 (Not released)

This is a new Beta development release, fixing recently discovered bugs.

C.4.13. Changes in MySQL Connector/NET 5.0.3 (05 January 2007)

Functionality added or changed:

  • Usage Advisor has been implemented. The Usage Advisor checks your queries and will report if you are using the connection inefficiently.

  • PerfMon hooks have been added to monitor the stored procedure cache hits and misses.

  • The MySqlCommand object now supports asynchronous query methods. This is implemented useg the BeginExecuteNonQuery and EndExecuteNonQuery methods.

  • Metadata from storaed procedures and stored function execution are cached.

  • The CommandBuilder.DeriveParameters function has been updated to the procedure cache.

  • The ViewColumns GetSchema collection has been updated.

  • Improved speed and performance by re-architecting certain sections of the code.

  • Support for the embedded server and client library have been removed from this release. Support will be added back to a later release.

  • The ShapZipLib library has been replaced with the deflate support provided within .NET 2.0.

  • SSL support has been updated.

Bugs fixed:

  • Additional text added to error message (Bug#25178)

  • An exception would be raised, or the process would hang, if SELECT privileges on a database were not granted and a stored procedure was used. (Bug#25033)

  • When adding parameter objects to a command object, if the parameter direction is set to ReturnValue before the parameter is added to the command object then when the command is executed it throws an error. (Bug#25013)

  • Using Driver.IsTooOld() would return the wrong value. (Bug#24661)

  • When using a DbNull.Value as the value for a parameter value, and then later setting a specific value type, the command would fail with an exception because the wrong type was implied from the DbNull.Value. (Bug#24565)

  • Stored procedure executions are not thread safe. (Bug#23905)

  • Deleting a connection to a disconnected server when using the Visual Studio Plugin would cause an assertion failure. (Bug#23687)

  • Nested transactions (which are unsupported)do not raise an error or warning. (Bug#22400)

C.4.14. Changes in MySQL Connector/NET 5.0.2 (06 November 2006)

Functionality added or changed:

  • An Ignore Prepare option has been added to the connection string options. If enabled, prepared statements will be disabled application-wide. The default for this option is true.

  • Implemented a stored procedure cache. By default, the connector caches the metadata for the last 25 procedures that are seen. You can change the numbver of procedures that are cacheds by using the procedure cache connection string.

  • Important change: Due to a number of issues with the use of server-side prepared statements, Connector/NET 5.0.2 has disabled their use by default. The disabling of server-side prepared statements does not affect the operation of the connector in any way.

    To enable server-side prepared statements you must add the following configuration property to your connector string properties:

    ignore prepare=false

    The default value of this property is true.

Bugs fixed:

  • One system where IPv6 was enabled, Connector/NET would incorrectly resolve hostnames. (Bug#23758)

  • Column names with accented characters were not parsed properly causing malformed column names in result sets. (Bug#23657)

  • An exception would be thrown when calling GetSchemaTable and fields was null. (Bug#23538)

  • A System.FormatException exception would be raised when invoking a stored procedure with an ENUM input parameter. (Bug#23268)

  • During installation, an antivirus error message would be raised (indicating a malicious script problem). (Bug#23245)

  • Creating a connection through the Server Explorer when using the Visual Studio Plugin would fail. The installer for the Visual Studio Plugin has been updated to ensure that Connector/NET 5.0.2 must be installed. (Bug#23071)

  • Using Windows Vista (RC2) as a non-privileged user would raise a Registry key 'Global' access denied. (Bug#22882)

  • Within Mono, using the PreparedStatement interface could result in an error due to a BitArray copying error. (Bug#18186)

  • Connector/NET did not work as a data source for the SqlDataSource object used by ASP.NET 2.0. (Bug#16126)

C.4.15. Changes in MySQL Connector/NET 5.0.1 (01 October 2006)

Bugs fixed:

  • Connector/NET on a Tukish operating system, may fail to execute certain SQL statements correctly. (Bug#22452)

  • Starting a transaction on a connection created by MySql.Data.MySqlClient.MySqlClientFactory, using BeginTransaction without specifying an isolation level, causes the SQL statement to fail with a syntax error. (Bug#22042)

  • The MySqlexception class is now derived from the DbException class. (Bug#21874)

  • The # would not be accepted within column/table names, even though it was valid. (Bug#21521)

  • You can now install the Connector/NET MSI package from the command line using the /passive, /quiet, /q options. (Bug#19994)

  • Submitting an empty string to a command object through prepare raises an System.IndexOutOfRangeException, rather than a Connector/Net exception. (Bug#18391)

  • Using ExecuteScalar with a datetime field, where the value of the field is "0000-00-00 00:00:00", a MySqlConversionException exception would be raised. (Bug#11991)

  • An MySql.Data.Types.MySqlConversionException would be raised when trying to update a row that contained a date field, where the date field contained a zero value (0000-00-00 00:00:00). (Bug#9619)

  • Executing multiple queries as part of a transaction returns There is already an openDataReader associated with this Connection which must be closed first. (Bug#7248)

  • Incorrect field/data lengths could be returned for VARCHAR UTF8 columns. Bug (#14592)

C.4.16. Changes in MySQL Connector/NET 5.0.0 (08 August 2006)

Functionality added or changed:

  • Replaced use of ICSharpCode with .NET 2.0 internal deflate support.

  • Refactored test suite to test all protocols in a single pass.

  • Added usage advisor warnings for requesting column values by the wrong type.

  • Reimplemented PacketReader/PacketWriter support into MySqlStream class.

  • Reworked connection string classes to be simpler and faster.

  • Added procedure metadata caching.

  • Added internal implemention of SHA1 so we don't have to distribute the OpenNetCF on mobile devices.

  • Implemented MySqlClientFactory class.

  • Added perfmon hooks for stored procedure cache hits and misses.

  • Implemented classes and interfaces for ADO.Net 2.0 support.

  • Added Async query methods.

  • Implemented Usage Advisor.

  • Completely refactored how column values are handled to avoid boxing in some cases.

  • Implemented MySqlConnectionBuilder class.

Bugs fixed:

  • CommandText: Question mark in comment line is being parsed as a parameter. (Bug#6214)

C.4.17. Changes in MySQL Connector/NET 1.0.11 (Not yet released)

Bugs fixed:

  • Setting the size of a string parameter after the value could cause an exception. (Bug#32094)

  • Creation of parameter objects with non-input direction using a constructor would fail. This was cause by some old legacy code preventing their use. (Bug#32093)

  • Memory usage could increase and decrease significantly when updating or inserting a large number of rows. (Bug#31090)

  • Commands executed from within the state change handeler would fail with a NULL exception. (Bug#30964)

  • Extracting data through XML functions within a query returns the data as System.Byte[]. This was due to Connector/NET incorrectly identifying BLOB fields as binary, rather than text. (Bug#30233)

  • Using compression in the MySQL connection with Connector/NET would be slower than using native (uncompressed) communication. (Bug#27865)

  • Changing the connection string of a connection to one that changes the parameter marker after the connection had been assigned to a command but before the connection is opened could cause parameters to not be found. (Bug#13991)

C.4.18. Changes in MySQL Connector/NET 1.0.10 (24 August 2007)

Bugs fixed:

  • An incorrect ConstraintException could be raised on an INSERT when adding rows to a table with a multiple-column unique key index. (Bug#30204)

  • The availability of a MySQL server would not be reset when using pooled connections (pooling=true). This would lead to the server being reported as unavailable, even if the server become available while the application was still running. (Bug#29409)

  • Publisher listed in "Add/Remove Programs" is not consistent with other MySQL products. (Bug#27253)

  • MySqlParameterCollection and parameters added with Insert method can not be retrieved later using ParameterName. (Bug#27135)

  • BINARY and VARBINARY columns would be returned as a string, not binary, datatype. (Bug#25605)

  • A critical ConnectionPool error would result in repeated System.NullReferenceException. (Bug#25603)

  • When a MySqlConversionException is raised on a remote object, the client application would receive a SerializationException instead. (Bug#24957)

  • High CPU utilization would be experienced when there is no idle connection waiting when using pooled connections through MySqlPool.GetConnection. (Bug#24373)

C.4.19. Changes in MySQL Connector/NET 1.0.9 (02 February 2007)

Functionality added or changed:

  • The ICSharpCode ZipLib is no longer used by the Connector, and is no longer distributed with it.

  • Important change: Binaries for .NET 1.0 are no longer supplied with this release. If you need support for .NET 1.0, you must build from source.

  • Improved CommandBuilder.DeriveParameters to first try and use the procedure cache before querying for the stored procedure metadata. Return parameters created with DeriveParameters now have the name RETURN_VALUE.

  • An Ignore Prepare option has been added to the connection string options. If enabled, prepared statements will be disabled application-wide. The default for this option is true.

  • Implemented a stored procedure cache. By default, the connector caches the metadata for the last 25 procedures that are seen. You can change the numbver of procedures that are cacheds by using the procedure cache connection string.

  • Important change: Due to a number of issues with the use of server-side prepared statements, Connector/NET 5.0.2 has disabled their use by default. The disabling of server-side prepared statements does not affect the operation of the connector in any way.

    To enable server-side prepared statements you must add the following configuration property to your connector string properties:

    ignore prepare=false

    The default value of this property is true.

Bugs fixed:

  • Times with negative values would be returned incorrectly. (Bug#25912)

  • MySqlConnection throws a NullReferenceException and ArgumentNullException when connecting to MySQL v4.1.7. (Bug#25726)

  • SELECT did not work correctly when using a WHERE clause containing a UTF-8 string. (Bug#25651)

  • When closing and then re-opening a connection to a database, the character set specification is lost. (Bug#25614)

  • Trying to fill a table schema through a stored procedure triggers a runtime error. (Bug#25609)

  • Using ExecuteScalar() with more than one query, where one query fails, will hang the connection. (Bug#25443)

  • Additional text added to error message. (Bug#25178)

  • When adding parameter objects to a command object, if the parameter direction is set to ReturnValue before the parameter is added to the command object then when the command is executed it throws an error. (Bug#25013)

  • When connecting to a server, the return code from the connection could be zero, even though the hostname was incorrect. (Bug#24802)

  • Using Driver.IsTooOld() would return the wrong value. (Bug#24661)

  • When using a DbNull.Value as the value for a parameter value, and then later setting a specific value type, the command would fail with an exception because the wrong type was implied from the DbNull.Value. (Bug#24565)

  • Stored procedure executions are not thread safe. (Bug#23905)

  • The CommandBuilder would mistakenly add insert parameters for a table column with auto incrementation enabled. (Bug#23862)

  • One system where IPv6 was enabled, Connector/NET would incorrectly resolve hostnames. (Bug#23758)

  • Nested transactions do not raise an error or warning. (Bug#22400)

  • An System.OverflowException would be raised when accessing a varchar field over 255 bytes. Bug (#23749)

  • Within Mono, using the PreparedStatement interface could result in an error due to a BitArray copying error. (Bug 18186)

C.4.20. Changes in MySQL Connector/NET 1.0.8 (20 October 2006)

Functionality added or changed:

  • Stored procedures are now cached.

  • The method for retrieving stored procedured metadata has been changed so that users without SELECT privileges on the mysql.proc table can use a stored procedure.

Bugs fixed:

  • Connector/NET on a Tukish operating system, may fail to execute certain SQL statements correctly. (Bug#22452)

  • The # would not be accepted within column/table names, even though it was valid. (Bug#21521)

  • Calling Close on a connection after calling a stored procedure would trigger a NullReferenceException. (Bug#20581)

  • You can now install the Connector/NET MSI package from the command line using the /passive, /quiet, /q options. (Bug#19994)

  • The DiscoverParameters function would fail when a stored procedure used a NUMERIC parameter type. (Bug#19515)

  • When running a query that included a date comparison, a DateReader error would be raised. (Bug#19481)

  • IDataRecord.GetString would raise NullPointerException for null values in returned rows. Method now throws SqlNullValueException. (Bug#19294)

  • Parameter substitution in queries where the order of parameters and table fields did not match would substitute incorrect values. (Bug#19261)

  • Submitting an empty string to a command object through prepare raises an System.IndexOutOfRangeException, rather than a Connector/Net exception. (Bug#18391)

  • An exception would be raised when using an output parameter to a System.String value. (Bug#17814)

  • CHAR type added to MySqlDbType. (Bug#17749)

  • A SELECT query on a table with a date with a value of '0000-00-00' would hang the application. (Bug#17736)

  • The CommandBuilder ignored Unsigned flag at Parameter creation. (Bug#17375)

  • When working with multiple threads, character set initialization would generate errors. (Bug#17106)

  • When using an unsigned 64-bit integer in a stored procedure, the unsigned bit would be lost stored. (Bug#16934)

  • DataReader would show the value of the previous row (or last row with non-null data) if the current row contained a datetime field with a null value. (Bug#16884)

  • Unsigned data types were not properly supported. (Bug#16788)

  • The connection string parser did not allow single or double quotes in the password. (Bug#16659)

  • The MySqlDateTime class did not contain constructors. (Bug#15112)

  • Called MySqlCommandBuilder.DeriveParameters for a stored procedure that has no paramers would cause an application crash. (Bug#15077)

  • Using ExecuteScalar with a datetime field, where the value of the field is "0000-00-00 00:00:00", a MySqlConversionException exception would be raised. (Bug#11991)

  • An MySql.Data.Types.MySqlConversionException would be raised when trying to update a row that contained a date field, where the date field contained a zero value (0000-00-00 00:00:00). (Bug#9619)

  • When using MySqlDataAdapter, connections to a MySQL server may remain open and active, even though the use of the connection has been completed and the data received. (Bug#8131)

  • Executing multiple queries as part of a transaction returns There is already an openDataReader associated with this Connection which must be closed first. (Bug#7248)

  • Incorrect field/data lengths could be returned for VARCHAR UTF8 columns. Bug (#14592)

C.4.21. Changes in MySQL Connector/NET 1.0.7 (21 November 2005)

Bugs fixed:

  • Unsigned tinyint (NET byte) would lead to and incorrectly determined parameter type from the parameter value. (Bug#18570)

  • A #42000Query was empty exception occurred when executing a query built with MySqlCommandBuilder, if the query string ended with a semicolon. (Bug#14631)

  • The parameter collection object's Add() method added parameters to the list without first checking to see whether they already existed. Now it updates the value of the existing parameter object if it exists. (Bug#13927)

  • Added support for the cp932 character set. (Bug#13806)

  • Calling a stored procedure where a parameter contained special characters (such as '@') would produce an exception. Note that ANSI_QUOTES had to be enabled to make this possible. (Bug#13753)

  • The Ping() method did not update the State property of the Connection object. (Bug#13658)

  • Implemented the MySqlCommandBuilder.DeriveParameters method that is used to discover the parameters for a stored procedure. (Bug#13632)

  • A statement that contained multiple references to the same parameter could not be prepared. (Bug#13541)

C.4.22. Changes in MySQL Connector/NET 1.0.6 (03 October 2005)

Bugs fixed:

  • Connector/NET 1.0.5 could not connect on Mono. (Bug#13345)

  • Serializing a parameter failed if the first value passed in was NULL. (Bug#13276)

  • Field names that contained the following characters caused errors: ()%<>/ (Bug#13036)

  • The nant build sequence had problems. (Bug#12978)

  • The Connector/NET 1.0.5 installer would not install alongside Connector/NET 1.0.4. (Bug#12835)

C.4.23. Changes in MySQL Connector/NET 1.0.5 (29 August 2005)

Bugs fixed:

  • Connector/NET could not connect to MySQL 4.1.14. (Bug#12771)

  • With multiple hosts in the connection string, Connector/NET would not connect to the last host in the list. (Bug#12628)

  • The ConnectionString property could not be set when a MySqlConnection object was added with the designer. (Bug#12551, Bug#8724)

  • The cp1250 character set was not supported. (Bug#11621)

  • A call to a stored procedure caused an exception if the stored procedure had no parameters. (Bug#11542)

  • Certain malformed queries would trigger a Connection must be valid and open error message. (Bug#11490)

  • Trying to use a stored procedure when Connection.Database was not populated generated an exception. (Bug#11450)

  • Connector/NET interpreted the new decimal data type as a byte array. (Bug#11294)

  • Added support to call a stored function from Connector/NET. (Bug#10644)

  • Connection could fail when .NET thread pool had no available worker threads. (Bug#10637)

  • Calling MySqlConnection.clone when a connection string had not yet been set on the original connection would generate an error. (Bug#10281)

  • Decimal parameters caused syntax errors. (Bug#10152, Bug#11550, Bug#10486)

  • Parameters were not recognized when they were separated by linefeeds. (Bug#9722)

  • The MySqlCommandBuilder class could not handle queries that referenced tables in a database other than the default database. (Bug#8382)

  • Trying to read a TIMESTAMP column generated an exception. (Bug#7951)

  • Connector/NET could not work properly with certain regional settings. (WL#8228)

C.4.24. Changes in MySQL Connector/NET 1.0.4 (20 January 2005)

Bugs fixed:

  • MySqlReader.GetInt32 throws exception if column is unsigned. (Bug#7755)

  • Quote character \222 not quoted in EscapeString. (Bug#7724)

  • GetBytes is working no more. (Bug#7704)

  • MySqlDataReader.GetString(index) returns non-Null value when field is Null. (Bug#7612)

  • Clone method bug in MySqlCommand. (Bug#7478)

  • Problem with Multiple resultsets. (Bug#7436)

  • MySqlAdapter.Fill method throws error message Non-negative number required. (Bug#7345)

  • MySqlCommand.Connection returns an IDbConnection. (Bug#7258)

  • Calling prepare causing exception. (Bug#7243)

  • Fixed problem with shared memory connections.

  • Added or filled out several more topics in the API reference documentation.

  • Fixed another small problem with prepared statements.

  • Fixed problem that causes named pipes to not work with some blob functionality.

C.4.25. Changes in MySQL Connector/NET 1.0.3 (12 October 2004)

Bugs fixed:

  • Invalid query string when using inout parameters (Bug#7133)

  • Inserting DateTime causes System.InvalidCastException to be thrown. (Bug#7132)

  • MySqlDateTime in Datatables sorting by Text, not Date. (Bug#7032)

  • Exception stack trace lost when re-throwing exceptions. (Bug#6983)

  • Errors in parsing stored procedure parameters. (Bug#6902)

  • InvalidCast when using DATE_ADD-function. (Bug#6879)

  • Int64 Support in MySqlCommand Parameters. (Bug#6863)

  • Test suite fails with MySQL 4.0 because of case sensitivity of table names. (Bug#6831)

  • MySqlDataReader.GetChar(int i) throws IndexOutOfRange exception. (Bug#6770)

  • Integer "out" parameter from stored procedure returned as string. (Bug#6668)

  • An Open Connection has been Closed by the Host System. (Bug#6634)

  • Fixed Invalid character set index: 200. (Bug#6547)

  • Connections now do not have to give a database on the connection string.

  • Installer now includes options to install into GAC and create Start Menu items.

  • Fixed major problem with detecting null values when using prepared statements.

  • Fixed problem where multiple resultsets having different numbers of columns would cause a problem.

  • Added ServerThread property to MySqlConnection to expose server thread id.

  • Added Ping method to MySqlConnection.

  • Changed the name of the test suite to MySql.Data.Tests.dll.

  • Now SHOW COLLATION is used upon connection to retrieve the full list of charset ids.

  • Made MySQL the default named pipe name.

C.4.26. Changes in MySQL Connector/NET 1.0.2 (15 November 2004)

Bugs fixed:

  • Fixed Objects not being disposed (Bug#6649)

  • Fixed Charset-map for UCS-2 (Bug#6541)

  • Fixed Zero date "0000-00-00" is returned wrong when filling Dataset (Bug#6429)

  • Fixed double type handling in MySqlParameter(string parameterName, object value) (Bug#6428)

  • Fixed Installation directory ignored using custom installation (Bug#6329)

  • Fixed #HY000 Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ (Bug#6322)

  • Added the TableEditor CS and VB sample

  • Added charset connection string option

  • Fixed problem with MySqlBinary where string values could not be used to update extended text columns

  • Provider is now using character set specified by server as default

  • Updated the installer to include the new samples

  • Fixed problem where setting command text leaves the command in a prepared state

  • Fixed Long inserts take very long time (Bu #5453)

  • Fixed problem where calling stored procedures might cause an "Illegal mix of collations" problem.

C.4.27. Changes in MySQL Connector/NET 1.0.1 (27 October 2004)

Bugs fixed:

  • Fixed IndexOutOfBounds when reading BLOB with DataReader with GetString(index) (Bug#6230)

  • Fixed GetBoolean returns wrong values (Bug#6227)

  • Fixed Method TokenizeSql() uses only a limited set of valid characters for parameters (Bug#6217)

  • Fixed NET Connector source missing resx files (Bug#6216)

  • Fixed System.OverflowException when using YEAR datatype (Bug#6036)

  • Fixed MySqlDateTime sets IsZero property on all subseq.records after first zero found (Bug#6006)

  • Fixed serializing of floating point parameters (double, numeric, single, decimal) (Bug#5900)

  • Fixed missing Reference in DbType setter (Bug#5897)

  • Fixed Parsing the ';' char (Bug#5876)

  • Fixed DBNull Values causing problems with retrieving/updating queries. (Bug#5798)

  • IsNullable error (Bug#5796)

  • Fixed problem where MySqlParameterCollection.Add() would throw unclear exception when given a null value (Bug#5621)

  • Fixed construtor initialize problems in MySqlCommand() (Bug#5613)

  • Fixed Yet Another "object reference not set to an instance of an object" (Bug#5496)

  • Fixed Can't display Chinese correctly (Bug#5288)

  • Fixed MySqlDataReader and 'show tables from ...' behavior (Bug#5256)

  • Fixed problem in PacketReader where it could try to allocate the wrong buffer size in EnsureCapacity

  • Fixed problem where using old syntax while using the interfaces caused problems

  • Fixed Bug#5458 Calling GetChars on a longtext column throws an exception

  • Added test case for resetting the command text on a prepared command

  • Fixed Bug#5388 DataReader reports all rows as NULL if one row is NULL

  • Fixed problem where connection lifetime on the connect string was not being respected

  • Fixed Bug#5602 Possible bug in MySqlParameter(string, object) constructor

  • Field buffers being reused to decrease memory allocations and increase speed

  • Fixed Bug#5392 MySqlCommand sees "?" as parameters in string literals

  • Added Aggregate function test (wasn't really a bug)

  • Using PacketWriter instead of Packet for writing to streams

  • Implemented SequentialAccess

  • Fixed problem with ConnectionInternal where a key might be added more than once

  • Fixed Russian character support as well

  • Fixed Bug#5474 cannot run a stored procedure populating mysqlcommand.parameters

  • Fixed problem where connector was not issuing a CMD_QUIT before closing the socket

  • Fixed problem where Min Pool Size was not being respected

  • Refactored compression code into CompressedStream to clean up NativeDriver

  • CP1252 is now used for Latin1 only when the server is 4.1.2 and later

  • Fixed Bug#5469 Setting DbType throws NullReferenceException

  • Virtualized driver subsystem so future releases could easily support client or embedded server support

C.4.28. Changes in MySQL Connector/NET 1.0.0 (01 September 2004)

Bugs fixed:

  • Thai encoding not correctly supported. (Bug#3889)

  • Bumped version number to 1.0.0 for beta 1 release.

  • Removed all of the XML comment warnings.

  • Added COPYING.rtf file for use in installer.

  • Updated many of the test cases.

  • Fixed problem with using compression.

  • Removed some last references to ByteFX.

C.4.29. Changes in MySQL Connector/NET Version 0.9.0 (30 August 2004)

  • Added test fixture for prepared statements.

  • All type classes now implement a SerializeBinary method for sending their data to a PacketWriter.

  • Added PacketWriter class that will enable future low-memory large object handling.

  • Fixed many small bugs in running prepared statements and stored procedures.

  • Changed command so that an exception will not be thrown in executing a stored procedure with parameters in old syntax mode.

  • SingleRow behavior now working right even with limit.

  • GetBytes now only works on binary columns.

  • Logger now truncates long sql commands so blob columns don't blow out our log.

  • host and database now have a default value of "" unless otherwise set.

  • Connection Timeout seems to be ignored. (Bug#5214)

  • Added test case for bug# 5051: GetSchema not working correctly.

  • Fixed problem where GetSchema would return false for IsUnique when the column is key.

  • MySqlDataReader GetXXX methods now using the field level MySqlValue object and not performing conversions.

  • DataReader returning NULL for time column. (Bug#5097)

  • Added test case for LOAD DATA LOCAL INFILE.

  • Added replacetext custom nant task.

  • Added CommandBuilderTest fixture.

  • Added Last One Wins feature to CommandBuilder.

  • Fixed persist security info case problem.

  • Fixed GetBool so that 1, true, "true", and "yes" all count as true.

  • Make parameter mark configurable.

  • Added the "old syntax" connection string parameter to allow use of @ parameter marker.

  • MySqlCommandBuilder. (Bug#4658)

  • ByteFX.MySqlClient caches passwords if Persist Security Info is false. (Bug#4864)

  • Updated license banner in all source files to include FLOSS exception.

  • Added new .Types namespace and implementations for most current MySql types.

  • Added MySqlField41 as a subclass of MySqlField.

  • Changed many classes to now use the new .Types types.

  • Changed type enum int to Int32, short to Int16, and bigint to Int64.

  • Added dummy types UInt16, UInt32, and UInt64 to allow an unsigned parameter to be made.

  • Connections are now reset when they are pulled from the connection pool.

  • Refactored auth code in driver so it can be used for both auth and reset.

  • Added UserReset test in PoolingTests.cs.

  • Connections are now reset using COM_CHANGE_USER when pulled from the pool.

  • Implemented SingleResultSet behavior.

  • Implemented support of unicode.

  • Added char set mappings for utf-8 and ucs-2.

  • Time fields overflow using bytefx .net mysql driver (Bug#4520)

  • Modified time test in data type test fixture to check for time spans where hours > 24.

