MySQL Cluster: Improved handling of the configuration variables NoOfPagesToDiskDuringRestartACC, NoOfPagesToDiskAfterRestartACC, NoOfPagesToDiskDuringRestartTUP, and NoOfPagesToDiskAfterRestartTUP should result in noticeably faster startup times for MySQL Cluster. (Bug#12149)

Added an optimization that avoids key access with NULL keys for the ref method when used in outer joins. (Bug#12144)

Added support of where clause for queries with FROM DUAL. (Bug#11745)

Maximum size of stored procedures increased from 64k to 4Gb. (Bug#11602)

SHOW CHARACTER SET and INFORMATION_SCHEMA now properly report the Latin1 character set as cp1252. (Bug#11216)

Added new ER_STACK_OVERRUN_NEED_MORE error message to indicate that, while the stack is not completely full, more stack space is required. (Bug#11213)

mysqldump now dumps triggers for each dumped table. This can be suppressed with the --skip-triggers option. (Bug#10431)

Added error message for users who attempt CREATE TABLE ... LIKE and specify a non-table in the LIKE clause. (Bug#6859)

Security improvement: Applied a patch that addresses a potential zlib data vulnerability that could result in an application crash. This only affects the binaries for platforms that are linked statically against the bundled zlib (most notably Microsoft Windows and HP-UX). (CVE-2005-1849)

MySQL Cluster: The MySQL Cluster backup log was invalid where the number of Cluster nodes was not equal to a power of 2. (Bug#11675)

Creation of the mysql group account failed during the RPM installation. (Bug#12348)

Updated dependency list for RPM builds to include missing dependencies such as useradd and groupadd. (Bug#12233)

A delayed insert that would duplicate an existing record crashed the server instead. (Bug#12226)

When DROP DATABASE was called concurrently with a DROP TABLE of any table, the MySQL Server crashed. (Bug#12212)

InnoDB: True VARCHAR: Return NULL columns in the format expected by MySQL. (Bug#12186)

Information about a trigger was not displayed in the output of SELECT ... FROM INFORMATION_SCHEMA.TRIGGERS when the selected database was INFORMATION_SCHEMA, prior to the trigger's first invocation. (Bug#12127)

InnoDB: Do not flush after each write, not even before setting up the doublewrite buffer. Flushing can be extremely slow on some systems. (Bug#12125)

Two threads could potentially initialize different characters sets and overwrite each other. (Bug#12109)

big5 strings were not being stored in FULLTEXT index. (Bug#12075)

Character data truncated when GBK characters 0xA3A0 and 0xA1 are present. (Bug#11987)

ALTER TABLE when SQL_MODE = 'TRADITIONAL' gave rise to an invalid error message. (Bug#11964)

Issuing successive FLUSH TABLES WITH READ LOCK would cause the mysql client to hang. (Bug#11934)

mysql_install_db used static localhost value in GRANT tables even when server hostname is not localhost, such as localhost.localdomain. This change is applied to version 5.0.10b on Windows. (Bug#11822)

Comparisons like SELECT "A\\" LIKE "A\\"; fail when using SET NAMES utf8;. (Bug#11754)

Attempting to repair a table having a fulltext index on a column containing words whose length exceeded 21 characters and where myisam_repair_threads was greater than 1 would crash the server. (Bug#11684)

When used in a SELECT query against a view, the GROUP_CONCAT() function returned only a single row. (Bug#11412)

Multiplying ABS() output by a negative number would return incorrect results. (Bug#11402)

The LPAD() and RPAD() functions returned the wrong length to mysql_fetch_fields(). (Bug#11311)

A UNIQUE VARCHAR column would be mis-identified as MUL in table descriptions. (Bug#11227)

DDL statements now are allowed in stored procedures if the procedure is not invoked from a stored function or a trigger. Also fixed problems where a TEMPORARY statement created by one stored routine was inaccessible to another routine invoked during the same connection. (Bug#11126)

Calling the C API function mysql_stmt_fetch() after all rows of a result set were exhausted would return an error instead of MYSQL_NO_DATA. (Bug#11037)

SELECT @@local... returned @@session... in the column header. (Bug#10724)

Incorrect error message displayed if user attempted to create a table in a non-existing database using CREATE database_name.table_name syntax. (Bug#10407)

Unsigned LONG system variables may return incorrect value when retrieved with a SELECT for certain values. (Bug#10351)

GROUP_CONCAT() sometimes returned a result with a different collation from that of its arguments. (Bug#10201)

Prepared statements were not being written to the Slow Query log. (Bug#9968)

The value of max_connections_per_hour was capped by the unrelated max_user_connections setting. (Bug#9947)

In stored procedures, a cursor that fetched an empty string into a variable would set the variable to NULL instead. (Bug#8692)

Added checks to prevent error when allocating memory when there was insufficient memory available. (Bug#7003)

Multiple SELECT SQL_CACHE queries in a stored procedure causes error and client hang. (Bug#6897)

A trigger dependent on a feature of one SQL_MODE setting would cause an error when invoked after the SQL_MODE was changed. (Bug#5891)