  • Wrong string with backslash escaping in ByteFx.Data.MySqlClient.MySqlParameter. (Bug#4505)

  • Added code to Parameter test case TestQuoting to test for backslashes.

  • MySqlCommandBuilder fails with multi-word column names. (Bug#4486)

  • Fixed bug in TokenizeSql where underscore would terminate character capture in parameter name.

  • Added test case for spaces in column names.

  • MySqlDataReader.GetBytes don't works correctly. (Bug#4324)

  • Added GetBytes() test case to DataReader test fixture.

  • Now reading all server variables in InternalConnection.Configure into Hashtable.

  • Now using string[] for index map in CharSetMap.

  • Added CRInSQL test case for carriage returns in SQL.

  • Setting maxPacketSize to default value in Driver.ctor.

  • Setting MySqlDbType on a parameter doesn't set generic type. (Bug#4442)

  • Removed obsolete data types Long and LongLong.

  • Overflow exception thrown when using "use pipe" on connection string. (Bug#4071)

  • Changed "use pipe" keyword to "pipe name" or just "pipe".

  • Allow reading multiple resultsets from a single query.

  • Added flags attribute to ServerStatusFlags enum.

  • Changed name of ServerStatus enum to ServerStatusFlags.

  • Inserted data row doesn't update properly.

  • Error processing show create table. (Bug#4074)

  • Change Packet.ReadLenInteger to ReadPackedLong and added packet.ReadPackedInteger that always reads integers packed with 2,3,4.

  • Added syntax.cs test fixture to test various SQL syntax bugs.

  • Improper handling of time values. Now time value of 00:00:00 is not treated as null. (Bug#4149)

  • Moved all test suite files into TestSuite folder.

  • Fixed bug where null column would move the result packet pointer backward.

  • Added new nant build script.

  • Clear tablename so it will be regen'ed properly during the next GenerateSchema. (Bug#3917)

  • GetValues was always returning zero and was also always trying to copy all fields rather than respecting the size of the array passed in. (Bug#3915)

  • Implemented shared memory access protocol.

  • Implemented prepared statements for MySQL 4.1.

  • Implemented stored procedures for MySQL 5.0.

  • Renamed MySqlInternalConnection to InternalConnection.

  • SQL is now parsed as chars, fixes problems with other languages.

  • Added logging and allow batch connection string options.

  • RowUpdating event not set when setting the DataAdapter property. (Bug#3888)

  • Fixed bug in char set mapping.

  • Implemented 4.1 authentication.

  • Improved open/auth code in driver.

  • Improved how connection bits are set during connection.

  • Database name is now passed to server during initial handshake.

  • Changed namespace for client to MySql.Data.MySqlClient.

  • Changed assembly name of client to MySql.Data.dll.

  • Changed license text in all source files to GPL.

  • Added the MySqlClient.build Nant file.

  • Removed the mono batch files.

  • Moved some of the unused files into notused folder so nant build file can use wildcards.

  • Implemented shared memory access.

  • Major revamp in code structure.

  • Prepared statements now working for MySql 4.1.1 and later.

  • Finished implementing auth for 4.0, 4.1.0, and 4.1.1.

  • Changed namespace from MySQL.Data.MySQLClient back to MySql.Data.MySqlClient.

  • Fixed bug in CharSetMapping where it was trying to use text names as ints.

  • Changed namespace to MySQL.Data.MySQLClient.

  • Integrated auth changes from UC2004.

  • Fixed bug where calling any of the GetXXX methods on a datareader before or after reading data would not throw the appropriate exception (thanks Luca Morelli).

  • Added TimeSpan code in parameter.cs to properly serialize a timespan object to mysql time format (thanks Gianluca Colombo).

  • Added TimeStamp to parameter serialization code. Prevented DataAdatper updates from working right (thanks Michael King).

  • Fixed a misspelling in MySqlHelper.cs (thanks Patrick Kristiansen).

C.4.30. Changes in MySQL Connector/NET Version 0.76

  • Driver now using charset number given in handshake to create encoding.

  • Changed command editor to point to MySqlClient.Design.

  • Fixed bug in Version.isAtLeast.

  • Changed DBConnectionString to support changes done to MySqlConnectionString.

  • Removed SqlCommandEditor and DataAdapterPreviewDialog.

  • Using new long return values in many places.

  • Integrated new CompressedStream class.

  • Changed ConnectionString and added attributes to allow it to be used in MySqlClient.Design.

  • Changed packet.cs to support newer lengths in ReadLenInteger.

  • Changed other classes to use new properties and fields of MySqlConnectionString.

  • ConnectionInternal is now using PING to see whether the server is alive.

  • Moved toolbox bitmaps into resource folder.

  • Changed field.cs to allow values to come directly from row buffer.

  • Changed to use the new driver.Send syntax.

  • Using a new packet queueing system.

  • Started work handling the "broken" compression packet handling.

  • Fixed bug in StreamCreator where failure to connect to a host would continue to loop infinitly (thanks Kevin Casella).

  • Improved connectstring handling.

  • Moved designers into Pro product.

  • Removed some old commented out code from command.cs.

  • Fixed a problem with compression.

  • Fixed connection object where an exception throw prior to the connection opening would not leave the connection in the connecting state (thanks Chris Cline).

  • Added GUID support.

  • Fixed sequence out of order bug (thanks Mark Reay).

C.4.31. Changes in MySQL Connector/NET Version 0.75

  • Enum values now supported as parameter values (thanks Philipp Sumi).

  • Year datatype now supported.

  • Fixed compression.

  • Fixed bug where a parameter with a TimeSpan as the value would not serialize properly.

  • Fixed bug where default constructor would not set default connection string values.

  • Added some XML comments to some members.

  • Work to fix/improve compression handling.

  • Improved ConnectionString handling so that it better matches the standard set by SqlClient.

  • A MySqlException is now thrown if a username is not included in the connection string.

  • Localhost is now used as the default if not specified on the connection string.

  • An exception is now thrown if an attempt is made to set the connection string while the connection is open.

  • Small changes to ConnectionString docs.

  • Removed MultiHostStream and MySqlStream. Replaced it with Common/StreamCreator.

  • Added support for Use Pipe connection string value.

  • Added Platform class for easier access to platform utility functions.

  • Fixed small pooling bug where new connection was not getting created after IsAlive fails.

  • Added Platform.cs and StreamCreator.cs.

  • Fixed Field.cs to properly handle 4.1 style timestamps.

  • Changed Common.Version to Common.DBVersion to avoid name conflict.

  • Fixed field.cs so that text columns return the right field type.

  • Added MySqlError class to provide some reference for error codes (thanks Geert Veenstra).

C.4.32. Changes in MySQL Connector/NET Version 0.74

  • Added Unix socket support (thanks Mohammad DAMT).

  • Only calling Thread.Sleep when no data is available.

  • Improved escaping of quote characters in parameter data.

  • Removed misleading comments from parameter.cs.

  • Fixed pooling bug.

  • Fixed ConnectionString editor dialog (thanks marco p (pomarc)).

  • UserId now supported in connection strings (thanks Jeff Neeley).

  • Attempting to create a parameter that is not input throws an exception (thanks Ryan Gregg).

  • Added much documentation.

  • Checked in new MultiHostStream capability. Big thanks to Dan Guisinger for this. he originally submitted the code and idea of supporting multiple machines on the connect string.

  • Added a lot of documentation.

  • Fixed speed issue with 0.73.

  • Changed to Thread.Sleep(0) in MySqlDataStream to help optimize the case where it doesn't need to wait (thanks Todd German).

  • Prepopulating the idlepools to MinPoolSize.

  • Fixed MySqlPool deadlock condition as well as stupid bug where CreateNewPooledConnection was not ever adding new connections to the pool. Also fixed MySqlStream.ReadBytes and ReadByte to not use TicksPerSecond which does not appear to always be right. (thanks Matthew J. Peddlesden)

  • Fix for precision and scale (thanks Matthew J. Peddlesden).

  • Added Thread.Sleep(1) to stream reading methods to be more cpu friendly (thanks Sean McGinnis).

  • Fixed problem where ExecuteReader would sometime return null (thanks Lloyd Dupont).

  • Fixed major bug with null field handling (thanks Naucki).

  • Enclosed queries for max_allowed_packet and characterset inside try catch (and set defaults).

  • Fixed problem where socket was not getting closed properly (thanks Steve!).

  • Fixed problem where ExecuteNonQuery was not always returning the right value.

  • Fixed InternalConnection to not use @@session.max_allowed_packet but use @@max_allowed_packet. (Thanks Miguel)

  • Added many new XML doc lines.

  • Fixed sql parsing to not send empty queries (thanks Rory).

  • Fixed problem where the reader was not unpeeking the packet on close.

  • Fixed problem where user variables were not being handled (thanks Sami Vaaraniemi).

  • Fixed loop checking in the MySqlPool (thanks Steve M. Brown)

  • Fixed ParameterCollection.Add method to match SqlClient (thanks Joshua Mouch).

  • Fixed ConnectionString parsing to handle no and yes for boolean and not lowercase values (thanks Naucki).

  • Added InternalConnection class, changes to pooling.

  • Implemented Persist Security Info.

  • Added security.cs and version.cs to project

  • Fixed DateTime handling in Parameter.cs (thanks Burkhard Perkens-Golomb).

  • Fixed parameter serialization where some types would throw a cast exception.

  • Fixed DataReader to convert all returned values to prevent casting errors (thanks Keith Murray).

  • Added code to Command.ExecuteReader to return null if the initial SQL statement throws an exception (thanks Burkhard Perkens-Golomb).

  • Fixed ExecuteScalar bug introduced with restructure.

  • Restructure to allow for LOCAL DATA INFILE and better sequencing of packets.

  • Fixed several bugs related to restructure.

  • Early work done to support more secure passwords in Mysql 4.1. Old passwords in 4.1 not supported yet.

  • Parameters appearing after system parameters are now handled correctly (Adam M. (adammil)).

  • Strings can now be assigned directly to blob fields (Adam M.).

  • Fixed float parameters (thanks Pent).

  • Improved Parameter constructor and ParameterCollection.Add methods to better match SqlClient (thanks Joshua Mouch).

  • Corrected Connection.CreateCommand to return a MySqlCommand type.

  • Fixed connection string designer dialog box problem (thanks Abraham Guyt).

  • Fixed problem with sending commands not always reading the response packet (thanks Joshua Mouch).

  • Fixed parameter serialization where some blobs types were not being handled (thanks Sean McGinnis).

  • Removed spurious MessageBox.show from DataReader code (thanks Joshua Mouch).

  • Fixed a nasty bug in the split sql code (thanks everyone!).

C.4.33. Changes in MySQL Connector/NET Version 0.71

  • Fixed bug in MySqlStream where too much data could attempt to be read (thanks Peter Belbin)

  • Implemented HasRows (thanks Nash Pherson).

  • Fixed bug where tables with more than 252 columns cause an exception (thanks Joshua Kessler).

  • Fixed bug where SQL statements ending in ; would cause a problem (thanks Shane Krueger).

  • Fixed bug in driver where error messages were getting truncated by 1 character (thanks Shane Krueger).

  • Made MySqlException serializable (thanks Mathias Hasselmann).

C.4.34. Changes in MySQL Connector/NET Version 0.70

  • Updated some of the character code pages to be more accurate.

  • Fixed problem where readers could be opened on connections that had readers open.

  • Moved test to separate assembly MySqlClientTests.

  • Fixed stupid problem in driver with sequence out of order (Thanks Peter Belbin).

  • Added some pipe tests.

  • Increased default max pool size to 50.

  • Compiles with Mono 0-24.

  • Fixed connection and data reader dispose problems.

  • Added String datatype handling to parameter serialization.

  • Fixed sequence problem in driver that occurred after thrown exception (thanks Burkhard Perkens-Golomb).

  • Added support for CommandBehavior.SingleRow to DataReader.

  • Fixed command sql processing so quotes are better handled (thanks Theo Spears).

  • Fixed parsing of double, single, and decimal values to account for non-English separators. You still have to use the right syntax if you using hard coded sql, but if you use parameters the code will convert floating point types to use '.' appropriately internal both into the server and out.

  • Added MySqlStream class to simplify timeouts and driver coding.

  • Fixed DataReader so that it is closed properly when the associated connection is closed. [thanks smishra]

  • Made client more SqlClient compliant so that DataReaders have to be closed before the connection can be used to run another command.

  • Improved DBNull.Value handling in the fields.

  • Added several unit tests.

  • Fixed MySqlException base class.

  • Improved driver coding

  • Fixed bug where NextResult was returning false on the last resultset.

  • Added more tests for MySQL.

  • Improved casting problems by equating unsigned 32bit values to Int64 and unsigned 16bit values to Int32, and so forth.

  • Added new constructor for MySqlParameter for (name, type, size, srccol)

  • Fixed bug in MySqlDataReader where it didn't check for null fieldlist before returning field count.

  • Started adding MySqlClient unit tests (added MySqlClient/Tests folder and some test cases).

  • Fixed some things in Connection String handling.

  • Moved INIT_DB to MySqlPool. I may move it again, this is in preparation of the conference.

  • Fixed bug inside CommandBuilder that prevented inserts from happening properly.

  • Reworked some of the internals so that all three execute methods of Command worked properly.

  • Fixed many small bugs found during benchmarking.

  • The first cut of CoonectionPooling is working. "min pool size" and "max pool size" are respected.

  • Work to enable multiple resultsets to be returned.

  • Character sets are handled much more intelligently now. The driver queries MySQL at startup for the default character set. That character set is then used for conversions if that code page can be loaded. If not, then the default code page for the current OS is used.

  • Added code to save the inferred type in the name,value constructor of Parameter.

  • Also, inferred type if value of null parameter is changed using Value property.

  • Converted all files to use proper Camel case. MySQL is now MySql in all files. PgSQL is now PgSql.

  • Added attribute to PgSql code to prevent designer from trying to show.

  • Added MySQLDbType property to Parameter object and added proper conversion code to convert from DbType to MySQLDbType).

  • Removed unused ObjectToString method from MySQLParameter.cs.

  • Fixed Add(..) method in ParameterCollection so that it doesn't use Add(name, value) instead.

  • Fixed IndexOf and Contains in ParameterCollection to be aware that parameter names are now stored without @.

  • Fixed Command.ConvertSQLToBytes so it only allows characters that can be in MySQL variable names.

  • Fixed DataReader and Field so that blob fields read their data from Field.cs and GetBytes works right.

  • Added simple query builder editor to CommandText property of MySQLCommand.

  • Fixed CommandBuilder and Parameter serialization to account for Parameters not storing @ in their names.

  • Removed MySQLFieldType enum from Field.cs. Now using MySQLDbType enum.

  • Added Designer attribute to several classes to prevent designer view when using VS.Net.

  • Fixed Initial catalog typo in ConnectionString designer.

  • Removed 3 parameter constructor for MySQLParameter that conflicted with (name, type, value).

  • Changed MySQLParameter so paramName is now stored without leading @ (this fixed null inserts when using designer).

  • Changed TypeConverter for MySQLParameter to use the constructor with all properties.

C.4.35. Changes in MySQL Connector/NET Version 0.68

  • Fixed sequence issue in driver.

  • Added DbParametersEditor to make parameter editing more like SqlClient.

  • Fixed Command class so that parameters can be edited using the designer

  • Update connection string designer to support Use Compression flag.

  • Fixed string encoding so that European characters like ä will work correctly.

  • Creating base classes to aid in building new data providers.

  • Added support for UID key in connection string.

  • Field, parameter, command now using DBNull.Value instead of null.

  • CommandBuilder using DBNull.Value.

  • CommandBuilder now builds insert command correctly when an auto_insert field is not present.

  • Field now uses typeof keyword to return System.Types (performance).

C.4.36. Changes in MySQL Connector/NET Version 0.65

  • MySQLCommandBuilder now implemented.

  • Transaction support now implemented (not all table types support this).

  • GetSchemaTable fixed to not use xsd (for Mono).

  • Driver is now Mono-compatible.

  • TIME data type now supported.

  • More work to improve Timestamp data type handling.

  • Changed signatures of all classes to match corresponding SqlClient classes.

C.4.37. Changes in MySQL Connector/NET Version 0.60

  • Protocol compression using SharpZipLib (www.icsharpcode.net).

  • Named pipes on Windows now working properly.

  • Work done to improve Timestamp data type handling.

  • Implemented IEnumerable on DataReader so DataGrid would work.

C.4.38. Changes in MySQL Connector/NET Version 0.50

  • Speed increased dramatically by removing bugging network sync code.

  • Driver no longer buffers rows of data (more ADO.Net compliant).

  • Conversion bugs related to TIMESTAMP and DATETIME fields fixed.

C.5. MySQL Visual Studio Plugin Change History

Note

As of Connector/NET 5.1.2 (14 June 2007), the Visual Studion Plugin is part of the main Connector/NET package. For the change history for the Visual Studio Plugin, see Section C.4, “MySQL Connector/NET Change History”.

C.5.1. Changes in MySQL Visual Studio Plugin 1.0.3 (Not yet released)

Bugs fixed:

  • Running queries based on a stored procedure would cause the data set designer to terminate. (Bugs #26364)

  • DataSet wizard would show all tables instead of only the tables available within the selected database. (Bugs #26348)

C.5.2. Changes in MySQL Visual Studio Plugin 1.0.2 (Not yet released)

Bugs fixed:

  • The Add Connection dialog of the Server Explorer would freeze when accessing databases with capitalized characters in their name. (Bug#24875)

  • Creating a connection through the Server Explorer when using the Visual Studio Plugin would fail. The installer for the Visual Studio Plugin has been updated to ensure that Connector/NET 5.0.2 must be installed. (Bug#23071)

C.5.3. Changes in MySQL Visual Studio Plugin 1.0.1 (4 October 2006)

This is a bug fix release to resolve an incompatibility issue with Connector/NET 5.0.1.

It is critical that this release only be used with Connector/NET 5.0.1. After installing Connector/NET 5.0.1, you will need to make a small change in your machine.config file. This file should be located at %win%\Microsoft.Net\Framework\v2.0.50727\CONFIG\machine.config (%win% should be the location of your Windows folder). Near the bottom of the file you will see a line like this:

<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient"
description=".Net Framework Data Provider for MySQL"
type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data"/>

It needs to be changed to be like this:

<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient"
description=".Net Framework Data Provider for MySQL"
type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data,
Version=5.0.1.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"/>
 

C.5.4. Changes in MySQL Visual Studio Plugin 1.0.0 (4 October 2006)

Bugs fixed:

  • Ability to work with MySQL objects (tables, views, stored procedures, etc) from within Server Explorer.

  • DDEX (Data Designer Extensibility) compatibility.

C.6. MySQL Connector/J Change History

C.6.1. Changes in MySQL Connector/J 5.1.x

C.6.1.1. Changes in MySQL Connector/J 5.1.6 (Not yet released)

Functionality added or changed:

  • XAConnections and datasources have been updated to the JDBC-4.0 standard.

  • The profiler event handling has been made extensible via the profilerEventHandler connection property.

  • Add the verifyServerCertificate propery. If set to "false" the driver will not verify the server's certificate when useSSL is set to "true"

    When using this feature, the keystore parameters should be specified by the clientCertificateKeyStore* properties, rather than system properties, as the JSSE doesn't it straightforward to have a non-verifying trust store and the "default" key store.

Bugs fixed:

  • During a Daylight Savings Time (DST) switchover, there was no way to store two timestamp/datetime values , as the hours end up being the same when sent as the literal that MySQL requires.

    Note that to get this scenario to work with MySQL (since it doesn't support per-value timezones), you need to configure your server (or session) to be in UTC, and tell the driver not to use the legacy date/time code by setting useLegacyDatetimeCode to "false". This will cause the driver to always convert to/from the server and client timezone consistently.

    This bug fix also fixes Bug#15604, by adding entirely new date/time handling code that can be switched on by useLegacyDatetimeCode being set to "false" as a JDBC configuration property. For Connector/J 5.1.x, the default is "true", in trunk and beyond it will be "false" (i.e. the old date/time handling code will be deprecated) (Bug#32577, Bug#15604)

  • When unpacking rows directly, we don't hand off error message packets to the internal method which decodes them correctly, so no exception is raised, and the driver than hangs trying to read rows that aren't there. This tends to happen when calling stored procedures, as normal SELECTs won't have an error in this spot in the protocol unless an I/O error occurs. (Bug#32246)

  • When using a connection from ConnectionPoolDataSource, some Connection.prepareStatement() methods would return null instead of the prepared statement. (Bug#32101)

  • Using CallableStatement.setNull() on a stored function would throw an ArrayIndexOutOfBounds exception when setting the last parameter to null. (Bug#31823)

  • MysqlValidConnectionChecker doesn't properly handle connections created using ReplicationConnection. (Bug#31790)

  • DatabaseMetadata.getColumns() doesn't return the correct column names if the connection character isn't UTF-8. A bug in MySQL server compounded the issue, but was fixed within the MySQL 5.0 release cycle. The fix includes changes to all the sections of the code that access the server metadata. (Bug#20491)

  • Fixed ResultSetMetadata.getColumnName() for result sets returned from Statement.getGeneratedKeys() - it was returning null instead of "GENERATED_KEY" as in 5.0.x.

C.6.1.2. Changes in MySQL Connector/J 5.1.5 (09 October 2007)

The following features are new, compared to the 5.0 series of Connector/J

  • Support for JDBC-4.0 NCHAR, NVARCHAR and NCLOB types.

  • JDBC-4.0 support for setting per-connection client information (which can be viewed in the comments section of a query via SHOW PROCESSLIST on a MySQL server, or can be extended to support custom persistence of the information via a public interface).

  • Support for JDBC-4.0 XML processing via JAXP interfaces to DOM, SAX and StAX.

  • JDBC-4.0 standardized unwrapping to interfaces that include vendor extensions.

Functionality added or changed:

  • Added autoSlowLog configuration property, overrides slowQueryThreshold* properties, driver determines slow queries by those that are slower than 5 * stddev of the mean query time (outside the 96% percentile).

Bugs fixed:

  • When a connection is in read-only mode, queries that are wrapped in parentheses were incorrectly identified DML statements. (Bug#28256)

C.6.1.3. Changes in MySQL Connector/J 5.1.4 (Not Released)

Only released internally.

C.6.1.4. Changes in MySQL Connector/J 5.1.3 (10 September 2007)

The following features are new, compared to the 5.0 series of Connector/J

  • Support for JDBC-4.0 NCHAR, NVARCHAR and NCLOB types.

  • JDBC-4.0 support for setting per-connection client information (which can be viewed in the comments section of a query via SHOW PROCESSLIST on a MySQL server, or can be extended to support custom persistence of the information via a public interface).

  • Support for JDBC-4.0 XML processing via JAXP interfaces to DOM, SAX and StAX.

  • JDBC-4.0 standardized unwrapping to interfaces that include vendor extensions.

Functionality added or changed:

  • Connector/J now connects using an initial character set of utf-8 solely for the purpose of authentication to allow user names or database names in any character set to be used in the JDBC connection URL. (Bug#29853)

  • Added two configuration parameters:

    • blobsAreStrings — Should the driver always treat BLOBs as Strings. Added specifically to work around dubious metadata returned by the server for GROUP BY clauses. Defaults to false.

    • functionsNeverReturnBlobs — Should the driver always treat data from functions returning BLOBs as Strings. Added specifically to work around dubious metadata returned by the server for GROUP BY clauses. Defaults to false.

  • Setting rewriteBatchedStatements to true now causes CallableStatements with batched arguments to be re-written in the form "CALL (...); CALL (...); ..." to send the batch in as few client-server round trips as possible.

  • The driver now picks appropriate internal row representation (whole row in one buffer, or individual byte[]s for each column value) depending on heuristics, including whether or not the row has BLOB or TEXT types and the overall row-size. The threshold for row size that will cause the driver to use a buffer rather than individual byte[]s is configured by the configuration property largeRowSizeThreshold, which has a default value of 2KB.

  • The data (and how it's stored) for ResultSet rows are now behind an interface which allows us (in some cases) to allocate less memory per row, in that for "streaming" result sets, we re-use the packet used to read rows, since only one row at a time is ever active.

  • Added experimental support for statement "interceptors" via the com.mysql.jdbc.StatementInterceptor interface, examples are in com/mysql/jdbc/interceptors. Implement this interface to be placed "in between" query execution, so that it can be influenced (currently experimental).

  • The driver will automatically adjust the server session variable net_write_timeout when it determines its been asked for a "streaming" result, and resets it to the previous value when the result set has been consumed. (The configuration property is named netTimeoutForStreamingResults, with a unit of seconds, the value '0' means the driver will not try and adjust this value).

  • JDBC-4.0 ease-of-development features including auto-registration with the DriverManager via the service provider mechanism, standardized Connection validity checks and categorized SQLExceptions based on recoverability/retry-ability and class of the underlying error.

  • Statement.setQueryTimeout()s now affect the entire batch for batched statements, rather than the individual statements that make up the batch.

  • Errors encountered during Statement/PreparedStatement/CallableStatement.executeBatch() when rewriteBatchStatements has been set to true now return BatchUpdateExceptions according to the setting of continueBatchOnError.

    If continueBatchOnError is set to true, the update counts for the "chunk" that were sent as one unit will all be set to EXECUTE_FAILED, but the driver will attempt to process the remainder of the batch. You can determine which "chunk" failed by looking at the update counts returned in the BatchUpdateException.

    If continueBatchOnError is set to "false", the update counts returned will contain all updates up-to and including the failed "chunk", with all counts for the failed "chunk" set to EXECUTE_FAILED.

    Since MySQL doesn't return multiple error codes for multiple-statements, or for multi-value INSERT/REPLACE, it is the application's responsibility to handle determining which item(s) in the "chunk" actually failed.

  • New methods on com.mysql.jdbc.Statement: setLocalInfileInputStream() and getLocalInfileInputStream():

    • setLocalInfileInputStream() sets an InputStream instance that will be used to send data to the MySQL server for a LOAD DATA LOCAL INFILE statement rather than a FileInputStream or URLInputStream that represents the path given as an argument to the statement.

      This stream will be read to completion upon execution of a LOAD DATA LOCAL INFILE statement, and will automatically be closed by the driver, so it needs to be reset before each call to execute*() that would cause the MySQL server to request data to fulfill the request for LOAD DATA LOCAL INFILE.

      If this value is set to NULL, the driver will revert to using a FileInputStream or URLInputStream as required.

    • getLocalInfileInputStream() returns the InputStream instance that will be used to send data in response to a LOAD DATA LOCAL INFILE statement.

      This method returns NULL if no such stream has been set via setLocalInfileInputStream().

  • Setting useBlobToStoreUTF8OutsideBMP to true tells the driver to treat [MEDIUM/LONG]BLOB columns as [LONG]VARCHAR columns holding text encoded in UTF-8 that has characters outside the BMP (4-byte encodings), which MySQL server can't handle natively.

    Set utf8OutsideBmpExcludedColumnNamePattern to a regex so that column names matching the given regex will still be treated as BLOBs The regex must follow the patterns used for the java.util.regex package. The default is to exclude no columns, and include all columns.

    Set utf8OutsideBmpIncludedColumnNamePattern to specify exclusion rules to utf8OutsideBmpExcludedColumnNamePattern". The regex must follow the patterns used for the java.util.regex package.

Bugs fixed:

  • setObject(int, Object, int, int) delegate in PreparedStatmentWrapper delegates to wrong method. (Bug#30892)

  • NPE with null column values when padCharsWithSpace is set to true. (Bug#30851)

  • Collation on VARBINARY column types would be misidentified. A fix has been added, but this fix only works for MySQL server versions 5.0.25 and newer, since earlier versions didn't consistently return correct metadata for functions, and thus results from subqueries and functions were indistinguishable from each other, leading to type-related bugs. (Bug#30664)

  • An ArithmeticException or NullPointerException would be raised when the batch had zero members and rewriteBatchedStatements=true when addBatch() was never called, or executeBatch() was called immediately after clearBatch(). (Bug#30550)

  • Closing a load-balanced connection would cause a ClassCastException. (Bug#29852)

  • Connection checker for JBoss didn't use same method parameters via reflection, causing connections to always seem "bad". (Bug#29106)

  • DatabaseMetaData.getTypeInfo() for the types DECIMAL and NUMERIC will return a precision of 254 for server versions older than 5.0.3, 64 for versions 5.0.3-5.0.5 and 65 for versions newer than 5.0.5. (Bug#28972)

  • CallableStatement.executeBatch() doesn't work when connection property noAccessToProcedureBodies has been set to true.

    The fix involves changing the behavior of noAccessToProcedureBodies,in that the driver will now report all paramters as "IN" paramters but allow callers to call registerOutParameter() on them without throwing an exception. (Bug#28689)

  • DatabaseMetaData.getColumns() doesn't contain SCOPE_* or IS_AUTOINCREMENT columns. (Bug#27915)

  • Schema objects with identifiers other than the connection character aren't retrieved correctly in ResultSetMetadata. (Bug#27867)

  • Connection.getServerCharacterEncoding() doesn't work for servers with version >= 4.1. (Bug#27182)

  • The automated SVN revisions in DBMD.getDriverVersion(). The SVN revision of the directory is now inserted into the version information during the build. (Bug#21116)

  • Specifying a "validation query" in your connection pool that starts with "/* ping */" _exactly_ will cause the driver to instead send a ping to the server and return a fake result set (much lighter weight), and when using a ReplicationConnection or a LoadBalancedConnection, will send the ping across all active connections.

C.6.1.5. Changes in MySQL Connector/J 5.1.2 (29 June 2007)

This is a new Beta development release, fixing recently discovered bugs.

Functionality added or changed:

  • Setting the configuration property rewriteBatchedStatements to true will now cause the driver to rewrite batched prepared statements with more than 3 parameter sets in a batch into multi-statements (separated by ";") if they are not plain (i.e. without SELECT or ON DUPLICATE KEY UPDATE clauses) INSERT or REPLACE statements.

C.6.1.6. Changes in MySQL Connector/J 5.1.1 (22 June 2007)

This is a new Alpha development release, adding new features and fixing recently discovered bugs.

Functionality added or changed:

  • Incompatible Change: Pulled vendor-extension methods of Connection implementation out into an interface to support java.sql.Wrapper functionality from ConnectionPoolDataSource. The vendor extensions are javadoc'd in the com.mysql.jdbc.Connection interface.

    For those looking further into the driver implementation, it is not an API that is used for plugability of implementations inside our driver (which is why there are still references to ConnectionImpl throughout the code).

    We've also added server and client prepareStatement() methods that cover all of the variants in the JDBC API.

    Connection.serverPrepare(String) has been re-named to Connection.serverPrepareStatement() for consistency with Connection.clientPrepareStatement().

  • Row navigation now causes any streams/readers open on the result set to be closed, as in some cases we're reading directly from a shared network packet and it will be overwritten by the "next" row.

  • Made it possible to retrieve prepared statement parameter bindings (to be used in StatementInterceptors, primarily).

  • Externalized the descriptions of connection properties.

  • The data (and how it's stored) for ResultSet rows are now behind an interface which allows us (in some cases) to allocate less memory per row, in that for "streaming" result sets, we re-use the packet used to read rows, since only one row at a time is ever active.

  • Similar to Connection, we pulled out vendor extensions to Statement into an interface named com.mysql.Statement, and moved the Statement class into com.mysql.StatementImpl. The two methods (javadoc'd in com.mysql.Statement are enableStreamingResults(), which already existed, and disableStreamingResults() which sets the statement instance back to the fetch size and result set type it had before enableStreamingResults() was called.

  • Driver now picks appropriate internal row representation (whole row in one buffer, or individual byte[]s for each column value) depending on heuristics, including whether or not the row has BLOB or TEXT types and the overall row-size. The threshold for row size that will cause the driver to use a buffer rather than individual byte[]s is configured by the configuration property largeRowSizeThreshold, which has a default value of 2KB.

  • Added experimental support for statement "interceptors" via the com.mysql.jdbc.StatementInterceptor interface, examples are in com/mysql/jdbc/interceptors.

    Implement this interface to be placed "in between" query execution, so that you can influence it. (currently experimental).

    StatementInterceptors are "chainable" when configured by the user, the results returned by the "current" interceptor will be passed on to the next on in the chain, from left-to-right order, as specified by the user in the JDBC configuration property statementInterceptors.

  • See the sources (fully javadoc'd) for com.mysql.jdbc.StatementInterceptor for more details until we iron out the API and get it documented in the manual.

  • Setting rewriteBatchedStatements to true now causes CallableStatements with batched arguments to be re-written in the form CALL (...); CALL (...); ... to send the batch in as few client-server round trips as possible.

C.6.1.7. Changes in MySQL Connector/J 5.1.0 (11 April 2007)

This is the first public alpha release of the current Connector/J 5.1 development branch, providing an insight to upcoming features. Although some of these are still under development, this release includes the following new features and changes (in comparison to the current Connector/J 5.0 production release):

Important change: Due to a number of issues with the use of server-side prepared statements, Connector/J 5.0.5 has disabled their use by default. The disabling of server-side prepared statements does not affect the operation of the connector in any way.

To enable server-side prepared statements you must add the following configuration property to your connector string:

useServerPrepStmts=true

The default value of this property is false (that is, Connector/J does not use server-side prepared statements).

Note

The disabling of server-side prepared statements does not affect the operation of the connector. However, if you use the useTimezone=true connection option and use client-side prepared statements (instead of server-side prepared statements) you should also set useSSPSCompatibleTimezoneShift=true.

Functionality added or changed:

  • Refactored CommunicationsException into a JDBC-3.0 version, and a JDBC-4.0 version (which extends SQLRecoverableException, now that it exists).

    Note

    This change means that if you were catching com.mysql.jdbc.CommunicationsException in your applications instead of looking at the SQLState class of 08, and are moving to Java 6 (or newer), you need to change your imports to that exception to be com.mysql.jdbc.exceptions.jdbc4.CommunicationsException, as the old class will not be instantiated for communications link-related errors under Java 6.

  • Added support for JDBC-4.0 categorized SQLExceptions.

  • Added support for JDBC-4.0's NCLOB, and NCHAR/NVARCHAR types.

  • com.mysql.jdbc.java6.javac — full path to your Java-6 javac executable

  • Added support for JDBC-4.0's SQLXML interfaces.

  • Re-worked Ant buildfile to build JDBC-4.0 classes separately, as well as support building under Eclipse (since Eclipse can't mix/match JDKs).

    To build, you must set JAVA_HOME to J2SDK-1.4.2 or Java-5, and set the following properties on your Ant command line:

    • com.mysql.jdbc.java6.javac — full path to your Java-6 javac executable

    • com.mysql.jdbc.java6.rtjar — full path to your Java-6 rt.jar file

  • New feature — driver will automatically adjust session variable net_write_timeout when it determines it has been asked for a "streaming" result, and resets it to the previous value when the result set has been consumed. (configuration property is named netTimeoutForStreamingResults value and has a unit of seconds, the value 0 means the driver will not try and adjust this value).

  • Added support for JDBC-4.0's client information. The backend storage of information provided via Connection.setClientInfo() and retrieved by Connection.getClientInfo() is pluggable by any class that implements the com.mysql.jdbc.JDBC4ClientInfoProvider interface and has a no-args constructor.

    The implementation used by the driver is configured using the clientInfoProvider configuration property (with a default of value of com.mysql.jdbc.JDBC4CommentClientInfoProvider, an implementation which lists the client information as a comment prepended to every query sent to the server).

    This functionality is only available when using Java-6 or newer.

  • com.mysql.jdbc.java6.rtjar — full path to your Java-6 rt.jar file

  • Added support for JDBC-4.0's Wrapper interface.

C.6.2. Changes in MySQL Connector/J 5.0.x

C.6.2.1. Changes in MySQL Connector/J 5.0.8 (09 October 2007)

Functionality added or changed:

  • blobsAreStrings — Should the driver always treat BLOBs as Strings. Added specifically to work around dubious metadata returned by the server for GROUP BY clauses. Defaults to false.

  • Added two configuration parameters:

    • blobsAreStrings — Should the driver always treat BLOBs as Strings. Added specifically to work around dubious metadata returned by the server for GROUP BY clauses. Defaults to false.

    • functionsNeverReturnBlobs — Should the driver always treat data from functions returning BLOBs as Strings. Added specifically to work around dubious metadata returned by the server for GROUP BY clauses. Defaults to false.

  • functionsNeverReturnBlobs — Should the driver always treat data from functions returning BLOBs as Strings. Added specifically to work around dubious metadata returned by the server for GROUP BY clauses. Defaults to false.

  • XAConnections now start in auto-commit mode (as per JDBC-4.0 specification clarification).

  • Driver will now fall back to sane defaults for max_allowed_packet and net_buffer_length if the server reports them incorrectly (and will log this situation at WARN level, since it's actually an error condition).

Bugs fixed:

  • Connections established using URLs of the form jdbc:mysql:loadbalance:// weren't doing failover if they tried to connect to a MySQL server that was down. The driver now attempts connections to the next "best" (depending on the load balance strategy in use) server, and continues to attempt connecting to the next "best" server every 250 milliseconds until one is found that is up and running or 5 minutes has passed.

    If the driver gives up, it will throw the last-received SQLException. (Bug#31053)

  • setObject(int, Object, int, int) delegate in PreparedStatmentWrapper delegates to wrong method. (Bug#30892)

  • NPE with null column values when padCharsWithSpace is set to true. (Bug#30851)

  • Collation on VARBINARY column types would be misidentified. A fix has been added, but this fix only works for MySQL server versions 5.0.25 and newer, since earlier versions didn't consistently return correct metadata for functions, and thus results from subqueries and functions were indistinguishable from each other, leading to type-related bugs. (Bug#30664)

  • An ArithmeticException or NullPointerException would be raised when the batch had zero members and rewriteBatchedStatements=true when addBatch() was never called, or executeBatch() was called immediately after clearBatch(). (Bug#30550)

  • Closing a load-balanced connection would cause a ClassCastException. (Bug#29852)

  • Connection checker for JBoss didn't use same method parameters via reflection, causing connections to always seem "bad". (Bug#29106)

  • DatabaseMetaData.getTypeInfo() for the types DECIMAL and NUMERIC will return a precision of 254 for server versions older than 5.0.3, 64 for versions 5.0.3-5.0.5 and 65 for versions newer than 5.0.5. (Bug#28972)

  • CallableStatement.executeBatch() doesn't work when connection property noAccessToProcedureBodies has been set to true.

    The fix involves changing the behavior of noAccessToProcedureBodies,in that the driver will now report all paramters as "IN" paramters but allow callers to call registerOutParameter() on them without throwing an exception. (Bug#28689)

  • When a connection is in read-only mode, queries that are wrapped in parentheses were incorrectly identified DML statements. (Bug#28256)

  • UNSIGNED types not reported via DBMD.getTypeInfo(), and capitalization of type names is not consistent between DBMD.getColumns(), RSMD.getColumnTypeName() and DBMD.getTypeInfo().

    This fix also ensures that the precision of UNSIGNED MEDIUMINT and UNSIGNED BIGINT is reported correctly via DBMD.getColumns(). (Bug#27916)

  • DatabaseMetaData.getColumns() doesn't contain SCOPE_* or IS_AUTOINCREMENT columns. (Bug#27915)

  • Schema objects with identifiers other than the connection character aren't retrieved correctly in ResultSetMetadata. (Bug#27867)

  • Cached metadata with PreparedStatement.execute() throws NullPointerException. (Bug#27412)

  • Connection.getServerCharacterEncoding() doesn't work for servers with version >= 4.1. (Bug#27182)

  • The automated SVN revisions in DBMD.getDriverVersion(). The SVN revision of the directory is now inserted into the version information during the build. (Bug#21116)

  • Specifying a "validation query" in your connection pool that starts with "/* ping */" _exactly_ will cause the driver to instead send a ping to the server and return a fake result set (much lighter weight), and when using a ReplicationConnection or a LoadBalancedConnection, will send the ping across all active connections.

C.6.2.2. Changes in MySQL Connector/J 5.0.7 (20 July 2007)

Functionality added or changed:

  • The driver will now automatically set useServerPrepStmts to true when useCursorFetch has been set to true, since the feature requires server-side prepared statements in order to function.

  • tcpKeepAlive - Should the driver set SO_KEEPALIVE (default true)?

  • Give more information in EOFExceptions thrown out of MysqlIO (how many bytes the driver expected to read, how many it actually read, say that communications with the server were unexpectedly lost).

  • Driver detects when it is running in a ColdFusion MX server (tested with version 7), and uses the configuration bundle coldFusion, which sets useDynamicCharsetInfo to false (see previous entry), and sets useLocalSessionState and autoReconnect to true.

  • tcpNoDelay - Should the driver set SO_TCP_NODELAY (disabling the Nagle Algorithm, default true)?

  • Added configuration property slowQueryThresholdNanos - if useNanosForElapsedTime is set to true, and this property is set to a non-zero value the driver will use this threshold (in nanosecond units) to determine if a query was slow, instead of using millisecond units.

  • tcpRcvBuf - Should the driver set SO_RCV_BUF to the given value? The default value of '0', means use the platform default value for this property.

  • Setting useDynamicCharsetInfo to false now causes driver to use static lookups for collations as well (makes ResultSetMetadata.isCaseSensitive() much more efficient, which leads to performance increase for ColdFusion, which calls this method for every column on every table it sees, it appears).

  • Added configuration properties to allow tuning of TCP/IP socket parameters:

    • tcpNoDelay - Should the driver set SO_TCP_NODELAY (disabling the Nagle Algorithm, default true)?

    • tcpKeepAlive - Should the driver set SO_KEEPALIVE (default true)?

    • tcpRcvBuf - Should the driver set SO_RCV_BUF to the given value? The default value of '0', means use the platform default value for this property.

    • tcpSndBuf - Should the driver set SO_SND_BUF to the given value? The default value of '0', means use the platform default value for this property.

    • tcpTrafficClass - Should the driver set traffic class or type-of-service fields? See the documentation for java.net.Socket.setTrafficClass() for more information.

  • Setting the configuration parameter useCursorFetch to true for MySQL-5.0+ enables the use of cursors that allow Connector/J to save memory by fetching result set rows in chunks (where the chunk size is set by calling setFetchSize() on a Statement or ResultSet) by using fully-materialized cursors on the server.

  • tcpSndBuf - Should the driver set SO_SND_BUF to the given value? The default value of '0', means use the platform default value for this property.

  • tcpTrafficClass - Should the driver set traffic class or type-of-service fields? See the documentation for java.net.Socket.setTrafficClass() for more information.

  • Added new debugging functionality - Setting configuration property includeInnodbStatusInDeadlockExceptions to true will cause the driver to append the output of SHOW ENGINE INNODB STATUS to deadlock-related exceptions, which will enumerate the current locks held inside InnoDB.

  • Added configuration property useNanosForElapsedTime - for profiling/debugging functionality that measures elapsed time, should the driver try to use nanoseconds resolution if available (requires JDK >= 1.5)?

    Note

    If useNanosForElapsedTime is set to true, and this property is set to "0" (or left default), then elapsed times will still be measured in nanoseconds (if possible), but the slow query threshold will be converted from milliseconds to nanoseconds, and thus have an upper bound of approximately 2000 milliseconds (as that threshold is represented as an integer, not a long).

Bugs fixed:

  • Don't send any file data in response to LOAD DATA LOCAL INFILE if the feature is disabled at the client side. This is to prevent a malicious server or man-in-the-middle from asking the client for data that the client is not expecting. Thanks to Jan Kneschke for discovering the exploit and Andrey "Poohie" Hristov, Konstantin Osipov and Sergei Golubchik for discussions about implications and possible fixes. (Bug#29605)

  • Parser in client-side prepared statements runs to end of statement, rather than end-of-line for '#' comments. Also added support for '--' single-line comments. (Bug#28956)

  • Parser in client-side prepared statements eats character following '/' if it's not a multi-line comment. (Bug#28851)

  • PreparedStatement.getMetaData() for statements containing leading one-line comments is not returned correctly.

    As part of this fix, we also overhauled detection of DML for executeQuery() and SELECTs for executeUpdate() in plain and prepared statements to be aware of the same types of comments. (Bug#28469)

C.6.2.3. Changes in MySQL Connector/J 5.0.6 (15 May 2007)

Functionality added or changed:

  • Added an experimental load-balanced connection designed for use with SQL nodes in a MySQL Cluster/NDB environment (This is not for master-slave replication. For that, we suggest you look at ReplicationConnection or lbpool).

    If the JDBC URL starts with jdbc:mysql:loadbalance://host-1,host-2,...host-n, the driver will create an implementation of java.sql.Connection that load balances requests across a series of MySQL JDBC connections to the given hosts, where the balancing takes place after transaction commit.

    Therefore, for this to work (at all), you must use transactions, even if only reading data.

    Physical connections to the given hosts will not be created until needed.

    The driver will invalidate connections that it detects have had communication errors when processing a request. A new connection to the problematic host will be attempted the next time it is selected by the load balancing algorithm.

    There are two choices for load balancing algorithms, which may be specified by the loadBalanceStrategy JDBC URL configuration property:

    • random — the driver will pick a random host for each request. This tends to work better than round-robin, as the randomness will somewhat account for spreading loads where requests vary in response time, while round-robin can sometimes lead to overloaded nodes if there are variations in response times across the workload.

    • bestResponseTime — the driver will route the request to the host that had the best response time for the previous transaction.

  • bestResponseTime — the driver will route the request to the host that had the best response time for the previous transaction.

  • Added configuration property padCharsWithSpace (defaults to false). If set to true, and a result set column has the CHAR type and the value does not fill the amount of characters specified in the DDL for the column, the driver will pad the remaining characters with space (for ANSI compliance).

  • When useLocalSessionState is set to true and connected to a MySQL-5.0 or later server, the JDBC driver will now determine whether an actual commit or rollback statement needs to be sent to the database when Connection.commit() or Connection.rollback() is called.

    This is especially helpful for high-load situations with connection pools that always call Connection.rollback() on connection check-in/check-out because it avoids a round-trip to the server.

  • Added configuration property useDynamicCharsetInfo. If set to false (the default), the driver will use a per-connection cache of character set information queried from the server when necessary, or when set to true, use a built-in static mapping that is more efficient, but isn't aware of custom character sets or character sets implemented after the release of the JDBC driver.

    Note

    This only affects the padCharsWithSpace configuration property and the ResultSetMetaData.getColumnDisplayWidth() method.

  • New configuration property, enableQueryTimeouts (default true).

    When enabled, query timeouts set via Statement.setQueryTimeout() use a shared java.util.Timer instance for scheduling. Even if the timeout doesn't expire before the query is processed, there will be memory used by the TimerTask for the given timeout which won't be reclaimed until the time the timeout would have expired if it hadn't been cancelled by the driver. High-load environments might want to consider disabling this functionality. (this configuration property is part of the maxPerformance configuration bundle).

  • Give better error message when "streaming" result sets, and the connection gets clobbered because of exceeding net_write_timeout on the server.

  • random — the driver will pick a random host for each request. This tends to work better than round-robin, as the randomness will somewhat account for spreading loads where requests vary in response time, while round-robin can sometimes lead to overloaded nodes if there are variations in response times across the workload.

  • com.mysql.jdbc.[NonRegistering]Driver now understands URLs of the format jdbc:mysql:replication:// and jdbc:mysql:loadbalance:// which will create a ReplicationConnection (exactly like when using [NonRegistering]ReplicationDriver) and an experimental load-balanced connection designed for use with SQL nodes in a MySQL Cluster/NDB environment, respectively.

    In an effort to simplify things, we're working on deprecating multiple drivers, and instead specifying different core behavior based upon JDBC URL prefixes, so watch for [NonRegistering]ReplicationDriver to eventually disappear, to be replaced with com.mysql.jdbc[NonRegistering]Driver with the new URL prefix.

  • Fixed issue where a failed-over connection would let an application call setReadOnly(false), when that call should be ignored until the connection is reconnected to a writable master unless failoverReadOnly had been set to false.

  • Driver will now use INSERT INTO ... VALUES (DEFAULT) form of statement for updatable result sets for ResultSet.insertRow(), rather than pre-populating the insert row with values from DatabaseMetaData.getColumns() (which results in a SHOW FULL COLUMNS on the server for every result set). If an application requires access to the default values before insertRow() has been called, the JDBC URL should be configured with populateInsertRowWithDefaultValues set to true.

    This fix specifically targets performance issues with ColdFusion and the fact that it seems to ask for updatable result sets no matter what the application does with them.

  • More intelligent initial packet sizes for the "shared" packets are used (512 bytes, rather than 16K), and initial packets used during handshake are now sized appropriately as to not require reallocation.

Bugs fixed:

  • More useful error messages are generated when the driver thinks a result set is not updatable. (Thanks to Ashley Martens for the patch). (Bug#28085)

  • Connection.getTransactionIsolation() uses "SHOW VARIABLES LIKE" which is very inefficient on MySQL-5.0+ servers. (Bug#27655)

  • Fixed issue where calling getGeneratedKeys() on a prepared statement after calling execute() didn't always return the generated keys (executeUpdate() worked fine however). (Bug#27655)

  • CALL /* ... */ some_proc() doesn't work. As a side effect of this fix, you can now use /* */ and # comments when preparing statements using client-side prepared statement emulation.

    If the comments happen to contain parameter markers (?), they will be treated as belonging to the comment (that is, not recognized) rather than being a parameter of the statement.

    Note

    The statement when sent to the server will contain the comments as-is, they're not stripped during the process of preparing the PreparedStatement or CallableStatement.

    (Bug#27400)

  • ResultSet.get*() with a column index < 1 returns misleading error message. (Bug#27317)

  • Using ResultSet.get*() with a column index less than 1 returns a misleading error message. (Bug#27317)

  • Comments in DDL of stored procedures/functions confuse procedure parser, and thus metadata about them can not be created, leading to inability to retrieve said metadata, or execute procedures that have certain comments in them. (Bug#26959)

  • Fast date/time parsing doesn't take into account 00:00:00 as a legal value. (Bug#26789)

  • PreparedStatement is not closed in BlobFromLocator.getBytes(). (Bug#26592)

  • When the configuration property useCursorFetch was set to true, sometimes server would return new, more exact metadata during the execution of the server-side prepared statement that enables this functionality, which the driver ignored (using the original metadata returned during prepare()), causing corrupt reading of data due to type mismatch when the actual rows were returned. (Bug#26173)

  • CallableStatements with OUT/INOUT parameters that are "binary" (BLOB, BIT, (VAR)BINARY, JAVA_OBJECT) have extra 7 bytes. (Bug#25715)

  • Whitespace surrounding storage/size specifiers in stored procedure parameters declaration causes NumberFormatException to be thrown when calling stored procedure on JDK-1.5 or newer, as the Number classes in JDK-1.5+ are whitespace intolerant. (Bug#25624)

  • Client options not sent correctly when using SSL, leading to stored procedures not being able to return results. Thanks to Don Cohen for the bug report, testcase and patch. (Bug#25545)

  • Statement.setMaxRows() is not effective on result sets materialized from cursors. (Bug#25517)

  • BIT(> 1) is returned as java.lang.String from ResultSet.getObject() rather than byte[]. (Bug#25328)

C.6.2.4. Changes in MySQL Connector/J 5.0.5 (02 March 2007)

Functionality added or changed:

  • Usage Advisor will now issue warnings for result sets with large numbers of rows. You can configure the trigger value by using the resultSetSizeThreshold parameter, which has a default value of 100.

  • The rewriteBatchedStatements feature can now be used with server-side prepared statements.

  • Important change: Due to a number of issues with the use of server-side prepared statements, Connector/J 5.0.5 has disabled their use by default. The disabling of server-side prepared statements does not affect the operation of the connector in any way.

    To enable server-side prepared statements you must add the following configuration property to your connector string:

    useServerPrepStmts=true

    The default value of this property is false (that is, Connector/J does not use server-side prepared statements).

  • Improved speed of datetime parsing for ResultSets that come from plain or non-server-side prepared statements. You can enable old implementation with useFastDateParsing=false as a configuration parameter.

  • Usage Advisor now detects empty results sets and does not report on columns not referenced in those empty sets.

  • Fixed logging of XA commands sent to server, it's now configurable via logXaCommands property (defaults to false).

  • Added configuration property localSocketAddress,which is the hostname or IP address given to explicitly configure the interface that the driver will bind the client side of the TCP/IP connection to when connecting.

  • We've added a new configuration option treatUtilDateAsTimestamp, which is false by default, as (1) We already had specific behavior to treat java.util.Date as a java.sql.Timestamp because it's useful to many folks, and (2) that behavior will very likely be required for drivers JDBC-post-4.0.

Bugs fixed:

  • Connection property socketFactory wasn't exposed via correctly named mutator/accessor, causing data source implementations that use JavaBean naming conventions to set properties to fail to set the property (and in the case of SJAS, fail silently when trying to set this parameter). (Bug#26326)

  • A query execution which timed out did not always throw a MySQLTimeoutException. (Bug#25836)

  • Storing a java.util.Date object in a BLOB column would not be serialized correctly during setObject. (Bug#25787)

  • Timer instance used for Statement.setQueryTimeout() created per-connection, rather than per-VM, causing memory leak. (Bug#25514)

  • EscapeProcessor gets confused by multiple backslashes. We now push the responsibility of syntax errors back on to the server for most escape sequences. (Bug#25399)

  • INOUT parameters in CallableStatements get doubly-escaped. (Bug#25379)

  • When using the rewriteBatchedStatements connection option with PreparedState.executeBatch() an internal memory leak would occur. (Bug#25073)

  • Fixed issue where field-level for metadata from DatabaseMetaData when using INFORMATION_SCHEMA didn't have references to current connections, sometimes leading to Null Pointer Exceptions (NPEs) when introspecting them via ResultSetMetaData. (Bug#25073)

  • StringUtils.indexOfIgnoreCaseRespectQuotes() isn't case-insensitive on the first character of the target. This bug also affected rewriteBatchedStatements functionality when prepared statements did not use uppercase for the VALUES clause. (Bug#25047)

  • Client-side prepared statement parser gets confused by in-line comments /*...*/ and therefore cannot rewrite batch statements or reliably detect the type of statements when they are used. (Bug#25025)

  • Results sets from UPDATE statements that are part of multi-statement queries would cause an SQLException error, "Result is from UPDATE". (Bug#25009)

  • Specifying US-ASCII as the character set in a connection to a MySQL 4.1 or newer server does not map correctly. (Bug#24840)

  • Using DatabaseMetaData.getSQLKeywords() does not return a all of the of the reserved keywords for the current MySQL version. Current implementation returns the list of reserved words for MySQL 5.1, and does not distinguish between versions. (Bug#24794)

  • Calling Statement.cancel() could result in a Null Pointer Exception (NPE). (Bug#24721)

  • Using setFetchSize() breaks prepared SHOW and other commands. (Bug#24360)

  • Calendars and timezones are now lazily instantiated when required. (Bug#24351)

  • Using DATETIME columns would result in time shifts when useServerPrepStmts was true. The reason was due to different behavior when using client-side compared to server-side prepared statements and the useJDBCCompliantTimezoneShift option. This is now fixed if moving from server-side prepared statements to client-side prepared statements by setting useSSPSCompatibleTimezoneShift to true, as the driver can't tell if this is a new deployment that never used server-side prepared statements, or if it is an existing deployment that is switching to client-side prepared statements from server-side prepared statements. (Bug#24344)

  • Connector/J now returns a better error message when server doesn't return enough information to determine stored procedure/function parameter types. (Bug#24065)

  • A connection error would occur when connecting to a MySQL server with certain character sets. Some collations/character sets reported as "unknown" (specifically cias variants of existing character sets), and inability to override the detected server character set. (Bug#23645)

  • Inconsistency between getSchemas and INFORMATION_SCHEMA. (Bug#23304)

  • DatabaseMetaData.getSchemas() doesn't return a TABLE_CATALOG column. (Bug#23303)

  • When using a JDBC connection URL that is malformed, the NonRegisteringDriver.getPropertyInfo method will throw a Null Pointer Exception (NPE). (Bug#22628)

  • Some exceptions thrown out of StandardSocketFactory were needlessly wrapped, obscuring their true cause, especially when using socket timeouts. (Bug#21480)

  • When using a server-side prepared statement the driver would send timestamps to the server using nanoseconds instead of milliseconds. (Bug#21438)

  • When using server-side prepared statements and timestamp columns, value would be incorrectly populated (with nanoseconds, not microseconds). (Bug#21438)

  • ParameterMetaData throws NullPointerException when prepared SQL has a syntax error. Added generateSimpleParameterMetadata configuration property, which when set to true will generate metadata reflecting VARCHAR for every parameter (the default is false, which will cause an exception to be thrown if no parameter metadata for the statement is actually available). (Bug#21267)

  • Fixed an issue where XADataSources couldn't be bound into JNDI, as the DataSourceFactory didn't know how to create instances of them.

Other changes:

  • Avoid static synchronized code in JVM class libraries for dealing with default timezones.

  • Performance enhancement of initial character set configuration, driver will only send commands required to configure connection character set session variables if the current values on the server do not match what is required.

  • Re-worked stored procedure parameter parser to be more robust. Driver no longer requires BEGIN in stored procedure definition, but does have requirement that if a stored function begins with a label directly after the "returns" clause, that the label is not a quoted identifier.

  • Throw exceptions encountered during timeout to thread calling Statement.execute*(), rather than RuntimeException.

  • Changed cached result set metadata (when using cacheResultSetMetadata=true) to be cached per-connection rather than per-statement as previously implemented.

  • Reverted back to internal character conversion routines for single-byte character sets, as the ones internal to the JVM are using much more CPU time than our internal implementation.

  • When extracting foreign key information from SHOW CREATE TABLE in DatabaseMetaData, ignore exceptions relating to tables being missing (which could happen for cross-reference or imported-key requests, as the list of tables is generated first, then iterated).

  • Fixed some Null Pointer Exceptions (NPEs) when cached metadata was used with UpdatableResultSets.

  • Take localSocketAddress property into account when creating instances of CommunicationsException when the underyling exception is a java.net.BindException, so that a friendlier error message is given with a little internal diagnostics.

  • Fixed cases where ServerPreparedStatements weren't using cached metadata when cacheResultSetMetadata=true was used.

  • Use a java.util.TreeMap to map column names to ordinal indexes for ResultSet.findColumn() instead of a HashMap. This allows us to have case-insensitive lookups (required by the JDBC specification) without resorting to the many transient object instances needed to support this requirement with a normal HashMap with either case-adjusted keys, or case-insensitive keys. (In the worst case scenario for lookups of a 1000 column result set, TreeMaps are about half as fast wall-clock time as a HashMap, however in normal applications their use gives many orders of magnitude reduction in transient object instance creation which pays off later for CPU usage in garbage collection).

  • When using cached metadata, skip field-level metadata packets coming from the server, rather than reading them and discarding them without creating com.mysql.jdbc.Field instances.

C.6.2.5. Changes in MySQL Connector/J 5.0.4 (20 October 2006)

Bugs fixed:

  • DBMD.getColumns() does not return expected COLUMN_SIZE for the SET type, now returns length of largest possible set disregarding whitespace or the "," delimitters to be consistent with the ODBC driver. (Bug#22613)

  • Added new _ci collations to CharsetMapping - utf8_unicode_ci not working. (Bug#22456)

  • Driver was using milliseconds for Statement.setQueryTimeout() when specification says argument is to be in seconds. (Bug#22359)

  • Workaround for server crash when calling stored procedures via a server-side prepared statement (driver now detects prepare(stored procedure) and substitutes client-side prepared statement). (Bug#22297)

  • Driver issues truncation on write exception when it shouldn't (due to sending big decimal incorrectly to server with server-side prepared statement). (Bug#22290)

  • Newlines causing whitespace to span confuse procedure parser when getting parameter metadata for stored procedures. (Bug#22024)

  • When using information_schema for metadata, COLUMN_SIZE for getColumns() is not clamped to range of java.lang.Integer as is the case when not using information_schema, thus leading to a truncation exception that isn't present when not using information_schema. (Bug#21544)

  • Column names don't match metadata in cases where server doesn't return original column names (column functions) thus breaking compatibility with applications that expect 1-1 mappings between findColumn() and rsmd.getColumnName(), usually manifests itself as "Can't find column ('')" exceptions. (Bug#21379)

  • Driver now sends numeric 1 or 0 for client-prepared statement setBoolean() calls instead of '1' or '0'.

  • Fixed configuration property jdbcCompliantTruncation was not being used for reads of result set values.

  • DatabaseMetaData correctly reports true for supportsCatalog*() methods.

  • Driver now supports {call sp} (without "()" if procedure has no arguments).

C.6.2.6. Changes in MySQL Connector/J 5.0.3 (26 July 2006)

Functionality added or changed:

  • Added configuration option noAccessToProcedureBodies which will cause the driver to create basic parameter metadata for CallableStatements when the user does not have access to procedure bodies via SHOW CREATE PROCEDURE or selecting from mysql.proc instead of throwing an exception. The default value for this option is false

Bugs fixed:

  • Fixed Statement.cancel() causes NullPointerException if underlying connection has been closed due to server failure. (Bug#20650)

  • If the connection to the server has been closed due to a server failure, then the cleanup process will call Statement.cancel(), triggering a NullPointerException, even though there is no active connection. (Bug#20650)

C.6.2.7. Changes in MySQL Connector/J 5.0.2 (11 July 2006)

Bugs fixed:

  • MysqlXaConnection.recover(int flags) now allows combinations of XAResource.TMSTARTRSCAN and TMENDRSCAN. To simulate the “scanning” nature of the interface, we return all prepared XIDs for TMSTARTRSCAN, and no new XIDs for calls with TMNOFLAGS, or TMENDRSCAN when not in combination with TMSTARTRSCAN. This change was made for API compliance, as well as integration with IBM WebSphere's transaction manager. (Bug#20242)

  • Fixed MysqlValidConnectionChecker for JBoss doesn't work with MySQLXADataSources. (Bug#20242)

  • Added connection/datasource property pinGlobalTxToPhysicalConnection (defaults to false). When set to true, when using XAConnections, the driver ensures that operations on a given XID are always routed to the same physical connection. This allows the XAConnection to support XA START ... JOIN after XA END has been called, and is also a workaround for transaction managers that don't maintain thread affinity for a global transaction (most either always maintain thread affinity, or have it as a configuration option). (Bug#20242)

  • Better caching of character set converters (per-connection) to remove a bottleneck for multibyte character sets. (Bug#20242)

  • Fixed ConnectionProperties (and thus some subclasses) are not serializable, even though some J2EE containers expect them to be. (Bug#19169)

  • Fixed driver fails on non-ASCII platforms. The driver was assuming that the platform character set would be a superset of MySQL's latin1 when doing the handshake for authentication, and when reading error messages. We now use Cp1252 for all strings sent to the server during the handshake phase, and a hard-coded mapping of the language systtem variable to the character set that is used for error messages. (Bug#18086)

  • Fixed can't use XAConnection for local transactions when no global transaction is in progress. (Bug#17401)

C.6.2.8. Changes in MySQL Connector/J 5.0.1 (Not Released)

Not released due to a packaging error

C.6.2.9. Changes in MySQL Connector/J 5.0.0 (22 December 2005)

Bugs fixed:

  • Added support for Connector/MXJ integration via url subprotocol jdbc:mysql:mxj://.... (Bug#14729)

  • Idle timeouts cause XAConnections to whine about rolling themselves back. (Bug#14729)

  • When fix for Bug#14562 was merged from 3.1.12, added functionality for CallableStatement's parameter metadata to return correct information for .getParameterClassName(). (Bug#14729)

  • Added service-provider entry to META-INF/services/java.sql.Driver for JDBC-4.0 support. (Bug#14729)

  • Fuller synchronization of Connection to avoid deadlocks when using multithreaded frameworks that multithread a single connection (usually not recommended, but the JDBC spec allows it anyways), part of fix to Bug#14972). (Bug#14729)

  • Moved all SQLException constructor usage to a factory in SQLError (ground-work for JDBC-4.0 SQLState-based exception classes). (Bug#14729)

  • Removed Java5-specific calls to BigDecimal constructor (when result set value is '', (int)0 was being used as an argument indirectly via method return value. This signature doesn't exist prior to Java5.) (Bug#14729)

  • Implementation of Statement.cancel() and Statement.setQueryTimeout(). Both require MySQL-5.0.0 or newer server, require a separate connection to issue the KILL QUERY statement, and in the case of setQueryTimeout() creates an additional thread to handle the timeout functionality.

    Note: Failures to cancel the statement for setQueryTimeout() may manifest themselves as RuntimeExceptions rather than failing silently, as there is currently no way to unblock the thread that is executing the query being cancelled due to timeout expiration and have it throw the exception instead. (Bug#14729)

  • Return "[VAR]BINARY" for RSMD.getColumnTypeName() when that is actually the type, and it can be distinguished (MySQL-4.1 and newer). (Bug#14729)

  • Attempt detection of the MySQL type BINARY (it's an alias, so this isn't always reliable), and use the java.sql.Types.BINARY type mapping for it.

  • Added unit tests for XADatasource, as well as friendlier exceptions for XA failures compared to the "stock" XAException (which has no messages).

  • If the connection useTimezone is set to true, then also respect time zone conversions in escape-processed string literals (for example, "{ts ...}" and "{t ...}").

  • Don't allow .setAutoCommit(true), or .commit() or .rollback() on an XA-managed connection as per the JDBC specification.

  • XADataSource implemented (ported from 3.2 branch which won't be released as a product). Use com.mysql.jdbc.jdbc2.optional.MysqlXADataSource as your datasource class name in your application server to utilize XA transactions in MySQL-5.0.10 and newer.

  • Moved -bin-g.jar file into separate debug subdirectory to avoid confusion.

  • Return original column name for RSMD.getColumnName() if the column was aliased, alias name for .getColumnLabel() (if aliased), and original table name for .getTableName(). Note this only works for MySQL-4.1 and newer, as older servers don't make this information available to clients.

  • Setting useJDBCCompliantTimezoneShift=true (it's not the default) causes the driver to use GMT for all TIMESTAMP/DATETIME time zones, and the current VM time zone for any other type that refers to time zones. This feature can not be used when useTimezone=true to convert between server and client time zones.

  • PreparedStatement.setString() didn't work correctly when sql_mode on server contained NO_BACKSLASH_ESCAPES and no characters that needed escaping were present in the string.

  • Add one level of indirection of internal representation of CallableStatement parameter metadata to avoid class not found issues on JDK-1.3 for ParameterMetadata interface (which doesn't exist prior to JDBC-3.0).

C.6.3. Changes in MySQL Connector/J 3.1.x

C.6.3.1. Changes in MySQL Connector/J 3.1.15 (Not yet released)

Important change: Due to a number of issues with the use of server-side prepared statements, Connector/J 5.0.5 has disabled their use by default. The disabling of server-side prepared statements does not affect the operation of the connector in any way.

To enable server-side prepared statements you must add the following configuration property to your connector string:

useServerPrepStmts=true

The default value of this property is false (that is, Connector/J does not use server-side prepared statements).

Bugs fixed:

  • Specifying US-ASCII as the character set in a connection to a MySQL 4.1 or newer server does not map correctly. (Bug#24840)

C.6.3.2. Changes in MySQL Connector/J 3.1.14 (10-19-2006)

Bugs fixed:

  • Check and store value for continueBatchOnError property in constructor of Statements, rather than when executing batches, so that Connections closed out from underneath statements don't cause NullPointerExceptions when it's required to check this property. (Bug#22290)

  • Fixed Bug#18258 - DatabaseMetaData.getTables(), columns() with bad catalog parameter threw exception rather than return empty result set (as required by spec). (Bug#22290)

  • Driver now sends numeric 1 or 0 for client-prepared statement setBoolean() calls instead of '1' or '0'. (Bug#22290)

  • Fixed bug where driver would not advance to next host if roundRobinLoadBalance=true and the last host in the list is down. (Bug#22290)

  • Driver issues truncation on write exception when it shouldn't (due to sending big decimal incorrectly to server with server-side prepared statement). (Bug#22290)

  • Fixed bug when calling stored functions, where parameters weren't numbered correctly (first parameter is now the return value, subsequent parameters if specified start at index "2"). (Bug#22290)

  • Removed logger autodetection altogether, must now specify logger explicitly if you want to use a logger other than one that logs to STDERR. (Bug#21207)

  • DDriver throws NPE when tracing prepared statements that have been closed (in asSQL()). (Bug#21207)

  • ResultSet.getSomeInteger() doesn't work for BIT(>1). (Bug#21062)

  • Escape of quotes in client-side prepared statements parsing not respected. Patch covers more than bug report, including NO_BACKSLASH_ESCAPES being set, and stacked quote characters forms of escaping (that is, '' or ""). (Bug#20888)

  • Fixed can't pool server-side prepared statements, exception raised when re-using them. (Bug#20687)

  • Fixed Updatable result set that contains a BIT column fails when server-side prepared statements are used. (Bug#20485)

  • Fixed updatable result set throws ClassCastException when there is row data and moveToInsertRow() is called. (Bug#20479)

  • Fixed ResultSet.getShort() for UNSIGNED TINYINT returns incorrect values when using server-side prepared statements. (Bug#20306)

  • ReplicationDriver does not always round-robin load balance depending on URL used for slaves list. (Bug#19993)

  • Fixed calling toString() on ResultSetMetaData for driver-generated (that is, from DatabaseMetaData method calls, or from getGeneratedKeys()) result sets would raise a NullPointerException. (Bug#19993)

  • Connection fails to localhost when using timeout and IPv6 is configured. (Bug#19726)

  • ResultSet.getFloatFromString() can't retrieve values near Float.MIN/MAX_VALUE. (Bug#18880)

  • Fixed memory leak with profileSQL=true. (Bug#16987)

  • Fixed NullPointerException in MysqlDataSourceFactory due to Reference containing RefAddrs with null content. (Bug#16791)

C.6.3.3. Changes in MySQL Connector/J 3.1.13 (26 May 2006)

Bugs fixed:

  • Fixed PreparedStatement.setObject(int, Object, int) doesn't respect scale of BigDecimals. (Bug#19615)

  • Fixed ResultSet.wasNull() returns incorrect value when extracting native string from server-side prepared statement generated result set. (Bug#19282)

  • Fixed invalid classname returned for ResultSetMetaData.getColumnClassName() for BIGINT type. (Bug#19282)

  • Fixed case where driver wasn't reading server status correctly when fetching server-side prepared statement rows, which in some cases could cause warning counts to be off, or multiple result sets to not be read off the wire. (Bug#19282)

  • Fixed data truncation and getWarnings() only returns last warning in set. (Bug#18740)

  • Fixed aliased column names where length of name > 251 are corrupted. (Bug#18554)

  • Improved performance of retrieving BigDecimal, Time, Timestamp and Date values from server-side prepared statements by creating fewer short-lived instances of Strings when the native type is not an exact match for the requested type. (Bug#18496)

  • Added performance feature, re-writing of batched executes for Statement.executeBatch() (for all DML statements) and PreparedStatement.executeBatch() (for INSERTs with VALUE clauses only). Enable by using "rewriteBatchedStatements=true" in your JDBC URL. (Bug#18041)

  • Fixed issue where server-side prepared statements don't cause truncation exceptions to be thrown when truncation happens. (Bug#18041)

  • Fixed CallableStatement.registerOutParameter() not working when some parameters pre-populated. Still waiting for feedback from JDBC experts group to determine what correct parameter count from getMetaData() should be, however. (Bug#17898)

  • Fixed calling clearParameters() on a closed prepared statement causes NPE. (Bug#17587)

  • Map "latin1" on MySQL server to CP1252 for MySQL > 4.1.0. (Bug#17587)

  • Added additional accessor and mutator methods on ConnectionProperties so that DataSource users can use same naming as regular URL properties. (Bug#17587)

  • Fixed ResultSet.wasNull() not always reset correctly for booleans when done via conversion for server-side prepared statements. (Bug#17450)

  • Fixed Statement.getGeneratedKeys() throws NullPointerException when no query has been processed. (Bug#17099)

  • Fixed updatable result set doesn't return AUTO_INCREMENT values for insertRow() when multiple column primary keys are used. (the driver was checking for the existence of single-column primary keys and an autoincrement value > 0 instead of a straightforward isAutoIncrement() check). (Bug#16841)

  • DBMD.getColumns() returns wrong type for BIT. (Bug#15854)

  • lib-nodist directory missing from package breaks out-of-box build. (Bug#15676)

  • Fixed issue with ReplicationConnection incorrectly copying state, doesn't transfer connection context correctly when transitioning between the same read-only states. (Bug#15570)

  • No "dos" character set in MySQL > 4.1.0. (Bug#15544)

  • INOUT parameter does not store IN value. (Bug#15464)

  • PreparedStatement.setObject() serializes BigInteger as object, rather than sending as numeric value (and is thus not complementary to .getObject() on an UNSIGNED LONG type). (Bug#15383)

  • Fixed issue where driver was unable to initialize character set mapping tables. Removed reliance on .properties files to hold this information, as it turns out to be too problematic to code around class loader hierarchies that change depending on how an application is deployed. Moved information back into the CharsetMapping class. (Bug#14938)

  • Exception thrown for new decimal type when using updatable result sets. (Bug#14609)

  • Driver now aware of fix for BIT type metadata that went into MySQL-5.0.21 for server not reporting length consistently . (Bug#13601)

  • Added support for Apache Commons logging, use "com.mysql.jdbc.log.CommonsLogger" as the value for the "logger" configuration property. (Bug#13469)

  • Fixed driver trying to call methods that don't exist on older and newer versions of Log4j. The fix is not trying to auto-detect presence of log4j, too many different incompatible versions out there in the wild to do this reliably.

    If you relied on autodetection before, you will need to add "logger=com.mysql.jdbc.log.Log4JLogger" to your JDBC URL to enable Log4J usage, or alternatively use the new "CommonsLogger" class to take care of this. (Bug#13469)

  • LogFactory now prepends "com.mysql.jdbc.log" to log class name if it can't be found as-specified. This allows you to use "short names" for the built-in log factories, for example "logger=CommonsLogger" instead of "logger=com.mysql.jdbc.log.CommonsLogger". (Bug#13469)

  • ResultSet.getShort() for UNSIGNED TINYINT returned wrong values. (Bug#11874)

C.6.3.4. Changes in MySQL Connector/J 3.1.12 (30 November 2005)

Bugs fixed:

  • Process escape tokens in Connection.prepareStatement(...). You can disable this behavior by setting the JDBC URL configuration property processEscapeCodesForPrepStmts to false. (Bug#15141)

  • Usage advisor complains about unreferenced columns, even though they've been referenced. (Bug#15065)

  • Driver incorrectly closes streams passed as arguments to PreparedStatements. Reverts to legacy behavior by setting the JDBC configuration property autoClosePStmtStreams to true (also included in the 3-0-Compat configuration “bundle”). (Bug#15024)

  • Deadlock while closing server-side prepared statements from multiple threads sharing one connection. (Bug#14972)

  • Unable to initialize character set mapping tables (due to J2EE classloader differences). (Bug#14938)

  • Escape processor replaces quote character in quoted string with string delimiter. (Bug#14909)

  • DatabaseMetaData.getColumns() doesn't return TABLE_NAME correctly. (Bug#14815)

  • storesMixedCaseIdentifiers() returns false (Bug#14562)

  • storesLowerCaseIdentifiers() returns true (Bug#14562)

  • storesMixedCaseQuotedIdentifiers() returns false (Bug#14562)

  • storesMixedCaseQuotedIdentifiers() returns true (Bug#14562)

  • If lower_case_table_names=0 (on server):

    • storesLowerCaseIdentifiers() returns false

    • storesLowerCaseQuotedIdentifiers() returns false

    • storesMixedCaseIdentifiers() returns true

    • storesMixedCaseQuotedIdentifiers() returns true

    • storesUpperCaseIdentifiers() returns false

    • storesUpperCaseQuotedIdentifiers() returns true

    (Bug#14562)

  • storesUpperCaseIdentifiers() returns false (Bug#14562)

  • storesUpperCaseQuotedIdentifiers() returns true (Bug#14562)

  • If lower_case_table_names=1 (on server):

    • storesLowerCaseIdentifiers() returns true

    • storesLowerCaseQuotedIdentifiers() returns true

    • storesMixedCaseIdentifiers() returns false

    • storesMixedCaseQuotedIdentifiers() returns false

    • storesUpperCaseIdentifiers() returns false

    • storesUpperCaseQuotedIdentifiers() returns true

    (Bug#14562)

  • storesLowerCaseQuotedIdentifiers() returns true (Bug#14562)

  • Fixed DatabaseMetaData.stores*Identifiers():

    • If lower_case_table_names=0 (on server):

      • storesLowerCaseIdentifiers() returns false

      • storesLowerCaseQuotedIdentifiers() returns false

      • storesMixedCaseIdentifiers() returns true

      • storesMixedCaseQuotedIdentifiers() returns true

      • storesUpperCaseIdentifiers() returns false

      • storesUpperCaseQuotedIdentifiers() returns true

    • If lower_case_table_names=1 (on server):

      • storesLowerCaseIdentifiers() returns true

      • storesLowerCaseQuotedIdentifiers() returns true

      • storesMixedCaseIdentifiers() returns false

      • storesMixedCaseQuotedIdentifiers() returns false

      • storesUpperCaseIdentifiers() returns false

      • storesUpperCaseQuotedIdentifiers() returns true

    (Bug#14562)

  • storesMixedCaseIdentifiers() returns true (Bug#14562)

  • storesLowerCaseQuotedIdentifiers() returns false (Bug#14562)

  • Java type conversion may be incorrect for MEDIUMINT. (Bug#14562)

  • storesLowerCaseIdentifiers() returns false (Bug#14562)

  • Added configuration property useGmtMillisForDatetimes which when set to true causes ResultSet.getDate(), .getTimestamp() to return correct millis-since GMT when .getTime() is called on the return value (currently default is false for legacy behavior). (Bug#14562)

  • Extraneous sleep on autoReconnect. (Bug#13775)

  • Reconnect during middle of executeBatch() should not occur if autoReconnect is enabled. (Bug#13255)

  • maxQuerySizeToLog is not respected. Added logging of bound values for execute() phase of server-side prepared statements when profileSQL=true as well. (Bug#13048)

  • OpenOffice expects DBMD.supportsIntegrityEnhancementFacility() to return true if foreign keys are supported by the datasource, even though this method also covers support for check constraints, which MySQL doesn't have. Setting the configuration property overrideSupportsIntegrityEnhancementFacility to true causes the driver to return true for this method. (Bug#12975)

  • Added com.mysql.jdbc.testsuite.url.default system property to set default JDBC url for testsuite (to speed up bug resolution when I'm working in Eclipse). (Bug#12975)

  • logSlowQueries should give better info. (Bug#12230)

  • Don't increase timeout for failover/reconnect. (Bug#6577)

  • Fixed client-side prepared statement bug with embedded ? characters inside quoted identifiers (it was recognized as a placeholder, when it was not).

  • Don't allow executeBatch() for CallableStatements with registered OUT/INOUT parameters (JDBC compliance).

  • Fall back to platform-encoding for URLDecoder.decode() when parsing driver URL properties if the platform doesn't have a two-argument version of this method.

C.6.3.5. Changes in MySQL Connector/J 3.1.11 (07 October 2005)

Bugs fixed:

  • The configuration property sessionVariables now allows you to specify variables that start with the “@” sign. (Bug#13453)

  • URL configuration parameters don't allow “&” or “=” in their values. The JDBC driver now parses configuration parameters as if they are encoded using the application/x-www-form-urlencoded format as specified by java.net.URLDecoder (http://java.sun.com/j2se/1.5.0/docs/api/java/net/URLDecoder.html).

    If the “%” character is present in a configuration property, it must now be represented as %25, which is the encoded form of “%” when using application/x-www-form-urlencoded encoding. (Bug#13453)

  • Workaround for Bug#13374: ResultSet.getStatement() on closed result set returns NULL (as per JDBC 4.0 spec, but not backward-compatible). Set the connection property retainStatementAfterResultSetClose to true to be able to retrieve a ResultSet's statement after the ResultSet has been closed via .getStatement() (the default is false, to be JDBC-compliant and to reduce the chance that code using JDBC leaks Statement instances). (Bug#13277)

  • ResultSetMetaData from Statement.getGeneratedKeys() caused a NullPointerException to be thrown whenever a method that required a connection reference was called. (Bug#13277)

  • Backport of VAR[BINARY|CHAR] [BINARY] types detection from 5.0 branch. (Bug#13277)

  • Fixed NullPointerException when converting catalog parameter in many DatabaseMetaDataMethods to byte[]s (for the result set) when the parameter is null. (null isn't technically allowed by the JDBC specification, but we've historically allowed it). (Bug#13277)

  • Backport of Field class, ResultSetMetaData.getColumnClassName(), and ResultSet.getObject(int) changes from 5.0 branch to fix behavior surrounding VARCHAR BINARY/VARBINARY and related types. (Bug#13277)

  • Read response in MysqlIO.sendFileToServer(), even if the local file can't be opened, otherwise next query issued will fail, because it's reading the response to the empty LOAD DATA INFILE packet sent to the server. (Bug#13277)

  • When gatherPerfMetrics is enabled for servers older than 4.1.0, a NullPointerException is thrown from the constructor of ResultSet if the query doesn't use any tables. (Bug#13043)

  • java.sql.Types.OTHER returned for BINARY and VARBINARY columns when using DatabaseMetaData.getColumns(). (Bug#12970)

  • ServerPreparedStatement.getBinding() now checks if the statement is closed before attempting to reference the list of parameter bindings, to avoid throwing a NullPointerException. (Bug#12970)

  • Tokenizer for = in URL properties was causing sessionVariables=.... to be parameterized incorrectly. (Bug#12753)

  • cp1251 incorrectly mapped to win1251 for servers newer than 4.0.x. (Bug#12752)

  • getExportedKeys() (Bug#12541)

  • Specifying a catalog works as stated in the API docs. (Bug#12541)

  • Specifying NULL means that catalog will not be used to filter the results (thus all databases will be searched), unless you've set nullCatalogMeansCurrent=true in your JDBC URL properties. (Bug#12541)

  • getIndexInfo() (Bug#12541)

  • getProcedures() (and thus indirectly getProcedureColumns()) (Bug#12541)

  • getImportedKeys() (Bug#12541)

  • Specifying "" means “current” catalog, even though this isn't quite JDBC spec compliant, it's there for legacy users. (Bug#12541)

  • getCrossReference() (Bug#12541)

  • Added Connection.isMasterConnection() for clients to be able to determine if a multi-host master/slave connection is connected to the first host in the list. (Bug#12541)

  • getColumns() (Bug#12541)

  • Handling of catalog argument in DatabaseMetaData.getIndexInfo(), which also means changes to the following methods in DatabaseMetaData:

    • getBestRowIdentifier()

    • getColumns()

    • getCrossReference()

    • getExportedKeys()

    • getImportedKeys()

    • getIndexInfo()

    • getPrimaryKeys()

    • getProcedures() (and thus indirectly getProcedureColumns())

    • getTables()

    The catalog argument in all of these methods now behaves in the following way:

    • Specifying NULL means that catalog will not be used to filter the results (thus all databases will be searched), unless you've set nullCatalogMeansCurrent=true in your JDBC URL properties.

    • Specifying "" means “current” catalog, even though this isn't quite JDBC spec compliant, it's there for legacy users.

    • Specifying a catalog works as stated in the API docs.

    • Made Connection.clientPrepare() available from “wrapped” connections in the jdbc2.optional package (connections built by ConnectionPoolDataSource instances).

    (Bug#12541)

  • getBestRowIdentifier() (Bug#12541)

  • Made Connection.clientPrepare() available from “wrapped” connections in the jdbc2.optional package (connections built by ConnectionPoolDataSource instances). (Bug#12541)

  • getTables() (Bug#12541)

  • getPrimaryKeys() (Bug#12541)

  • Connection.prepareCall() is database name case-sensitive (on Windows systems). (Bug#12417)

  • explainSlowQueries hangs with server-side prepared statements. (Bug#12229)

  • Properties shared between master and slave with replication connection. (Bug#12218)

  • Geometry types not handled with server-side prepared statements. (Bug#12104)

  • maxPerformance.properties mis-spells “elideSetAutoCommits”. (Bug#11976)

  • ReplicationConnection won't switch to slave, throws “Catalog can't be null” exception. (Bug#11879)

  • Pstmt.setObject(...., Types.BOOLEAN) throws exception. (Bug#11798)

  • Escape tokenizer doesn't respect stacked single quotes for escapes. (Bug#11797)

  • GEOMETRY type not recognized when using server-side prepared statements. (Bug#11797)

  • Foreign key information that is quoted is parsed incorrectly when DatabaseMetaData methods use that information. (Bug#11781)

  • The sendBlobChunkSize property is now clamped to max_allowed_packet with consideration of stream buffer size and packet headers to avoid PacketTooBigExceptions when max_allowed_packet is similar in size to the default sendBlobChunkSize which is 1M. (Bug#11781)

  • CallableStatement.clearParameters() now clears resources associated with INOUT/OUTPUT parameters as well as INPUT parameters. (Bug#11781)

  • Fixed regression caused by fix for Bug#11552 that caused driver to return incorrect values for unsigned integers when those integers where within the range of the positive signed type. (Bug#11663)

  • Moved source code to Subversion repository. (Bug#11663)

  • Incorrect generation of testcase scripts for server-side prepared statements. (Bug#11663)

  • Fixed statements generated for testcases missing ; for “plain” statements. (Bug#11629)

  • Spurious ! on console when character encoding is utf8. (Bug#11629)

  • StringUtils.getBytes() doesn't work when using multi-byte character encodings and a length in characters is specified. (Bug#11614)

  • DBMD.storesLower/Mixed/UpperIdentifiers() reports incorrect values for servers deployed on Windows. (Bug#11575)

  • Reworked Field class, *Buffer, and MysqlIO to be aware of field lengths > Integer.MAX_VALUE. (Bug#11498)

  • Escape processor didn't honor strings demarcated with double quotes. (Bug#11498)

  • Updated DBMD.supportsCorrelatedQueries() to return true for versions > 4.1, supportsGroupByUnrelated() to return true and getResultSetHoldability() to return HOLD_CURSORS_OVER_COMMIT. (Bug#11498)

  • Lifted restriction of changing streaming parameters with server-side prepared statements. As long as all streaming parameters were set before execution, .clearParameters() does not have to be called. (due to limitation of client/server protocol, prepared statements can not reset individual stream data on the server side). (Bug#11498)

  • ResultSet.moveToCurrentRow() fails to work when preceded by a call to ResultSet.moveToInsertRow(). (Bug#11190)

  • VARBINARY data corrupted when using server-side prepared statements and .setBytes(). (Bug#11115)

  • Statement.getWarnings() fails with NPE if statement has been closed. (Bug#10630)

  • Only get char[] from SQL in PreparedStatement.ParseInfo() when needed. (Bug#10630)

C.6.3.6. Changes in MySQL Connector/J 3.1.10 (23 June 2005)

Bugs fixed:

  • Initial implemention of ParameterMetadata for PreparedStatement.getParameterMetadata(). Only works fully for CallableStatements, as current server-side prepared statements return every parameter as a VARCHAR type.

  • Fixed connecting without a database specified raised an exception in MysqlIO.changeDatabaseTo().

C.6.3.7. Changes in MySQL Connector/J 3.1.9 (22 June 2005)

Bugs fixed:

  • Production package doesn't include JBoss integration classes. (Bug#11411)

  • Removed nonsensical “costly type conversion” warnings when using usage advisor. (Bug#11411)

  • Fixed PreparedStatement.setClob() not accepting null as a parameter. (Bug#11360)

  • Connector/J dumping query into SQLException twice. (Bug#11360)

  • autoReconnect ping causes exception on connection startup. (Bug#11259)

  • Connection.setCatalog() is now aware of the useLocalSessionState configuration property, which when set to true will prevent the driver from sending USE ... to the server if the requested catalog is the same as the current catalog. (Bug#11115)

  • 3-0-Compat — Compatibility with Connector/J 3.0.x functionality (Bug#11115)

  • maxPerformance — maximum performance without being reckless (Bug#11115)

  • solarisMaxPerformance — maximum performance for Solaris, avoids syscalls where it can (Bug#11115)

  • Added maintainTimeStats configuration property (defaults to true), which tells the driver whether or not to keep track of the last query time and the last successful packet sent to the server's time. If set to false, removes two syscalls per query. (Bug#11115)

  • VARBINARY data corrupted when using server-side prepared statements and ResultSet.getBytes(). (Bug#11115)

  • Added the following configuration bundles, use one or many via the useConfigs configuration property:

    • maxPerformance — maximum performance without being reckless

    • solarisMaxPerformance — maximum performance for Solaris, avoids syscalls where it can

    • 3-0-Compat — Compatibility with Connector/J 3.0.x functionality

    (Bug#11115)

  • Try to handle OutOfMemoryErrors more gracefully. Although not much can be done, they will in most cases close the connection they happened on so that further operations don't run into a connection in some unknown state. When an OOM has happened, any further operations on the connection will fail with a “Connection closed” exception that will also list the OOM exception as the reason for the implicit connection close event. (Bug#10850)

  • Setting cachePrepStmts=true now causes the Connection to also cache the check the driver performs to determine if a prepared statement can be server-side or not, as well as caches server-side prepared statements for the lifetime of a connection. As before, the prepStmtCacheSize parameter controls the size of these caches. (Bug#10850)

  • Don't send COM_RESET_STMT for each execution of a server-side prepared statement if it isn't required. (Bug#10850)

  • 0-length streams not sent to server when using server-side prepared statements. (Bug#10850)

  • Driver detects if you're running MySQL-5.0.7 or later, and does not scan for LIMIT ?[,?] in statements being prepared, as the server supports those types of queries now. (Bug#10850)

  • Reorganized directory layout. Sources now are in src folder. Don't pollute parent directory when building, now output goes to ./build, distribution goes to ./dist. (Bug#10496)

  • Added support/bug hunting feature that generates .sql test scripts to STDERR when autoGenerateTestcaseScript is set to true. (Bug#10496)

  • SQLException is thrown when using property characterSetResults with cp932 or eucjpms. (Bug#10496)

  • The datatype returned for TINYINT(1) columns when tinyInt1isBit=true (the default) can be switched between Types.BOOLEAN and Types.BIT using the new configuration property transformedBitIsBoolean, which defaults to false. If set to false (the default), DatabaseMetaData.getColumns() and ResultSetMetaData.getColumnType() will return Types.BOOLEAN for TINYINT(1) columns. If true, Types.BOOLEAN will be returned instead. Regardless of this configuration property, if tinyInt1isBit is enabled, columns with the type TINYINT(1) will be returned as java.lang.Boolean instances from ResultSet.getObject(...), and ResultSetMetaData.getColumnClassName() will return java.lang.Boolean. (Bug#10485)

  • SQLException thrown when retrieving YEAR(2) with ResultSet.getString(). The driver will now always treat YEAR types as java.sql.Dates and return the correct values for getString(). Alternatively, the yearIsDateType connection property can be set to false and the values will be treated as SHORTs. (Bug#10485)

  • Driver doesn't support {?=CALL(...)} for calling stored functions. This involved adding support for function retrieval to DatabaseMetaData.getProcedures() and getProcedureColumns() as well. (Bug#10310)

  • Unsigned SMALLINT treated as signed for ResultSet.getInt(), fixed all cases for UNSIGNED integer values and server-side prepared statements, as well as ResultSet.getObject() for UNSIGNED TINYINT. (Bug#10156)

  • Made ServerPreparedStatement.asSql() work correctly so auto-explain functionality would work with server-side prepared statements. (Bug#10155)

  • Double quotes not recognized when parsing client-side prepared statements. (Bug#10155)

  • Made JDBC2-compliant wrappers public in order to allow access to vendor extensions. (Bug#10155)

  • DatabaseMetaData.supportsMultipleOpenResults() now returns true. The driver has supported this for some time, DBMD just missed that fact. (Bug#10155)

  • Cleaned up logging of profiler events, moved code to dump a profiler event as a string to com.mysql.jdbc.log.LogUtils so that third parties can use it. (Bug#10155)

  • Made enableStreamingResults() visible on com.mysql.jdbc.jdbc2.optional.StatementWrapper. (Bug#10155)

  • Actually write manifest file to correct place so it ends up in the binary jar file. (Bug#10144)

  • Added createDatabaseIfNotExist property (default is false), which will cause the driver to ask the server to create the database specified in the URL if it doesn't exist. You must have the appropriate privileges for database creation for this to work. (Bug#10144)

  • Memory leak in ServerPreparedStatement if serverPrepare() fails. (Bug#10144)

  • com.mysql.jdbc.PreparedStatement.ParseInfo does unnecessary call to toCharArray(). (Bug#9064)

  • Driver now correctly uses CP932 if available on the server for Windows-31J, CP932 and MS932 java encoding names, otherwise it resorts to SJIS, which is only a close approximation. Currently only MySQL-5.0.3 and newer (and MySQL-4.1.12 or .13, depending on when the character set gets backported) can reliably support any variant of CP932.

  • Overhaul of character set configuration, everything now lives in a properties file.

C.6.3.8. Changes in MySQL Connector/J 3.1.8 (14 April 2005)

Bugs fixed:

  • Should accept null for catalog (meaning use current) in DBMD methods, even though it's not JDBC-compliant for legacy's sake. Disable by setting connection property nullCatalogMeansCurrent to false (which will be the default value in C/J 3.2.x). (Bug#9917)

  • Fixed driver not returning true for -1 when ResultSet.getBoolean() was called on result sets returned from server-side prepared statements. (Bug#9778)

  • Added a Manifest.MF file with implementation information to the .jar file. (Bug#9778)

  • More tests in Field.isOpaqueBinary() to distinguish opaque binary (that is, fields with type CHAR(n) and CHARACTER SET BINARY) from output of various scalar and aggregate functions that return strings. (Bug#9778)

  • DBMD.getTables() shouldn't return tables if views are asked for, even if the database version doesn't support views. (Bug#9778)

  • Should accept null for name patterns in DBMD (meaning “%”), even though it isn't JDBC compliant, for legacy's sake. Disable by setting connection property nullNamePatternMatchesAll to false (which will be the default value in C/J 3.2.x). (Bug#9769)

  • Then fallback to our STDERR logging. (Bug#9704)

  • The performance metrics feature now gathers information about number of tables referenced in a SELECT. (Bug#9704)

  • The logging system is now automatically configured. If the value has been set by the user, via the URL property logger or the system property com.mysql.jdbc.logger, then use that, otherwise, autodetect it using the following steps:

    1. Log4j, if it's available,

    2. Then JDK1.4 logging,

    3. Then fallback to our STDERR logging.

    (Bug#9704)

  • Then JDK1.4 logging, (Bug#9704)

  • Log4j, if it's available, (Bug#9704)

  • Statement.getMoreResults() could throw NPE when existing result set was .close()d. (Bug#9704)

  • Stored procedures with DECIMAL parameters with storage specifications that contained “,” in them would fail. (Bug#9682)

  • PreparedStatement.setObject(int, Object, int type, int scale) now uses scale value for BigDecimal instances. (Bug#9682)

  • Added support for the c3p0 connection pool's (http://c3p0.sf.net/) validation/connection checker interface which uses the lightweight COM_PING call to the server if available. To use it, configure your c3p0 connection pool's connectionTesterClassName property to use com.mysql.jdbc.integration.c3p0.MysqlConnectionTester. (Bug#9320)

  • PreparedStatement.getMetaData() inserts blank row in database under certain conditions when not using server-side prepared statements. (Bug#9320)

  • Better detection of LIMIT inside/outside of quoted strings so that the driver can more correctly determine whether a prepared statement can be prepared on the server or not. (Bug#9320)

  • Connection.canHandleAsPreparedStatement() now makes “best effort” to distinguish LIMIT clauses with placeholders in them from ones without in order to have fewer false positives when generating work-arounds for statements the server cannot currently handle as server-side prepared statements. (Bug#9320)

  • Fixed build.xml to not compile log4j logging if log4j not available. (Bug#9320)

  • Added finalizers to ResultSet and Statement implementations to be JDBC spec-compliant, which requires that if not explicitly closed, these resources should be closed upon garbage collection. (Bug#9319)

  • Stored procedures with same name in different databases confuse the driver when it tries to determine parameter counts/types. (Bug#9319)

  • A continuation of Bug#8868, where functions used in queries that should return non-string types when resolved by temporary tables suddenly become opaque binary strings (work-around for server limitation). Also fixed fields with type of CHAR(n) CHARACTER SET BINARY to return correct/matching classes for RSMD.getColumnClassName() and ResultSet.getObject(). (Bug#9236)

  • Cannot use UTF-8 for characterSetResults configuration property. (Bug#9206)

  • PreparedStatement.addBatch() doesn't work with server-side prepared statements and streaming BINARY data. (Bug#9040)

  • ServerPreparedStatements now correctly “streamBLOB/CLOB data to the server. You can configure the threshold chunk size using the JDBC URL property blobSendChunkSize (the default is 1MB). (Bug#8868)

  • DATE_FORMAT() queries returned as BLOBs from getObject(). (Bug#8868)

  • Server-side session variables can be preset at connection time by passing them as a comma-delimited list for the connection property sessionVariables. (Bug#8868)

  • BlobFromLocator now uses correct identifier quoting when generating prepared statements. (Bug#8868)

  • Fixed regression in ping() for users using autoReconnect=true. (Bug#8868)

  • Check for empty strings ('') when converting CHAR/VARCHAR column data to numbers, throw exception if emptyStringsConvertToZero configuration property is set to false (for backward-compatibility with 3.0, it is now set to true by default, but will most likely default to false in 3.2). (Bug#8803)

  • DATA_TYPE column from DBMD.getBestRowIdentifier() causes ArrayIndexOutOfBoundsException when accessed (and in fact, didn't return any value). (Bug#8803)

  • DBMD.supportsMixedCase*Identifiers() returns wrong value on servers running on case-sensitive filesystems. (Bug#8800)

  • DBMD.supportsResultSetConcurrency() not returning true for forward-only/read-only result sets (we obviously support this). (Bug#8792)

  • Fixed ResultSet.getTime() on a NULL value for server-side prepared statements throws NPE.

  • Made Connection.ping() a public method.

  • Added support for new precision-math DECIMAL type in MySQL 5.0.3 and up.

  • Fixed DatabaseMetaData.getTables() returning views when they were not asked for as one of the requested table types.

C.6.3.9. Changes in MySQL Connector/J 3.1.7 (18 February 2005)

Bugs fixed:

  • PreparedStatements not creating streaming result sets. (Bug#8487)

  • Don't pass NULL to String.valueOf() in ResultSet.getNativeConvertToString(), as it stringifies it (that is, returns null), which is not correct for the method in question. (Bug#8487)

  • Fixed NPE in ResultSet.realClose() when using usage advisor and result set was already closed. (Bug#8428)

  • ResultSet.getString() doesn't maintain format stored on server, bug fix only enabled when noDatetimeStringSync property is set to true (the default is false). (Bug#8428)

  • Added support for BIT type in MySQL-5.0.3. The driver will treat BIT(1-8) as the JDBC standard BIT type (which maps to java.lang.Boolean), as the server does not currently send enough information to determine the size of a bitfield when < 9 bits are declared. BIT(>9) will be treated as VARBINARY, and will return byte[] when getObject() is called. (Bug#8424)

  • Added useLocalSessionState configuration property, when set to true the JDBC driver trusts that the application is well-behaved and only sets autocommit and transaction isolation levels using the methods provided on java.sql.Connection, and therefore can manipulate these values in many cases without incurring round-trips to the database server. (Bug#8424)

  • Added enableStreamingResults() to Statement for connection pool implementations that check Statement.setFetchSize() for specification-compliant values. Call Statement.setFetchSize(>=0) to disable the streaming results for that statement. (Bug#8424)

  • ResultSet.getBigDecimal() throws exception when rounding would need to occur to set scale. The driver now chooses a rounding mode of “half up” if non-rounding BigDecimal.setScale() fails. (Bug#8424)

  • Fixed synchronization issue with ServerPreparedStatement.serverPrepare() that could cause deadlocks/crashes if connection was shared between threads. (Bug#8096)

  • Emulated locators corrupt binary data when using server-side prepared statements. (Bug#8096)

  • Infinite recursion when “falling back” to master in failover configuration. (Bug#7952)

  • Disable multi-statements (if enabled) for MySQL-4.1 versions prior to version 4.1.10 if the query cache is enabled, as the server returns wrong results in this configuration. (Bug#7952)

  • Removed dontUnpackBinaryResults functionality, the driver now always stores results from server-side prepared statements as is from the server and unpacks them on demand. (Bug#7952)

  • Fixed duplicated code in configureClientCharset() that prevented useOldUTF8Behavior=true from working properly. (Bug#7952)

  • Added holdResultsOpenOverStatementClose property (default is false), that keeps result sets open over statement.close() or new execution on same statement (suggested by Kevin Burton). (Bug#7715)

  • Detect new sql_mode variable in string form (it used to be integer) and adjust quoting method for strings appropriately. (Bug#7715)

  • Timestamps converted incorrectly to strings with server-side prepared statements and updatable result sets. (Bug#7715)

  • Timestamp key column data needed _binary stripped for UpdatableResultSet.refreshRow(). (Bug#7686)

  • Choose correct “direction” to apply time adjustments when both client and server are in GMT time zone when using ResultSet.get(..., cal) and PreparedStatement.set(...., cal). (Bug#4718)

  • Remove _binary introducer from parameters used as in/out parameters in CallableStatement. (Bug#4718)

  • Always return byte[]s for output parameters registered as *BINARY. (Bug#4718)

  • By default, the driver now scans SQL you are preparing via all variants of Connection.prepareStatement() to determine if it is a supported type of statement to prepare on the server side, and if it is not supported by the server, it instead prepares it as a client-side emulated prepared statement. You can disable this by passing emulateUnsupportedPstmts=false in your JDBC URL. (Bug#4718)

  • Added dontTrackOpenResources option (default is false, to be JDBC compliant), which helps with memory use for non-well-behaved apps (that is, applications that don't close Statement objects when they should). (Bug#4718)

  • Send correct value for “booleantrue to server for PreparedStatement.setObject(n, "true", Types.BIT). (Bug#4718)

  • Fixed bug with Connection not caching statements from prepareStatement() when the statement wasn't a server-side prepared statement. (Bug#4718)

C.6.3.10. Changes in MySQL Connector/J 3.1.6 (23 December 2004)

Bugs fixed:

  • DBMD.getProcedures() doesn't respect catalog parameter. (Bug#7026)

  • Fixed hang on SocketInputStream.read() with Statement.setMaxRows() and multiple result sets when driver has to truncate result set directly, rather than tacking a LIMIT n on the end of it.

C.6.3.11. Changes in MySQL Connector/J 3.1.5 (02 December 2004)

Bugs fixed:

  • Use 1MB packet for sending file for LOAD DATA LOCAL INFILE if that is < max_allowed_packet on server. (Bug#6537)

  • SUM() on DECIMAL with server-side prepared statement ignores scale if zero-padding is needed (this ends up being due to conversion to DOUBLE by server, which when converted to a string to parse into BigDecimal, loses all “padding” zeros). (Bug#6537)

  • Use DatabaseMetaData.getIdentifierQuoteString() when building DBMD queries. (Bug#6537)

  • Use our own implementation of buffered input streams to get around blocking behavior of java.io.BufferedInputStream. Disable this with useReadAheadInput=false. (Bug#6399)

  • Make auto-deserialization of java.lang.Objects stored in BLOB columns configurable via autoDeserialize property (defaults to false). (Bug#6399)

  • ResultSetMetaData.getColumnDisplaySize() returns incorrect values for multi-byte charsets. (Bug#6399)

  • Re-work Field.isOpaqueBinary() to detect CHAR(n) CHARACTER SET BINARY to support fixed-length binary fields for ResultSet.getObject(). (Bug#6399)

  • Failing to connect to the server when one of the addresses for the given host name is IPV6 (which the server does not yet bind on). The driver now loops through all IP addresses for a given host, and stops on the first one that accepts() a socket.connect(). (Bug#6348)

  • Removed unwanted new Throwable() in ResultSet constructor due to bad merge (caused a new object instance that was never used for every result set created). Found while profiling for Bug#6359. (Bug#6225)

  • ServerSidePreparedStatement allocating short-lived objects unnecessarily. (Bug#6225)

  • Use null-safe-equals for key comparisons in updatable result sets. (Bug#6225)

  • Fixed too-early creation of StringBuffer in EscapeProcessor.escapeSQL(), also return String when escaping not needed (to avoid unnecessary object allocations). Found while profiling for Bug#6359. (Bug#6225)

  • UNSIGNED BIGINT unpacked incorrectly from server-side prepared statement result sets. (Bug#5729)

  • Added experimental configuration property dontUnpackBinaryResults, which delays unpacking binary result set values until they're asked for, and only creates object instances for non-numerical values (it is set to false by default). For some usecase/jvm combinations, this is friendlier on the garbage collector. (Bug#5706)

  • Don't throw exceptions for Connection.releaseSavepoint(). (Bug#5706)

  • Inefficient detection of pre-existing string instances in ResultSet.getNativeString(). (Bug#5706)

  • Use a per-session Calendar instance by default when decoding dates from ServerPreparedStatements (set to old, less performant behavior by setting property dynamicCalendars=true). (Bug#5706)

  • Fixed batched updates with server prepared statements weren't looking if the types had changed for a given batched set of parameters compared to the previous set, causing the server to return the error “Wrong arguments to mysql_stmt_execute()”. (Bug#5235)

  • Handle case when string representation of timestamp contains trailing “.” with no numbers following it. (Bug#5235)

  • Server-side prepared statements did not honor zeroDateTimeBehavior property, and would cause class-cast exceptions when using ResultSet.getObject(), as the all-zero string was always returned. (Bug#5235)

  • Fix comparisons made between string constants and dynamic strings that are converted with either toUpperCase() or toLowerCase() to use Locale.ENGLISH, as some locales “override” case rules for English. Also use StringUtils.indexOfIgnoreCase() instead of .toUpperCase().indexOf(), avoids creating a very short-lived transient String instance.

C.6.3.12. Changes in MySQL Connector/J 3.1.4 (04 September 2004)

Bugs fixed:

  • Fixed ServerPreparedStatement to read prepared statement metadata off the wire, even though it's currently a placeholder instead of using MysqlIO.clearInputStream() which didn't work at various times because data wasn't available to read from the server yet. This fixes sporadic errors users were having with ServerPreparedStatements throwing ArrayIndexOutOfBoundExceptions. (Bug#5032)

  • Added three ways to deal with all-zero datetimes when reading them from a ResultSet: exception (the default), which throws an SQLException with an SQLState of S1009; convertToNull, which returns NULL instead of the date; and round, which rounds the date to the nearest closest value which is '0001-01-01'. (Bug#5032)

  • The driver is more strict about truncation of numerics on ResultSet.get*(), and will throw an SQLException when truncation is detected. You can disable this by setting jdbcCompliantTruncation to false (it is enabled by default, as this functionality is required for JDBC compliance). (Bug#5032)

  • You can now use URLs in LOAD DATA LOCAL INFILE statements, and the driver will use Java's built-in handlers for retreiving the data and sending it to the server. This feature is not enabled by default, you must set the allowUrlInLocalInfile connection property to true. (Bug#5032)

  • ResultSet.getObject() doesn't return type Boolean for pseudo-bit types from prepared statements on 4.1.x (shortcut for avoiding extra type conversion when using binary-encoded result sets obscured test in getObject() for “pseudo” bit type). (Bug#5032)

  • Use com.mysql.jdbc.Message's classloader when loading resource bundle, should fix sporadic issues when the caller's classloader can't locate the resource bundle. (Bug#5032)

  • ServerPreparedStatements dealing with return of DECIMAL type don't work. (Bug#5012)

  • Track packet sequence numbers if enablePacketDebug=true, and throw an exception if packets received out-of-order. (Bug#4689)

  • ResultSet.wasNull() does not work for primatives if a previous null was returned. (Bug#4689)

  • Optimized integer number parsing, enable “old” slower integer parsing using JDK classes via useFastIntParsing=false property. (Bug#4642)

  • Added useOnlyServerErrorMessages property, which causes message text in exceptions generated by the server to only contain the text sent by the server (as opposed to the SQLState's “standard” description, followed by the server's error message). This property is set to true by default. (Bug#4642)

  • ServerPreparedStatement.execute*() sometimes threw ArrayIndexOutOfBoundsException when unpacking field metadata. (Bug#4642)

  • Connector/J 3.1.3 beta does not handle integers correctly (caused by changes to support unsigned reads in Buffer.readInt() -> Buffer.readShort()). (Bug#4510)

  • Added support in DatabaseMetaData.getTables() and getTableTypes() for views, which are now available in MySQL server 5.0.x. (Bug#4510)

  • ResultSet.getObject() returns wrong type for strings when using prepared statements. (Bug#4482)

  • Calling MysqlPooledConnection.close() twice (even though an application error), caused NPE. Fixed. (Bug#4482)

C.6.3.13. Changes in MySQL Connector/J 3.1.3 (07 July 2004)

Bugs fixed:

  • Support new time zone variables in MySQL-4.1.3 when useTimezone=true. (Bug#4311)

  • Error in retrieval of mediumint column with prepared statements and binary protocol. (Bug#4311)

  • Support for unsigned numerics as return types from prepared statements. This also causes a change in ResultSet.getObject() for the bigint unsigned type, which used to return BigDecimal instances, it now returns instances of java.lang.BigInteger. (Bug#4311)

  • Externalized more messages (on-going effort). (Bug#4119)

  • Null bitmask sent for server-side prepared statements was incorrect. (Bug#4119)

  • Added constants for MySQL error numbers (publicly accessible, see com.mysql.jdbc.MysqlErrorNumbers), and the ability to generate the mappings of vendor error codes to SQLStates that the driver uses (for documentation purposes). (Bug#4119)

  • Added packet debuging code (see the enablePacketDebug property documentation). (Bug#4119)

  • Use SQL Standard SQL states by default, unless useSqlStateCodes property is set to false. (Bug#4119)

  • Mangle output parameter names for CallableStatements so they will not clash with user variable names.

  • Added support for INOUT parameters in CallableStatements.

C.6.3.14. Changes in MySQL Connector/J 3.1.2 (09 June 2004)

Bugs fixed:

  • Don't enable server-side prepared statements for server version 5.0.0 or 5.0.1, as they aren't compatible with the '4.1.2+' style that the driver uses (the driver expects information to come back that isn't there, so it hangs). (Bug#3804)

  • getWarnings() returns SQLWarning instead of DataTruncation. (Bug#3804)

  • getProcedureColumns() doesn't work with wildcards for procedure name. (Bug#3540)

  • getProcedures() does not return any procedures in result set. (Bug#3539)

  • Fixed DatabaseMetaData.getProcedures() when run on MySQL-5.0.0 (output of SHOW PROCEDURE STATUS changed between 5.0.0 and 5.0.1. (Bug#3520)

  • Added connectionCollation property to cause driver to issue set collation_connection=... query on connection init if default collation for given charset is not appropriate. (Bug#3520)

  • DBMD.getSQLStateType() returns incorrect value. (Bug#3520)

  • Correctly map output parameters to position given in prepareCall() versus. order implied during registerOutParameter(). (Bug#3146)

  • Cleaned up detection of server properties. (Bug#3146)

  • Correctly detect initial character set for servers >= 4.1.0. (Bug#3146)

  • Support placeholder for parameter metadata for server >= 4.1.2. (Bug#3146)

  • Added gatherPerformanceMetrics property, along with properties to control when/where this info gets logged (see docs for more info).

  • Fixed case when no parameters could cause a NullPointerException in CallableStatement.setOutputParameters().

  • Enabled callable statement caching via cacheCallableStmts property.

  • Fixed sending of split packets for large queries, enabled nio ability to send large packets as well.

  • Added .toString() functionality to ServerPreparedStatement, which should help if you're trying to debug a query that is a prepared statement (it shows SQL as the server would process).

  • Added logSlowQueries property, along with slowQueriesThresholdMillis property to control when a query should be considered “slow.

  • Removed wrapping of exceptions in MysqlIO.changeUser().

  • Fixed stored procedure parameter parsing info when size was specified for a parameter (for example, char(), varchar()).

  • ServerPreparedStatements weren't actually de-allocating server-side resources when .close() was called.

  • Fixed case when no output parameters specified for a stored procedure caused a bogus query to be issued to retrieve out parameters, leading to a syntax error from the server.

C.6.3.15. Changes in MySQL Connector/J 3.1.1 (14 February 2004)

Bugs fixed:

  • Use DocBook version of docs for shipped versions of drivers. (Bug#2671)

  • NULL fields were not being encoded correctly in all cases in server-side prepared statements. (Bug#2671)

  • Fixed rare buffer underflow when writing numbers into buffers for sending prepared statement execution requests. (Bug#2671)

  • Fixed ConnectionProperties that weren't properly exposed via accessors, cleaned up ConnectionProperties code. (Bug#2623)

  • Class-cast exception when using scrolling result sets and server-side prepared statements. (Bug#2623)

  • Merged unbuffered input code from 3.0. (Bug#2623)

  • Enabled streaming of result sets from server-side prepared statements. (Bug#2606)

  • Server-side prepared statements were not returning datatype YEAR correctly. (Bug#2606)

  • Fixed charset conversion issue in getTables(). (Bug#2502)

  • Implemented multiple result sets returned from a statement or stored procedure. (Bug#2502)

  • Implemented Connection.prepareCall(), and DatabaseMetaData. getProcedures() and getProcedureColumns(). (Bug#2359)

  • Merged prepared statement caching, and .getMetaData() support from 3.0 branch. (Bug#2359)

  • Fixed off-by-1900 error in some cases for years in TimeUtil.fastDate/TimeCreate() when unpacking results from server-side prepared statements. (Bug#2359)

  • Reset long binary parameters in ServerPreparedStatement when clearParameters() is called, by sending COM_RESET_STMT to the server. (Bug#2359)

  • NULL values for numeric types in binary encoded result sets causing NullPointerExceptions. (Bug#2359)

  • Display where/why a connection was implicitly closed (to aid debugging). (Bug#1673)

  • DatabaseMetaData.getColumns() is not returning correct column ordinal info for non-'%' column name patterns. (Bug#1673)

  • Fixed NullPointerException in ServerPreparedStatement.setTimestamp(), as well as year and month descrepencies in ServerPreparedStatement.setTimestamp(), setDate(). (Bug#1673)

  • Added ability to have multiple database/JVM targets for compliance and regression/unit tests in build.xml. (Bug#1673)

  • Fixed sending of queries larger than 16M. (Bug#1673)

  • Merged fix of datatype mapping from MySQL type FLOAT to java.sql.Types.REAL from 3.0 branch. (Bug#1673)

  • Fixed NPE and year/month bad conversions when accessing some datetime functionality in ServerPreparedStatements and their resultant result sets. (Bug#1673)

  • Added named and indexed input/output parameter support to CallableStatement. MySQL-5.0.x or newer. (Bug#1673)

  • CommunicationsException implemented, that tries to determine why communications was lost with a server, and displays possible reasons when .getMessage() is called. (Bug#1673)

  • Detect collation of column for RSMD.isCaseSensitive(). (Bug#1673)

  • Optimized Buffer.readLenByteArray() to return shared empty byte array when length is 0.

  • Fix support for table aliases when checking for all primary keys in UpdatableResultSet.

  • Unpack “unknown” data types from server prepared statements as Strings.

  • Implemented Statement.getWarnings() for MySQL-4.1 and newer (using SHOW WARNINGS).

  • Ensure that warnings are cleared before executing queries on prepared statements, as-per JDBC spec (now that we support warnings).

  • Correctly initialize datasource properties from JNDI Refs, including explicitly specified URLs.

  • Implemented long data (Blobs, Clobs, InputStreams, Readers) for server prepared statements.

  • Deal with 0-length tokens in EscapeProcessor (caused by callable statement escape syntax).

  • DatabaseMetaData now reports supportsStoredProcedures() for MySQL versions >= 5.0.0

  • Support for mysql_change_user(). See the changeUser() method in com.mysql.jdbc.Connection.

  • Removed useFastDates connection property.

  • Support for NIO. Use useNIO=true on platforms that support NIO.

  • Check for closed connection on delete/update/insert row operations in UpdatableResultSet.

  • Support for transaction savepoints (MySQL >= 4.0.14 or 4.1.1).

  • Support “oldprofileSql capitalization in ConnectionProperties. This property is deprecated, you should use profileSQL if possible.

  • Fixed character encoding issues when converting bytes to ASCII when MySQL doesn't provide the character set, and the JVM is set to a multi-byte encoding (usually affecting retrieval of numeric values).

  • Centralized setting of result set type and concurrency.

  • Fixed bug with UpdatableResultSets not using client-side prepared statements.

  • Default result set type changed to TYPE_FORWARD_ONLY (JDBC compliance).

  • Fixed IllegalAccessError to Calendar.getTimeInMillis() in DateTimeValue (for JDK < 1.4).

  • Allow contents of PreparedStatement.setBlob() to be retained between calls to .execute*().

  • Fixed stack overflow in Connection.prepareCall() (bad merge).

  • Refactored how connection properties are set and exposed as DriverPropertyInfo as well as Connection and DataSource properties.

  • Reduced number of methods called in average query to be more efficient.

  • Prepared Statements will be re-prepared on auto-reconnect. Any errors encountered are postponed until first attempt to re-execute the re-prepared statement.

C.6.3.16. Changes in MySQL Connector/J 3.1.0 (18 February 2003)

Bugs fixed:

  • Added useServerPrepStmts property (default false). The driver will use server-side prepared statements when the server version supports them (4.1 and newer) when this property is set to true. It is currently set to false by default until all bind/fetch functionality has been implemented. Currently only DML prepared statements are implemented for 4.1 server-side prepared statements.

  • Added requireSSL property.

  • Track open Statements, close all when Connection.close() is called (JDBC compliance).

C.6.4. Changes in MySQL Connector/J 3.0.x

C.6.4.1. Changes in MySQL Connector/J 3.0.17 (23 June 2005)

Bugs fixed:

  • Workaround for server Bug#9098: Default values of CURRENT_* for DATE, TIME, DATETIME, and TIMESTAMP columns can't be distinguished from string values, so UpdatableResultSet.moveToInsertRow() generates bad SQL for inserting default values. (Bug#8812)

  • NON_UNIQUE column from DBMD.getIndexInfo() returned inverted value. (Bug#8812)

  • EUCKR charset is sent as SET NAMES euc_kr which MySQL-4.1 and newer doesn't understand. (Bug#8629)

  • Added support for the EUC_JP_Solaris character encoding, which maps to a MySQL encoding of eucjpms (backported from 3.1 branch). This only works on servers that support eucjpms, namely 5.0.3 or later. (Bug#8629)

  • Use hex escapes for PreparedStatement.setBytes() for double-byte charsets including “aliasesWindows-31J, CP934, MS932. (Bug#8629)

  • DatabaseMetaData.supportsSelectForUpdate() returns correct value based on server version. (Bug#8629)

  • Which requires hex escaping of binary data when using multi-byte charsets with prepared statements. (Bug#8064)

  • Fixed duplicated code in configureClientCharset() that prevented useOldUTF8Behavior=true from working properly. (Bug#7952)

  • Backported SQLState codes mapping from Connector/J 3.1, enable with useSqlStateCodes=true as a connection property, it defaults to false in this release, so that we don't break legacy applications (it defaults to true starting with Connector/J 3.1). (Bug#7686)

  • Timestamp key column data needed _binary stripped for UpdatableResultSet.refreshRow(). (Bug#7686)

  • MS932, SHIFT_JIS, and Windows_31J not recognized as aliases for sjis. (Bug#7607)

  • Handle streaming result sets with more than 2 billion rows properly by fixing wraparound of row number counter. (Bug#7601)

  • PreparedStatement.fixDecimalExponent() adding extra +, making number unparseable by MySQL server. (Bug#7601)

  • Escape sequence {fn convert(..., type)} now supports ODBC-style types that are prepended by SQL_. (Bug#7601)

  • Statements created from a pooled connection were returning physical connection instead of logical connection when getConnection() was called. (Bug#7316)

  • Support new protocol type MYSQL_TYPE_VARCHAR. (Bug#7081)

  • Added useOldUTF8Behavior' configuration property, which causes JDBC driver to act like it did with MySQL-4.0.x and earlier when the character encoding is utf-8 when connected to MySQL-4.1 or newer. (Bug#7081)

  • DatabaseMetaData.getIndexInfo() ignored unique parameter. (Bug#7081)

  • PreparedStatement.fixDecimalExponent() adding extra +, making number unparseable by MySQL server. (Bug#7061)

  • PreparedStatements don't encode Big5 (and other multi-byte) character sets correctly in static SQL strings. (Bug#7033)

  • Connections starting up failed-over (due to down master) never retry master. (Bug#6966)

  • Adding CP943 to aliases for sjis. (Bug#6549, Bug#7607)

  • Timestamp/Time conversion goes in the wrong “direction” when useTimeZone=true and server time zone differs from client time zone. (Bug#5874)

C.6.4.2. Changes in MySQL Connector/J 3.0.16 (15 November 2004)

Bugs fixed:

  • Made TINYINT(1) -> BIT/Boolean conversion configurable via tinyInt1isBit property (default true to be JDBC compliant out of the box). (Bug#5664)

  • Off-by-one bug in Buffer.readString(string). (Bug#5664)

  • ResultSet.updateByte() when on insert row throws ArrayOutOfBoundsException. (Bug#5664)

  • Fixed regression where useUnbufferedInput was defaulting to false. (Bug#5664)

  • ResultSet.getTimestamp() on a column with TIME in it fails. (Bug#5664)

  • Fixed DatabaseMetaData.getTypes() returning incorrect (this is, non-negative) scale for the NUMERIC type. (Bug#5664)

  • Only set character_set_results during connection establishment if server version >= 4.1.1. (Bug#5664)

  • Fixed ResultSetMetaData.isReadOnly() to detect non-writable columns when connected to MySQL-4.1 or newer, based on existence of “original” table and column names.

  • Re-issue character set configuration commands when re-using pooled connections and/or Connection.changeUser() when connected to MySQL-4.1 or newer.

C.6.4.3. Changes in MySQL Connector/J 3.0.15 (04 September 2004)

Bugs fixed:

  • ResultSet.getMetaData() should not return incorrectly initialized metadata if the result set has been closed, but should instead throw an SQLException. Also fixed for getRow() and getWarnings() and traversal methods by calling checkClosed() before operating on instance-level fields that are nullified during .close(). (Bug#5069)

  • Use _binary introducer for PreparedStatement.setBytes() and set*Stream() when connected to MySQL-4.1.x or newer to avoid misinterpretation during character conversion. (Bug#5069)

  • Parse new time zone variables from 4.1.x servers. (Bug#5069)

  • ResultSet should release Field[] instance in .close(). (Bug#5022)

  • RSMD.getPrecision() returning 0 for non-numeric types (should return max length in chars for non-binary types, max length in bytes for binary types). This fix also fixes mapping of RSMD.getColumnType() and RSMD.getColumnTypeName() for the BLOB types based on the length sent from the server (the server doesn't distinguish between TINYBLOB, BLOB, MEDIUMBLOB or LONGBLOB at the network protocol level). (Bug#4880)

  • Production” is now “GA” (General Availability) in naming scheme of distributions. (Bug#4860, Bug#4138)

  • DBMD.getColumns() returns incorrect JDBC type for unsigned columns. This affects type mappings for all numeric types in the RSMD.getColumnType() and RSMD.getColumnTypeNames() methods as well, to ensure that “like” types from DBMD.getColumns() match up with what RSMD.getColumnType() and getColumnTypeNames() return. (Bug#4860, Bug#4138)

  • Calling .close() twice on a PooledConnection causes NPE. (Bug#4808)

  • DOUBLE mapped twice in DBMD.getTypeInfo(). (Bug#4742)

  • Added FLOSS license exemption. (Bug#4742)

  • Removed redundant calls to checkRowPos() in ResultSet. (Bug#4334)

  • Failover for autoReconnect not using port numbers for any hosts, and not retrying all hosts.

    Warning

    This required a change to the SocketFactory connect() method signature, which is now public Socket connect(String host, int portNumber, Properties props); therefore, any third-party socket factories will have to be changed to support this signature.

    (Bug#4334)

  • Logical connections created by MysqlConnectionPoolDataSource will now issue a rollback() when they are closed and sent back to the pool. If your application server/connection pool already does this for you, you can set the rollbackOnPooledClose property to false to avoid the overhead of an extra rollback(). (Bug#4334)

  • StringUtils.escapeEasternUnicodeByteStream was still broken for GBK. (Bug#4010)

C.6.4.4. Changes in MySQL Connector/J 3.0.14 (28 May 2004)

Bugs fixed:

  • Fixed URL parsing error.

C.6.4.5. Changes in MySQL Connector/J 3.0.13 (27 May 2004)

Bugs fixed:

  • No Database Selected when using MysqlConnectionPoolDataSource. (Bug#3920)

  • PreparedStatement.getGeneratedKeys() method returns only 1 result for batched insertions. (Bug#3873)

  • Using a MySQLDatasource without server name fails. (Bug#3848)

C.6.4.6. Changes in MySQL Connector/J 3.0.12 (18 May 2004)

Bugs fixed:

  • Inconsistent reporting of data type. The server still doesn't return all types for *BLOBs *TEXT correctly, so the driver won't return those correctly. (Bug#3570)

  • UpdatableResultSet not picking up default values for moveToInsertRow(). (Bug#3557)

  • Not specifying database in URL caused MalformedURL exception. (Bug#3554)

  • Auto-convert MySQL encoding names to Java encoding names if used for characterEncoding property. (Bug#3554)

  • Use junit.textui.TestRunner for all unit tests (to allow them to be run from the command line outside of Ant or Eclipse). (Bug#3554)

  • Added encoding names that are recognized on some JVMs to fix case where they were reverse-mapped to MySQL encoding names incorrectly. (Bug#3554)

  • Made StringRegressionTest 4.1-unicode aware. (Bug#3520)

  • Fixed regression in PreparedStatement.setString() and eastern character encodings. (Bug#3520)

  • DBMD.getSQLStateType() returns incorrect value. (Bug#3520)

  • Renamed StringUtils.escapeSJISByteStream() to more appropriate escapeEasternUnicodeByteStream(). (Bug#3511)

  • StringUtils.escapeSJISByteStream() not covering all eastern double-byte charsets correctly. (Bug#3511)

  • Return creating statement for ResultSets created by getGeneratedKeys(). (Bug#2957)

  • Use SET character_set_results during initialization to allow any charset to be returned to the driver for result sets. (Bug#2670)

  • Don't truncate BLOB or CLOB values when using setBytes() and/or setBinary/CharacterStream(). . (Bug#2670)

  • Dynamically configure character set mappings for field-level character sets on MySQL-4.1.0 and newer using SHOW COLLATION when connecting. (Bug#2670)

  • Map binary character set to US-ASCII to support DATETIME charset recognition for servers >= 4.1.2. (Bug#2670)

  • Use charsetnr returned during connect to encode queries before issuing SET NAMES on MySQL >= 4.1.0. (Bug#2670)

  • Add helper methods to ResultSetMetaData (getColumnCharacterEncoding() and getColumnCharacterSet()) to allow end-users to see what charset the driver thinks it should be using for the column. (Bug#2670)

  • Only set character_set_results for MySQL >= 4.1.0. (Bug#2670)

  • Allow url parameter for MysqlDataSource and MysqlConnectionPool DataSource so that passing of other properties is possible from inside appservers.

  • Don't escape SJIS/GBK/BIG5 when using MySQL-4.1 or newer.

  • Backport documentation tooling from 3.1 branch.

  • Added failOverReadOnly property, to allow end-user to configure state of connection (read-only/writable) when failed over.

  • Allow java.util.Date to be sent in as parameter to PreparedStatement.setObject(), converting it to a Timestamp to maintain full precision. . (Bug#103)

  • Add unsigned attribute to DatabaseMetaData.getColumns() output in the TYPE_NAME column.

  • Map duplicate key and foreign key errors to SQLState of 23000.

  • Backported “change user” and “reset server state” functionality from 3.1 branch, to allow clients of MysqlConnectionPoolDataSource to reset server state on getConnection() on a pooled connection.

C.6.4.7. Changes in MySQL Connector/J 3.0.11 (19 February 2004)

Bugs fixed:

  • Return java.lang.Double for FLOAT type from ResultSetMetaData.getColumnClassName(). (Bug#2855)

  • Return [B instead of java.lang.Object for BINARY, VARBINARY and LONGVARBINARY types from ResultSetMetaData.getColumnClassName() (JDBC compliance). (Bug#2855)

  • Issue connection events on all instances created from a ConnectionPoolDataSource. (Bug#2855)

  • Return java.lang.Integer for TINYINT and SMALLINT types from ResultSetMetaData.getColumnClassName(). (Bug#2852)

  • Added useUnbufferedInput parameter, and now use it by default (due to JVM issue http://developer.java.sun.com/developer/bugParade/bugs/4401235.html) (Bug#2578)

  • Fixed failover always going to last host in list. (Bug#2578)

  • Detect on/off or 1, 2, 3 form of lower_case_table_names value on server. (Bug#2578)

  • AutoReconnect time was growing faster than exponentially. (Bug#2447)

  • Trigger a SET NAMES utf8 when encoding is forced to utf8 or utf-8 via the characterEncoding property. Previously, only the Java-style encoding name of utf-8 would trigger this.

C.6.4.8. Changes in MySQL Connector/J 3.0.10 (13 January 2004)

Bugs fixed:

  • Enable caching of the parsing stage of prepared statements via the cachePrepStmts, prepStmtCacheSize, and prepStmtCacheSqlLimit properties (disabled by default). (Bug#2006)

  • Fixed security exception when used in Applets (applets can't read the system property file.encoding which is needed for LOAD DATA LOCAL INFILE). (Bug#2006)

  • Speed up parsing of PreparedStatements, try to use one-pass whenever possible. (Bug#2006)

  • Fixed exception Unknown character set 'danish' on connect with JDK-1.4.0 (Bug#2006)

  • Fixed mappings in SQLError to report deadlocks with SQLStates of 41000. (Bug#2006)

  • Removed static synchronization bottleneck from instance factory method of SingleByteCharsetConverter. (Bug#2006)

  • Removed static synchronization bottleneck from PreparedStatement.setTimestamp(). (Bug#2006)

  • ResultSet.findColumn() should use first matching column name when there are duplicate column names in SELECT query (JDBC-compliance). (Bug#2006)

  • maxRows property would affect internal statements, so check it for all statement creation internal to the driver, and set to 0 when it is not. (Bug#2006)

  • Use constants for SQLStates. (Bug#2006)

  • Map charset ko18_ru to ko18r when connected to MySQL-4.1.0 or newer. (Bug#2006)

  • Ensure that Buffer.writeString() saves room for the \0. (Bug#2006)

  • ArrayIndexOutOfBounds when parameter number == number of parameters + 1. (Bug#1958)

  • Connection property maxRows not honored. (Bug#1933)

  • Statements being created too many times in DBMD.extractForeignKeyFromCreateTable(). (Bug#1925)

  • Support escape sequence {fn convert ... }. (Bug#1914)

  • Implement ResultSet.updateClob(). (Bug#1913)

  • Autoreconnect code didn't set catalog upon reconnect if it had been changed. (Bug#1913)

  • ResultSet.getObject() on TINYINT and SMALLINT columns should return Java type Integer. (Bug#1913)

  • Added more descriptive error message Server Configuration Denies Access to DataSource, as well as retrieval of message from server. (Bug#1913)

  • ResultSetMetaData.isCaseSensitive() returned wrong value for CHAR/VARCHAR columns. (Bug#1913)

  • Added alwaysClearStream connection property, which causes the driver to always empty any remaining data on the input stream before each query. (Bug#1913)

  • DatabaseMetaData.getSystemFunction() returning bad function VResultsSion. (Bug#1775)

  • Foreign Keys column sequence is not consistent in DatabaseMetaData.getImported/Exported/CrossReference(). (Bug#1731)

  • Fix for ArrayIndexOutOfBounds exception when using Statement.setMaxRows(). (Bug#1695)

  • Subsequent call to ResultSet.updateFoo() causes NPE if result set is not updatable. (Bug#1630)

  • Fix for 4.1.1-style authentication with no password. (Bug#1630)

  • Cross-database updatable result sets are not checked for updatability correctly. (Bug#1592)

  • DatabaseMetaData.getColumns() should return Types.LONGVARCHAR for MySQL LONGTEXT type. (Bug#1592)

  • Fixed regression of Statement.getGeneratedKeys() and REPLACE statements. (Bug#1576)

  • Barge blobs and split packets not being read correctly. (Bug#1576)

  • Backported fix for aliased tables and UpdatableResultSets in checkUpdatability() method from 3.1 branch. (Bug#1534)

  • Friendlier” exception message for PacketTooLargeException. (Bug#1534)

  • Don't count quoted IDs when inside a 'string' in PreparedStatement parsing. (Bug#1511)

C.6.4.9. Changes in MySQL Connector/J 3.0.9 (07 October 2003)

Bugs fixed:

  • ResultSet.get/setString mashing char 127. (Bug#1247)

  • Added property to “clobber” streaming results, by setting the clobberStreamingResults property to true (the default is false). This will cause a “streamingResultSet to be automatically closed, and any oustanding data still streaming from the server to be discarded if another query is executed before all the data has been read from the server. (Bug#1247)

  • Added com.mysql.jdbc.util.BaseBugReport to help creation of testcases for bug reports. (Bug#1247)

  • Backported authentication changes for 4.1.1 and newer from 3.1 branch. (Bug#1247)

  • Made databaseName, portNumber, and serverName optional parameters for MysqlDataSourceFactory. (Bug#1246)

  • Optimized CLOB.setChracterStream(). (Bug#1131)

  • Fixed CLOB.truncate(). (Bug#1130)

  • Fixed deadlock issue with Statement.setMaxRows(). (Bug#1099)

  • DatabaseMetaData.getColumns() getting confused about the keyword “set” in character columns. (Bug#1099)

  • Clip +/- INF (to smallest and largest representative values for the type in MySQL) and NaN (to 0) for setDouble/setFloat(), and issue a warning on the statement when the server does not support +/- INF or NaN. (Bug#884)

  • Don't fire connection closed events when closing pooled connections, or on PooledConnection.getConnection() with already open connections. (Bug#884)

  • Double-escaping of '\' when charset is SJIS or GBK and '\' appears in non-escaped input. (Bug#879)

  • When emptying input stream of unused rows for “streaming” result sets, have the current thread yield() every 100 rows in order to not monopolize CPU time. (Bug#879)

  • Issue exception on ResultSet.getXXX() on empty result set (wasn't caught in some cases). (Bug#848)

  • Don't hide messages from exceptions thrown in I/O layers. (Bug#848)

  • Fixed regression in large split-packet handling. (Bug#848)

  • Better diagnostic error messages in exceptions for “streaming” result sets. (Bug#848)

  • Don't change timestamp TZ twice if useTimezone==true. (Bug#774)

  • Don't wrap SQLExceptions in RowDataDynamic. (Bug#688)

  • Don't try and reset isolation level on reconnect if MySQL doesn't support them. (Bug#688)

  • The insertRow in an UpdatableResultSet is now loaded with the default column values when moveToInsertRow() is called. (Bug#688)

  • DatabaseMetaData.getColumns() wasn't returning NULL for default values that are specified as NULL. (Bug#688)

  • Change default statement type/concurrency to TYPE_FORWARD_ONLY and CONCUR_READ_ONLY (spec compliance). (Bug#688)

  • Fix UpdatableResultSet to return values for getXXX() when on insert row. (Bug#675)

  • Support InnoDB contraint names when extracting foreign key information in DatabaseMetaData (implementing ideas from Parwinder Sekhon). (Bug#664, Bug#517)

  • Backported 4.1 protocol changes from 3.1 branch (server-side SQL states, new field information, larger client capability flags, connect-with-database, and so forth). (Bug#664, Bug#517)

  • refreshRow didn't work when primary key values contained values that needed to be escaped (they ended up being doubly escaped). (Bug#661)

  • Fixed ResultSet.previous() behavior to move current position to before result set when on first row of result set. (Bug#496)

  • Fixed Statement and PreparedStatement issuing bogus queries when setMaxRows() had been used and a LIMIT clause was present in the query. (Bug#496)

  • Faster date handling code in ResultSet and PreparedStatement (no longer uses Date methods that synchronize on static calendars).

  • Fixed test for end of buffer in Buffer.readString().

C.6.4.10. Changes in MySQL Connector/J 3.0.8 (23 May 2003)

Bugs fixed:

  • Fixed SJIS encoding bug, thanks to Naoto Sato. (Bug#378)

  • Fix problem detecting server character set in some cases. (Bug#378)

  • Allow multiple calls to Statement.close(). (Bug#378)

  • Return correct number of generated keys when using REPLACE statements. (Bug#378)

  • Unicode character 0xFFFF in a string would cause the driver to throw an ArrayOutOfBoundsException. . (Bug#378)

  • Fix row data decoding error when using very large packets. (Bug#378)

  • Optimized row data decoding. (Bug#378)

  • Issue exception when operating on an already closed prepared statement. (Bug#378)

  • Optimized usage of EscapeProcessor. (Bug#378)

  • Use JVM charset with filenames and LOAD DATA [LOCAL] INFILE.

  • Fix infinite loop with Connection.cleanup().

  • Changed Ant target compile-core to compile-driver, and made testsuite compilation a separate target.

  • Fixed result set not getting set for Statement.executeUpdate(), which affected getGeneratedKeys() and getUpdateCount() in some cases.

  • Return list of generated keys when using multi-value INSERTS with Statement.getGeneratedKeys().

  • Allow bogus URLs in Driver.getPropertyInfo().

C.6.4.11. Changes in MySQL Connector/J 3.0.7 (08 April 2003)

Bugs fixed:

  • Fixed charset issues with database metadata (charset was not getting set correctly).

  • You can now toggle profiling on/off using Connection.setProfileSql(boolean).

  • 4.1 Column Metadata fixes.

  • Fixed MysqlPooledConnection.close() calling wrong event type.

  • Fixed StringIndexOutOfBoundsException in PreparedStatement.setClob().

  • IOExceptions during a transaction now cause the Connection to be closed.

  • Remove synchronization from Driver.connect() and Driver.acceptsUrl().

  • Fixed missing conversion for YEAR type in ResultSetMetaData.getColumnTypeName().

  • Updatable ResultSets can now be created for aliased tables/columns when connected to MySQL-4.1 or newer.

  • Fixed LOAD DATA LOCAL INFILE bug when file > max_allowed_packet.

  • Don't pick up indexes that start with pri as primary keys for DBMD.getPrimaryKeys().

  • Ensure that packet size from alignPacketSize() does not exceed max_allowed_packet (JVM bug)

  • Don't reset Connection.isReadOnly() when autoReconnecting.

  • Fixed escaping of 0x5c ('\') character for GBK and Big5 charsets.

  • Fixed ResultSet.getTimestamp() when underlying field is of type DATE.

  • Throw SQLExceptions when trying to do operations on a forcefully closed Connection (that is, when a communication link failure occurs).

C.6.4.12. Changes in MySQL Connector/J 3.0.6 (18 February 2003)

Bugs fixed:

  • Backported 4.1 charset field info changes from Connector/J 3.1.

  • Fixed Statement.setMaxRows() to stop sending LIMIT type queries when not needed (performance).

  • Fixed DBMD.getTypeInfo() and DBMD.getColumns() returning different value for precision in TEXT and BLOB types.

  • Fixed SQLExceptions getting swallowed on initial connect.

  • Fixed ResultSetMetaData to return "" when catalog not known. Fixes NullPointerExceptions with Sun's CachedRowSet.

  • Allow ignoring of warning for “non transactional tables” during rollback (compliance/usability) by setting ignoreNonTxTables property to true.

  • Clean up Statement query/method mismatch tests (that is, INSERT not allowed with .executeQuery()).

  • Fixed ResultSetMetaData.isWritable() to return correct value.

  • More checks added in ResultSet traversal method to catch when in closed state.

  • Implemented Blob.setBytes(). You still need to pass the resultant Blob back into an updatable ResultSet or PreparedStatement to persist the changes, because MySQL does not support “locators”.

  • Add “window” of different NULL sorting behavior to DBMD.nullsAreSortedAtStart (4.0.2 to 4.0.10, true; otherwise, no).

C.6.4.13. Changes in MySQL Connector/J 3.0.5 (22 January 2003)

Bugs fixed:

  • Fixed ResultSet.isBeforeFirst() for empty result sets.

  • Added missing LONGTEXT type to DBMD.getColumns().

  • Implemented an empty TypeMap for Connection.getTypeMap() so that some third-party apps work with MySQL (IBM WebSphere 5.0 Connection pool).

  • Added update options for foreign key metadata.

  • Fixed Buffer.fastSkipLenString() causing ArrayIndexOutOfBounds exceptions with some queries when unpacking fields.

  • Quote table names in DatabaseMetaData.getColumns(), getPrimaryKeys(), getIndexInfo(), getBestRowIdentifier().

  • Retrieve TX_ISOLATION from database for Connection.getTransactionIsolation() when the MySQL version supports it, instead of an instance variable.

  • Greatly reduce memory required for setBinaryStream() in PreparedStatements.

C.6.4.14. Changes in MySQL Connector/J 3.0.4 (06 January 2003)

Bugs fixed:

  • Streamlined character conversion and byte[] handling in PreparedStatements for setByte().

  • Fixed PreparedStatement.executeBatch() parameter overwriting.

  • Added quoted identifiers to database names for Connection.setCatalog.

  • Added support for 4.0.8-style large packets.

  • Reduce memory footprint of PreparedStatements by sharing outbound packet with MysqlIO.

  • Added strictUpdates property to allow control of amount of checking for “correctness” of updatable result sets. Set this to false if you want faster updatable result sets and you know that you create them from SELECT statements on tables with primary keys and that you have selected all primary keys in your query.

  • Added support for quoted identifiers in PreparedStatement parser.

C.6.4.15. Changes in MySQL Connector/J 3.0.3 (17 December 2002)

Bugs fixed:

  • Allow user to alter behavior of Statement/ PreparedStatement.executeBatch() via continueBatchOnError property (defaults to true).

  • More robust escape tokenizer: Recognize -- comments, and allow nested escape sequences (see testsuite.EscapeProcessingTest).

  • Fixed Buffer.isLastDataPacket() for 4.1 and newer servers.

  • NamedPipeSocketFactory now works (only intended for Windows), see README for instructions.

  • Changed charsToByte in SingleByteCharConverter to be non-static.

  • Use non-aliased table/column names and database names to fully qualify tables and columns in UpdatableResultSet (requires MySQL-4.1 or newer).

  • LOAD DATA LOCAL INFILE ... now works, if your server is configured to allow it. Can be turned off with the allowLoadLocalInfile property (see the README).

  • Implemented Connection.nativeSQL().

  • Fixed ResultSetMetaData.getColumnTypeName() returning BLOB for TEXT and TEXT for BLOB types.

  • Fixed charset handling in Fields.java.

  • Because of above, implemented ResultSetMetaData.isAutoIncrement() to use Field.isAutoIncrement().

  • Substitute '?' for unknown character conversions in single-byte character sets instead of '\0'.

  • Added CLIENT_LONG_FLAG to be able to get more column flags (isAutoIncrement() being the most important).

  • Honor lower_case_table_names when enabled in the server when doing table name comparisons in DatabaseMetaData methods.

  • DBMD.getImported/ExportedKeys() now handles multiple foreign keys per table.

  • More robust implementation of updatable result sets. Checks that all primary keys of the table have been selected.

  • Some MySQL-4.1 protocol support (extended field info from selects).

  • Check for connection closed in more Connection methods (createStatement, prepareStatement, setTransactionIsolation, setAutoCommit).

  • Fixed ResultSetMetaData.getPrecision() returning incorrect values for some floating-point types.

  • Changed SingleByteCharConverter to use lazy initialization of each converter.

C.6.4.16. Changes in MySQL Connector/J 3.0.2 (08 November 2002)

Bugs fixed:

  • Implemented Clob.setString().

  • Added com.mysql.jdbc.MiniAdmin class, which allows you to send shutdown command to MySQL server. This is intended to be used when “embedding” Java and MySQL server together in an end-user application.

  • Added SSL support. See README for information on how to use it.

  • All DBMD result set columns describing schemas now return NULL to be more compliant with the behavior of other JDBC drivers for other database systems (MySQL does not support schemas).

  • Use SHOW CREATE TABLE when possible for determining foreign key information for DatabaseMetaData. Also allows cascade options for DELETE information to be returned.

  • Implemented Clob.setCharacterStream().

  • Failover and autoReconnect work only when the connection is in an autoCommit(false) state, in order to stay transaction-safe.

  • Fixed DBMD.supportsResultSetConcurrency() so that it returns true for ResultSet.TYPE_SCROLL_INSENSITIVE and ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE.

  • Implemented Clob.setAsciiStream().

  • Removed duplicate code from UpdatableResultSet (it can be inherited from ResultSet, the extra code for each method to handle updatability I thought might someday be necessary has not been needed).

  • Fixed UnsupportedEncodingException thrown when “forcing” a character encoding via properties.

  • Fixed incorrect conversion in ResultSet.getLong().

  • Implemented ResultSet.updateBlob().

  • Removed some not-needed temporary object creation by smarter use of Strings in EscapeProcessor, Connection and DatabaseMetaData classes.

  • Escape 0x5c character in strings for the SJIS charset.

  • PreparedStatement now honors stream lengths in setBinary/Ascii/Character Stream() unless you set the connection property useStreamLengthsInPrepStmts to false.

  • Fixed issue with updatable result sets and PreparedStatements not working.

  • Fixed start position off-by-1 error in Clob.getSubString().

  • Added connectTimeout parameter that allows users of JDK-1.4 and newer to specify a maximum time to wait to establish a connection.

  • Fixed various non-ASCII character encoding issues.

  • Fixed ResultSet.isLast() for empty result sets (should return false).

  • Added driver property useHostsInPrivileges. Defaults to true. Affects whether or not @hostname will be used in DBMD.getColumn/TablePrivileges.

  • Fixed ResultSet.setFetchDirection(FETCH_UNKNOWN).

  • Added queriesBeforeRetryMaster property that specifies how many queries to issue when failed over before attempting to reconnect to the master (defaults to 50).

  • Fixed issue when calling Statement.setFetchSize() when using arbitrary values.

  • Properly restore connection properties when autoReconnecting or failing-over, including autoCommit state, and isolation level.

  • Implemented Clob.truncate().

C.6.4.17. Changes in MySQL Connector/J 3.0.1 (21 September 2002)

Bugs fixed:

  • Charsets now automatically detected. Optimized code for single-byte character set conversion.

  • Fixed ResultSetMetaData.isSigned() for TINYINT and BIGINT.

  • Fixed RowDataStatic.getAt() off-by-one bug.

  • Fixed ResultSet.getRow() off-by-one bug.

  • Massive code clean-up to follow Java coding conventions (the time had come).

  • Implemented ResultSet.getCharacterStream().

  • Added limited Clob functionality (ResultSet.getClob(), PreparedStatemtent.setClob(), PreparedStatement.setObject(Clob).

  • Connection.isClosed() no longer “pings” the server.

  • Connection.close() issues rollback() when getAutoCommit() is false.

  • Added socketTimeout parameter to URL.

  • Added LOCAL TEMPORARY to table types in DatabaseMetaData.getTableTypes().

  • Added paranoid parameter, which sanitizes error messages by removing “sensitive” information from them (such as hostnames, ports, or usernames), as well as clearing “sensitive” data structures when possible.

C.6.4.18. Changes in MySQL Connector/J 3.0.0 (31 July 2002)

Bugs fixed:

  • General source-code cleanup.

  • The driver now only works with JDK-1.2 or newer.

  • Fix and sort primary key names in DBMetaData (SF bugs 582086 and 582086).

  • ResultSet.getTimestamp() now works for DATE types (SF bug 559134).

  • Float types now reported as java.sql.Types.FLOAT (SF bug 579573).

  • Support for streaming (row-by-row) result sets (see README) Thanks to Doron.

  • Testsuite now uses Junit (which you can get from http://www.junit.org.

  • JDBC Compliance: Passes all tests besides stored procedure tests.

  • ResultSet.getDate/Time/Timestamp now recognizes all forms of invalid values that have been set to all zeros by MySQL (SF bug 586058).

  • Added multi-host failover support (see README).

  • Repackaging: New driver name is com.mysql.jdbc.Driver, old name still works, though (the driver is now provided by MySQL-AB).

  • Support for large packets (new addition to MySQL-4.0 protocol), see README for more information.

  • Better checking for closed connections in Statement and PreparedStatement.

  • Performance improvements in string handling and field metadata creation (lazily instantiated) contributed by Alex Twisleton-Wykeham-Fiennes.

  • JDBC-3.0 functionality including Statement/PreparedStatement.getGeneratedKeys() and ResultSet.getURL().

  • Overall speed improvements via controlling transient object creation in MysqlIO class when reading packets.

  • !!! LICENSE CHANGE !!! The driver is now GPL. If you need non-GPL licenses, please contact me <mark@mysql.com>.

  • Performance enchancements: Driver is now 50–100% faster in most situations, and creates fewer temporary objects.

C.6.5. Changes in MySQL Connector/J 2.0.x

C.6.5.1. Changes in MySQL Connector/J 2.0.14 (16 May 2002)

Bugs fixed:

  • ResultSet.getDouble() now uses code built into JDK to be more precise (but slower).

  • Fixed typo for relaxAutoCommit parameter.

  • LogicalHandle.isClosed() calls through to physical connection.

  • Added SQL profiling (to STDERR). Set profileSql=true in your JDBC URL. See README for more information.

  • PreparedStatement now releases resources on .close(). (SF bug 553268)

  • More code cleanup.

  • Quoted identifiers not used if server version does not support them. Also, if server started with --ansi or --sql-mode=ANSI_QUOTES, “"” will be used as an identifier quote character, otherwise “'” will be used.

C.6.5.2. Changes in MySQL Connector/J 2.0.13 (24 April 2002)

Bugs fixed:

  • Fixed unicode chars being read incorrectly. (SF bug 541088)

  • Faster blob escaping for PrepStmt.

  • Added setURL() to MySQLXADataSource. (SF bug 546019)

  • Added set/getPortNumber() to DataSource(s). (SF bug 548167)

  • PreparedStatement.toString() fixed. (SF bug 534026)

  • More code cleanup.

  • Rudimentary version of Statement.getGeneratedKeys() from JDBC-3.0 now implemented (you need to be using JDK-1.4 for this to work, I believe).

  • DBMetaData.getIndexInfo() - bad PAGES fixed. (SF BUG 542201)

  • ResultSetMetaData.getColumnClassName() now implemented.

C.6.5.3. Changes in MySQL Connector/J 2.0.12 (07 April 2002)

Bugs fixed:

  • Fixed testsuite.Traversal afterLast() bug, thanks to Igor Lastric.

  • Added new types to getTypeInfo(), fixed existing types thanks to Al Davis and Kid Kalanon.

  • Fixed time zone off-by-1-hour bug in PreparedStatement (538286, 528785).

  • Added identifier quoting to all DatabaseMetaData methods that need them (should fix 518108).

  • Added support for BIT types (51870) to PreparedStatement.

  • ResultSet.insertRow() should now detect auto_increment fields in most cases and use that value in the new row. This detection will not work in multi-valued keys, however, due to the fact that the MySQL protocol does not return this information.

  • Relaxed synchronization in all classes, should fix 520615 and 520393.

  • DataSources - fixed setUrl bug (511614, 525565), wrong datasource class name (532816, 528767).

  • Added support for YEAR type (533556).

  • Fixes for ResultSet updatability in PreparedStatement.

  • ResultSet: Fixed updatability (values being set to null if not updated).

  • Added getTable/ColumnPrivileges() to DBMD (fixes 484502).

  • Added getIdleFor() method to Connection and MysqlLogicalHandle.

  • ResultSet.refreshRow() implemented.

  • Fixed getRow() bug (527165) in ResultSet.

  • General code cleanup.

C.6.5.4. Changes in MySQL Connector/J 2.0.11 (27 January 2002)

Bugs fixed:

  • Full synchronization of Statement.java.

  • Fixed missing DELETE_RULE value in DBMD.getImported/ExportedKeys() and getCrossReference().

  • More changes to fix Unexpected end of input stream errors when reading BLOB values. This should be the last fix.

C.6.5.5. Changes in MySQL Connector/J 2.0.10 (24 January 2002)

Bugs fixed:

  • Fixed null-pointer-exceptions when using MysqlConnectionPoolDataSource with Websphere 4 (bug 505839).

  • Fixed spurious Unexpected end of input stream errors in MysqlIO (bug 507456).

C.6.5.6. Changes in MySQL Connector/J 2.0.9 (13 January 2002)

Bugs fixed:

  • Fixed extra memory allocation in MysqlIO.readPacket() (bug 488663).

  • Added detection of network connection being closed when reading packets (thanks to Todd Lizambri).

  • Fixed casting bug in PreparedStatement (bug 488663).

  • DataSource implementations moved to org.gjt.mm.mysql.jdbc2.optional package, and (initial) implementations of PooledConnectionDataSource and XADataSource are in place (thanks to Todd Wolff for the implementation and testing of PooledConnectionDataSource with IBM WebSphere 4).

  • Fixed quoting error with escape processor (bug 486265).

  • Removed concatenation support from driver (the || operator), as older versions of VisualAge seem to be the only thing that use it, and it conflicts with the logical || operator. You will need to start mysqld with the --ansi flag to use the || operator as concatenation (bug 491680).

  • Ant build was corrupting included jar files, fixed (bug 487669).

  • Report batch update support through DatabaseMetaData (bug 495101).

  • Implementation of DatabaseMetaData.getExported/ImportedKeys() and getCrossReference().

  • Fixed off-by-one-hour error in PreparedStatement.setTimestamp() (bug 491577).

  • Full synchronization on methods modifying instance and class-shared references, driver should be entirely thread-safe now (please let me know if you have problems).

C.6.5.7. Changes in MySQL Connector/J 2.0.8 (25 November 2001)

Bugs fixed:

  • XADataSource/ConnectionPoolDataSource code (experimental)

  • DatabaseMetaData.getPrimaryKeys() and getBestRowIdentifier() are now more robust in identifying primary keys (matches regardless of case or abbreviation/full spelling of Primary Key in Key_type column).

  • Batch updates now supported (thanks to some inspiration from Daniel Rall).

  • PreparedStatement.setAnyNumericType() now handles positive exponents correctly (adds + so MySQL can understand it).

C.6.5.8. Changes in MySQL Connector/J 2.0.7 (24 October 2001)

Bugs fixed:

  • Character sets read from database if useUnicode=true and characterEncoding is not set. (thanks to Dmitry Vereshchagin)

  • Initial transaction isolation level read from database (if avaialable). (thanks to Dmitry Vereshchagin)

  • Fixed PreparedStatement generating SQL that would end up with syntax errors for some queries.

  • PreparedStatement.setCharacterStream() now implemented

  • Captialize type names when captializeTypeNames=true is passed in URL or properties (for WebObjects. (thanks to Anjo Krank)

  • ResultSet.getBlob() now returns null if column value was null.

  • Fixed ResultSetMetaData.getPrecision() returning one less than actual on newer versions of MySQL.

  • Fixed dangling socket problem when in high availability (autoReconnect=true) mode, and finalizer for Connection will close any dangling sockets on GC.

  • Fixed time zone issue in PreparedStatement.setTimestamp(). (thanks to Erik Olofsson)

  • PreparedStatement.setDouble() now uses full-precision doubles (reverting a fix made earlier to truncate them).

  • Fixed DatabaseMetaData.supportsTransactions(), and supportsTransactionIsolationLevel() and getTypeInfo() SQL_DATETIME_SUB and SQL_DATA_TYPE fields not being readable.

  • Updatable result sets now correctly handle NULL values in fields.

  • PreparedStatement.setBoolean() will use 1/0 for values if your MySQL version is 3.21.23 or higher.

  • Fixed ResultSet.isAfterLast() always returning false.

C.6.5.9. Changes in MySQL Connector/J 2.0.6 (16 June 2001)

Bugs fixed:

  • Fixed PreparedStatement parameter checking.

  • Fixed case-sensitive column names in ResultSet.java.

C.6.5.10. Changes in MySQL Connector/J 2.0.5 (13 June 2001)

Bugs fixed:

  • ResultSet.insertRow() works now, even if not all columns are set (they will be set to NULL).

  • Added Byte to PreparedStatement.setObject().

  • Fixed data parsing of TIMESTAMP values with 2-digit years.

  • Added ISOLATION level support to Connection.setIsolationLevel()

  • DataBaseMetaData.getCrossReference() no longer ArrayIndexOOB.

  • ResultSet.getBoolean() now recognizes -1 as true.

  • ResultSet has +/-Inf/inf support.

  • getObject() on ResultSet correctly does TINYINT->Byte and SMALLINT->Short.

  • Fixed ResultSetMetaData.getColumnTypeName for TEXT/BLOB.

  • Fixed ArrayIndexOutOfBounds when sending large BLOB queries. (Max size packet was not being set)

  • Fixed NPE on PreparedStatement.executeUpdate() when all columns have not been set.

  • Fixed ResultSet.getBlob() ArrayIndex out-of-bounds.

C.6.5.11. Changes in MySQL Connector/J 2.0.3 (03 December 2000)

Bugs fixed:

  • Fixed composite key problem with updatable result sets.

  • Faster ASCII string operations.

  • Fixed off-by-one error in java.sql.Blob implementation code.

  • Fixed incorrect detection of MAX_ALLOWED_PACKET, so sending large blobs should work now.

  • Added detection of -/+INF for doubles.

  • Added ultraDevHack URL parameter, set to true to allow (broken) Macromedia UltraDev to use the driver.

  • Implemented getBigDecimal() without scale component for JDBC2.

C.6.5.12. Changes in MySQL Connector/J 2.0.1 (06 April 2000)

Bugs fixed:

  • Columns that are of type TEXT now return as Strings when you use getObject().

  • Cleaned up exception handling when driver connects.

  • Fixed RSMD.isWritable() returning wrong value. Thanks to Moritz Maass.

  • DatabaseMetaData.getPrimaryKeys() now works correctly with respect to key_seq. Thanks to Brian Slesinsky.

  • Fixed many JDBC-2.0 traversal, positioning bugs, especially with respect to empty result sets. Thanks to Ron Smits, Nick Brook, Cessar Garcia and Carlos Martinez.

  • No escape processing is done on PreparedStatements anymore per JDBC spec.

  • Fixed some issues with updatability support in ResultSet when using multiple primary keys.

C.6.5.13. Changes in MySQL Connector/J 2.0.0pre5 (21 February 2000)

  • Fixed Bad Handshake problem.

C.6.5.14. Changes in MySQL Connector/J 2.0.0pre4 (10 January 2000)

  • Fixes to ResultSet for insertRow() - Thanks to Cesar Garcia

  • Fix to Driver to recognize JDBC-2.0 by loading a JDBC-2.0 class, instead of relying on JDK version numbers. Thanks to John Baker.

  • Fixed ResultSet to return correct row numbers

  • Statement.getUpdateCount() now returns rows matched, instead of rows actually updated, which is more SQL-92 like.

10-29-99

  • Statement/PreparedStatement.getMoreResults() bug fixed. Thanks to Noel J. Bergman.

  • Added Short as a type to PreparedStatement.setObject(). Thanks to Jeff Crowder

  • Driver now automagically configures maximum/preferred packet sizes by querying server.

  • Autoreconnect code uses fast ping command if server supports it.

  • Fixed various bugs with respect to packet sizing when reading from the server and when alloc'ing to write to the server.

C.6.5.15. Changes in MySQL Connector/J 2.0.0pre (17 August 1999)

  • Now compiles under JDK-1.2. The driver supports both JDK-1.1 and JDK-1.2 at the same time through a core set of classes. The driver will load the appropriate interface classes at runtime by figuring out which JVM version you are using.

  • Fixes for result sets with all nulls in the first row. (Pointed out by Tim Endres)

  • Fixes to column numbers in SQLExceptions in ResultSet (Thanks to Blas Rodriguez Somoza)

  • The database no longer needs to specified to connect. (Thanks to Christian Motschke)

C.6.6. Changes in MySQL Connector/J 1.2b (04 July 1999)

  • Better Documentation (in progress), in doc/mm.doc/book1.html

  • DBMD now allows null for a column name pattern (not in spec), which it changes to '%'.

  • DBMD now has correct types/lengths for getXXX().

  • ResultSet.getDate(), getTime(), and getTimestamp() fixes. (contributed by Alan Wilken)

  • EscapeProcessor now handles \{ \} and { or } inside quotes correctly. (thanks to Alik for some ideas on how to fix it)

  • Fixes to properties handling in Connection. (contributed by Juho Tikkala)

  • ResultSet.getObject() now returns null for NULL columns in the table, rather than bombing out. (thanks to Ben Grosman)

  • ResultSet.getObject() now returns Strings for types from MySQL that it doesn't know about. (Suggested by Chris Perdue)

  • Removed DataInput/Output streams, not needed, 1/2 number of method calls per IO operation.

  • Use default character encoding if one is not specified. This is a work-around for broken JVMs, because according to spec, EVERY JVM must support "ISO8859_1", but they don't.

  • Fixed Connection to use the platform character encoding instead of "ISO8859_1" if one isn't explicitly set. This fixes problems people were having loading the character- converter classes that didn't always exist (JVM bug). (thanks to Fritz Elfert for pointing out this problem)

  • Changed MysqlIO to re-use packets where possible to reduce memory usage.

  • Fixed escape-processor bugs pertaining to {} inside quotes.

C.6.7. Changes in MySQL Connector/J 1.2.x and lower

C.6.7.1. Changes in MySQL Connector/J 1.2a (14 April 1999)

  • Fixed character-set support for non-Javasoft JVMs (thanks to many people for pointing it out)

  • Fixed ResultSet.getBoolean() to recognize 'y' & 'n' as well as '1' & '0' as boolean flags. (thanks to Tim Pizey)

  • Fixed ResultSet.getTimestamp() to give better performance. (thanks to Richard Swift)

  • Fixed getByte() for numeric types. (thanks to Ray Bellis)

  • Fixed DatabaseMetaData.getTypeInfo() for DATE type. (thanks to Paul Johnston)

  • Fixed EscapeProcessor for "fn" calls. (thanks to Piyush Shah at locomotive.org)

  • Fixed EscapeProcessor to not do extraneous work if there are no escape codes. (thanks to Ryan Gustafson)

  • Fixed Driver to parse URLs of the form "jdbc:mysql://host:port" (thanks to Richard Lobb)

C.6.7.2. Changes in MySQL Connector/J 1.1i (24 March 1999)

  • Fixed Timestamps for PreparedStatements

  • Fixed null pointer exceptions in RSMD and RS

  • Re-compiled with jikes for valid class files (thanks ms!)

C.6.7.3. Changes in MySQL Connector/J 1.1h (08 March 1999)

  • Fixed escape processor to deal with unmatched { and } (thanks to Craig Coles)

  • Fixed escape processor to create more portable (between DATETIME and TIMESTAMP types) representations so that it will work with BETWEEN clauses. (thanks to Craig Longman)

  • MysqlIO.quit() now closes the socket connection. Before, after many failed connections some OS's would run out of file descriptors. (thanks to Michael Brinkman)

  • Fixed NullPointerException in Driver.getPropertyInfo. (thanks to Dave Potts)

  • Fixes to MysqlDefs to allow all *text fields to be retrieved as Strings. (thanks to Chris at Leverage)

  • Fixed setDouble in PreparedStatement for large numbers to avoid sending scientific notation to the database. (thanks to J.S. Ferguson)

  • Fixed getScale() and getPrecision() in RSMD. (contrib'd by James Klicman)

  • Fixed getObject() when field was DECIMAL or NUMERIC (thanks to Bert Hobbs)

  • DBMD.getTables() bombed when passed a null table-name pattern. Fixed. (thanks to Richard Lobb)

  • Added check for "client not authorized" errors during connect. (thanks to Hannes Wallnoefer)

C.6.7.4. Changes in MySQL Connector/J 1.1g (19 February 1999)

  • Result set rows are now byte arrays. Blobs and Unicode work bidriectonally now. The useUnicode and encoding options are implemented now.

  • Fixes to PreparedStatement to send binary set by setXXXStream to be sent untouched to the MySQL server.

  • Fixes to getDriverPropertyInfo().

C.6.7.5. Changes in MySQL Connector/J 1.1f (31 December 1998)

  • Changed all ResultSet fields to Strings, this should allow Unicode to work, but your JVM must be able to convert between the character sets. This should also make reading data from the server be a bit quicker, because there is now no conversion from StringBuffer to String.

  • Changed PreparedStatement.streamToString() to be more efficient (code from Uwe Schaefer).

  • URL parsing is more robust (throws SQL exceptions on errors rather than NullPointerExceptions)

  • PreparedStatement now can convert Strings to Time/Date values via setObject() (code from Robert Currey).

  • IO no longer hangs in Buffer.readInt(), that bug was introduced in 1.1d when changing to all byte-arrays for result sets. (Pointed out by Samo Login)

C.6.7.6. Changes in MySQL Connector/J 1.1b (03 November 1998)

  • Fixes to DatabaseMetaData to allow both IBM VA and J-Builder to work. Let me know how it goes. (thanks to Jac Kersing)

  • Fix to ResultSet.getBoolean() for NULL strings (thanks to Barry Lagerweij)

  • Beginning of code cleanup, and formatting. Getting ready to branch this off to a parallel JDBC-2.0 source tree.

  • Added "final" modifier to critical sections in MysqlIO and Buffer to allow compiler to inline methods for speed.

9-29-98

  • If object references passed to setXXX() in PreparedStatement are null, setNull() is automatically called for you. (Thanks for the suggestion goes to Erik Ostrom)

  • setObject() in PreparedStatement will now attempt to write a serialized representation of the object to the database for objects of Types.OTHER and objects of unknown type.

  • Util now has a static method readObject() which given a ResultSet and a column index will re-instantiate an object serialized in the above manner.

C.6.7.7. Changes in MySQL Connector/J 1.1 (02 September 1998)

  • Got rid of "ugly hack" in MysqlIO.nextRow(). Rather than catch an exception, Buffer.isLastDataPacket() was fixed.

  • Connection.getCatalog() and Connection.setCatalog() should work now.

  • Statement.setMaxRows() works, as well as setting by property maxRows. Statement.setMaxRows() overrides maxRows set via properties or url parameters.

  • Automatic re-connection is available. Because it has to "ping" the database before each query, it is turned off by default. To use it, pass in "autoReconnect=true" in the connection URL. You may also change the number of reconnect tries, and the initial timeout value via "maxReconnects=n" (default 3) and "initialTimeout=n" (seconds, default 2) parameters. The timeout is an exponential backoff type of timeout; for example, if you have initial timeout of 2 seconds, and maxReconnects of 3, then the driver will timeout 2 seconds, 4 seconds, then 16 seconds between each re-connection attempt.

C.6.7.8. Changes in MySQL Connector/J 1.0 (24 August 1998)

  • Fixed handling of blob data in Buffer.java

  • Fixed bug with authentication packet being sized too small.

  • The JDBC Driver is now under the LPGL

8-14-98

  • Fixed Buffer.readLenString() to correctly read data for BLOBS.

  • Fixed PreparedStatement.stringToStream to correctly read data for BLOBS.

  • Fixed PreparedStatement.setDate() to not add a day. (above fixes thanks to Vincent Partington)

  • Added URL parameter parsing (?user=... and so forth).

C.6.7.9. Changes in MySQL Connector/J 0.9d (04 August 1998)

  • Big news! New package name. Tim Endres from ICE Engineering is starting a new source tree for GNU GPL'd Java software. He's graciously given me the org.gjt.mm package directory to use, so now the driver is in the org.gjt.mm.mysql package scheme. I'm "legal" now. Look for more information on Tim's project soon.

  • Now using dynamically sized packets to reduce memory usage when sending commands to the DB.

  • Small fixes to getTypeInfo() for parameters, and so forth.

  • DatabaseMetaData is now fully implemented. Let me know if these drivers work with the various IDEs out there. I've heard that they're working with JBuilder right now.

  • Added JavaDoc documentation to the package.

  • Package now available in .zip or .tar.gz.

C.6.7.10. Changes in MySQL Connector/J 0.9 (28 July 1998)

  • Implemented getTypeInfo(). Connection.rollback() now throws an SQLException per the JDBC spec.

  • Added PreparedStatement that supports all JDBC API methods for PreparedStatement including InputStreams. Please check this out and let me know if anything is broken.

  • Fixed a bug in ResultSet that would break some queries that only returned 1 row.

  • Fixed bugs in DatabaseMetaData.getTables(), DatabaseMetaData.getColumns() and DatabaseMetaData.getCatalogs().

  • Added functionality to Statement that allows executeUpdate() to store values for IDs that are automatically generated for AUTO_INCREMENT fields. Basically, after an executeUpdate(), look at the SQLWarnings for warnings like "LAST_INSERTED_ID = 'some number', COMMAND = 'your SQL query'". If you are using AUTO_INCREMENT fields in your tables and are executing a lot of executeUpdate()s on one Statement, be sure to clearWarnings() every so often to save memory.

C.6.7.11. Changes in MySQL Connector/J 0.8 (06 July 1998)

  • Split MysqlIO and Buffer to separate classes. Some ClassLoaders gave an IllegalAccess error for some fields in those two classes. Now mm.mysql works in applets and all classloaders. Thanks to Joe Ennis <jce@mail.boone.com> for pointing out the problem and working on a fix with me.

C.6.7.12. Changes in MySQL Connector/J 0.7 (01 July 1998)

  • Fixed DatabaseMetadata problems in getColumns() and bug in switch statement in the Field constructor. Thanks to Costin Manolache <costin@tdiinc.com> for pointing these out.

C.6.7.13. Changes in MySQL Connector/J 0.6 (21 May 1998)

  • Incorporated efficiency changes from Richard Swift <Richard.Swift@kanatek.ca> in MysqlIO.java and ResultSet.java:

  • We're now 15% faster than gwe's driver.

  • Started working on DatabaseMetaData.

  • The following methods are implemented:

    • getTables()

    • getTableTypes()

    • getColumns()

    • getCatalogs()

C.7. MySQL Connector/MXJ Change History

C.7.1. Changes in MySQL Connector/MXJ 5.0.6 (04 May 2007)

Bugs fixed:

  • Changed tests to shutdown mysqld prior to deleting files.

  • Fixed port file to always be writen to datadir.

  • Added os.name-os.arch to resource directory mapping properties file.

  • Swapped out commercial binaries for v5.0.40.

  • Delete portFile on shutdown.

  • Moved platform-map.properties into db-files.jar.

  • Clarified the startup max wait numbers.

  • Updated build.xml in preperation for next beta build.

  • Removed use-default-architecture property replaced.

C.7.2. Changes in MySQL Connector/MXJ 5.0.5 (14 March 2007)

Bugs fixed:

  • Moved MysqldFactory to main package.

  • Reformatting: Added newlines some files which did not end in them.

  • Swapped out commercial binaries for v5.0.36.

  • Found and removed dynamic linking in mysql_kill; updated solution.

  • Changed protected constructor of SimpleMysqldDynamicMBean from taking a MysqldResource to taking a MysqldFactory, in order to lay groundwork for addressing BUG discovered by Andrew Rubinger. See: MySQL Forums (Actual testing with JBoss, and filing a bug, is still required.)

  • build.xml: usage now slightly more verbose; some reformatting.

  • Now incoporates Reggie Bernett's SafeTerminateProcess and only calls the unsafe TerminateProcess as a final last resort.

  • New windows kill.exe fixes bug where mysqld was being force terminated. Issue reported by bruno haleblian and others, see: MySQL Forums.

  • Replaced Boolean.parseBoolean with JDK 1.4 compliant valueOf.

  • Changed connector-mxj.properties default mysql version to 5.0.37.

  • In testing so far mysqld reliably shuts down cleanly much faster.

  • Added testcase to com.mysql.management.jmx.AcceptanceTest which demonstrats that dataDir is a mutable MBean property.

  • Updated build.xml in prep for next release.

  • Changed SimpleMysqldDynamicMBean to create MysqldResource on demand in order to allow setting of datadir. (Rubinger bug groundwork).

  • Clarified the synchronization of MysqldResource methods.

  • SIGHUP is replaced with MySQLShutdown<PID> event.

  • Clarified the immutability of baseDir, dataDir, pidFile, portFile.

  • Added 5.1.15 binaries to the repository.

  • Removed 5.1.14 binaries from the repository.

  • Added getDataDir() to interface MysqldResourceI.

  • Added 5.1.14 binaries to repository.

  • Replaced windows kill.exe resource with re-written version specific to mysqld.

  • Added Patched StandardSocketFactory from Connector/J 5-0 HEAD.

  • Ensured 5.1.14 compatibility.

  • Swapped out gpl binaries for v5.0.37.

  • Removed 5.0.22 binaries from the repository.

C.7.3. Changes in MySQL Connector/MXJ 5.0.4 (28 January 2007)

Bugs fixed:

  • Allow multiple calls to start server from URL connection on non-3306 port. (Bug#24004)

  • Updated build.xml to build to handle with different gpl and commercial mysld version numbers.

  • Only populate the options map from the help text if specifically requested or in the MBean case.

  • Introduced property for Linux & WinXX to default to 32bit versions.

  • Swapped out gpl binaries for v5.0.27.

  • Swapped out commercial binaries for v5.0.32.

  • Moved mysqld binary resourced into separate jar file NOTICE: CLASSPATH will now need to connector-mxj-db-files.jar.

  • Minor test robustness improvements.

  • Moved default version string out of java class into a text editable properties file (connector-mxj.properties) in the resources directory.

  • Fixed test to be tollerant of /tmp being a symlink to /foo/tmp.

C.7.4. Changes in MySQL Connector/MXJ 5.0.3 (24 June 2006)

Bugs fixed:

  • Removed unused imports, formatted code, made minor edits to tests.

  • Removed "TeeOutputStream" - no longer needed.

  • Swapped out the mysqld binaries for MySQL v5.0.22.

C.7.5. Changes in MySQL Connector/MXJ 5.0.2 (15 June 2006)

Bugs fixed:

  • Replaced string parsing with JDBC connection attempt for determining if a mysqld is "ready for connections" CLASSPATH will now need to include Connector/J jar.

  • "platform" directories replace spaces with underscores

  • extracted array and list printing to ListToString utility class

  • Swapped out the mysqld binaries for MySQL v5.0.21

  • Added trace level logging with Aspect/J. CLASSPATH will now need to include lib/aspectjrt.jar

  • reformatted code

  • altered to be "basedir" rather than "port" oriented.

  • help parsing test reflects current help options

  • insulated users from problems with "." in basedir

  • swapped out the mysqld binaries for MySQL v5.0.18

  • Made tests more robust be deleting the /tmp/test-c.mxj directory before running tests.

  • ServerLauncherSocketFactory.shutdown API change: now takes File parameter (basedir) instead of port.

  • socket is now "mysql.sock" in datadir

  • added ability to specify "mysql-version" as an url parameter

  • Extended timeout for help string parsing, to avoid cases where the help text was getting prematurely flushed, and thus truncated.

  • swapped out the mysqld binaries for MySQL v5.0.19

  • MysqldResource now tied to dataDir as well as basedir (API CHANGE)

  • moved PID file into datadir

  • ServerLauncherSocketFactory.shutdown now works across JVMs.

  • extracted splitLines(String) to Str utility class

  • ServerLauncherSocketFactory.shutdown(port) no longer throws, only reports to System.err

  • ServerLauncherSocketFactory now treats URL parameters in the form of &server.foo=null as serverOptionMap.put("foo", null)

  • ServerLauncherSocketFactory.shutdown API change: now takes 2 File parameters (basedir, datadir)

C.7.6. Changes in MySQL Connector/MXJ 5.0.1 (Never released)

This was an internal only release.

C.7.7. Changes in MySQL Connector/MXJ 5.0.0 (09 December 2005)

Bugs fixed:

  • Removed HelpOptionsParser's need to reference a MysqldResource.

  • Reorganized utils into a single "Utils" collaborator.

  • Minor test tweaks

  • Altered examples and tests to use new Connector/J 5.0 URL syntax for for launching Connector/MXJ ("jdbc:mysql:mxj://")

  • Swapped out the mysqld binaries for MySQL v5.0.16.

  • Ditched "ClassUtil" (merged with Str).

  • Minor refactorings for type casting and exception handling.

C.8. MySQL Proxy Change History

C.8.1. Changes in MySQL Proxy 0.6.0 (Not yet released)

Functionality added or changed:

  • When using read/write splitting and the rw-splitting.lua example script, connecting a second user to the proxy returns an error message. (Bug#30867)

  • Added support in read_query_result() to overwrite the result-set.

  • Added --no-daemon and --pid-file.

  • Added hooks for read_auth(), read_handshake() and read_auth_result().

  • Added handling of proxy.connection.backend_ndx in connect_server() and read_query() to support read/write splitting.

  • Added support for proxy.response.packets.

  • Added testcases.

  • Added --no-proxy to disable the proxy.

  • Added support for listening UNIX sockets.

  • Added a global lua-scope proxy.global.*.

  • Added connection pooling.

Bugs fixed:

  • Fixed assertion on COM_BINLOG_DUMP. (Bug#29764)

  • Fixed assertion on result-packets like [ field-len | fields | EOF | ERR ]. (Bug#29732)

  • Fixed assertion at login with empty password + empty default db. (Bug#29719)

  • Fixed assertion at COM_SHUTDOWN. (Bug#29719)

  • Fixed crash if proxy.connection is used in connect_server().

  • Fixed check for glib2 to require at least 2.6.0.

  • Fixed assertion when all backends are down and we try to connect.

  • Fixed connection-stalling if read_query_result() throws an assert()ion.

  • Fixed len-encoding on proxy.resulsets.

  • Fixed compilation on win32.

  • Fixed assertion when connecting to the MySQL 6.0.1.

  • Fixed decoding of len-encoded ints for 3-byte notation.

  • Fixed inj.resultset.affected_rows on SELECT queries.

  • Fixed handling of (SQL) NULL in result-sets.

  • Fixed mem-leak with proxy.response.* is used.

C.8.2. Changes in MySQL Proxy 0.5.1 (30 June 2007)

Functionality added or changed:

  • Added resultset.affected_rows and resultset.insert_id.

  • Changed --proxy.profiling to --proxy-skip-profiling.

  • Added missing dependency to libmysqlclient-dev to the INSTALL file.

  • Added inj.query_time and inj.response_time into the lua scripts.

  • Added support for pre-4.1 passwords in a 4.1 connection.

  • Added script examples for rewriting and injection.

  • Added proxy.VERSION.

  • Added support for UNIX sockets.

  • Added protection against duplicate resultsets from a script.

Bugs fixed:

  • Fixed mysql check in configure to die when mysql.h isn't detected.

  • Fixed handling of duplicate ERR on COM_CHANGE_USER in MySQL 5.1.18+.

  • Fixed compile error with MySQL 4.1.x on missing COM_STMT_*.

  • Fixed crash on fields > 250 bytes when the resultset is inspected.

  • Fixed warning if connect_server() is not provided.

  • Fixed assertion when a error occurs at initial script exec time.

  • Fixed assertion when read_query_result() is not provided when PROXY_SEND_QUERY is used.

C.8.3. Changes in MySQL Proxy 0.5.0 (19 June 2007)

This is the first beta release.

Bugs fixed:

  • Added automake/autoconf support.

  • Added cmake support.