The default value of the connect_timeout system variable was increased from 5 to 10 seconds. This might help in cases where clients frequently encounter errors of the form Lost connection to MySQL server at 'XXX', system error: errno. (Bug#28359)

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)

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)

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)

An assertion designed detect a bug in the ROLLUP implementation incorrectly failed when used in subquery context with non-cacheable statements. (Bug#31556)

The fix for Bug#24989 introduced a problem such that a NULL thread handler could be used during a rollback operation. This problem is unlikely to be seen in practice. (Bug#31517)

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

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

Executing RENAME while tables were open for use with HANDLER statements could cause a server crash. (Bug#31409)

mysql-test-run.pl tried to create files in a directory where it could not be expected to have write permission. mysqltest created .reject files in a directory other than the one where test results go. (Bug#31398)

CONVERT(val, DATETIME) would fail on invalid input, but processing was not aborted for the WHERE clause, leading to a server crash. (Bug#31253)

Allocation of an insufficiently large group-by buffer following creation of a temporary table could lead to a server crash. (Bug#31249)

Use of DECIMAL(n, n) ZEROFILL in GROUP_CONCAT() could cause a server crash. (Bug#31227)

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)

WIth small values of myisam_sort_buffer_size, REPAIR TABLE for MyISAM tables could cause a server crash. (Bug#31174)

Use of the @@hostname system variable in inserts in mysql_system_tables_data.sql did not replicate. The workaround is to select its value into a user variable (which does replicate) and insert that. (Bug#31167)

Selecting spatial types in a UNION could cause a server crash. (Bug#31155)

Use of GROUP_CONCAT(DISTINCT bit_column) caused an assertion failure. (Bug#31154)

Internal conversion routines could fail for several multi-byte character sets (big5, cp932, euckr, gb2312, sjis) for empty strings or during evaluation of SOUNDS LIKE. (Bug#31069, Bug#31070)

A server crash could occur when a non-DETERMINISTIC stored function was used in a GROUP BY clause. (Bug#31035)

On Windows, the pthread_mutex_trylock() implementation was incorrect. (Bug#30992)

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)

MAKEDATE() incorrectly moved year values in the 100-200 range into the 1970-2069 range. (This is legitimate for 00-99, but three-digit years should be used unchanged.) (Bug#30951)

For MEMORY tables, lookups for NULL values in BTREE indexes could return incorrect results. (Bug#30885)

Values for the --tc-heuristic-recover option incorrectly were treated as values for the --myisam-stats-method option. (Bug#30821)

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

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

For MEMORY tables, DELETE statements that remove rows based on an index read could fail to remove all matching rows. (Bug#30590)

Versions of mysqldump from MySQL 4.1 or higher tried to use START TRANSACTION WITH CONSISTENT SNAPSHOT if the --single-transaction and --master-data options were given, even with servers older than 4.1 that do not support consistent snapshots. (Bug#30444)

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

Specifying the --without-geometry option for configure caused server compilation to fail. (Bug#29972)

Under some circumstances, a UDF initialization function could be passed incorrect argument lengths. (Bug#29804)

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

On Windows, mysql_upgrade created temporary files in C:\ and did not clean them up. (Bug#28774)

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)

The parser confused user-defined function (UDF) and stored function creation for CREATE FUNCTION and required that there be a default database when creating UDFs, although there is no such requirement. (Bug#28318, Bug#29816)

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

comp_err created files with permissions such that they might be inaccessible during make install operations. (Bug#27789)

The anonymous accounts were not being created during MySQL installation. (Bug#27692)

Several functions and operators returned an incorrect result type (string) when given DATE parameters: COALESCE(), IF(), IFNULL(), LEAST(), GREATEST(), CASE. These now aggregate DATE (or DATETIME) parameters to produce a DATE (or DATETIME result. In addition, the result type of the STR_TO_DATE() function is now DATETIME by default. (Bug#27216)

Executing FLUSH TABLES while tables were open for use with HANDLER statements could cause a server crash. (Bug#21587)

Hostnames sometimes were treated as case sensitive in account-management statements (CREATE USER, GRANT, REVOKE, and so forth). (Bug#19828)

The Aborted_clients status variable was incremented twice if a client exited without calling mysql_close(). (Bug#16918)

Clients were ignoring the TCP/IP port number specified as the default port via the --with-tcp-port configuration option. (Bug#15327)

Values of types REAL ZEROFILL, DOUBLE ZEROFILL, FLOAT ZEROFILL, were not zero-filled when converted to a character representation in the C prepared statement API. (Bug#11589)

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:

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)

MySQL Cluster: Mapping of NDB error codes to storage engine error codes has been improved. (Bug#28423)

MySQL Cluster: The output from the cluster management client showing the progress of data node starts has been improved. (Bug#23354)

Server parser performance was improved for expression parsing by lowering the number of state state transitions and reductions needed. (Bug#30625)

Server parser performance was improved for boolean expressions. (Bug#30237)

Incompatible Change: The parser accepted statements that contained /* ... */ that were not properly closed with */, such as SELECT 1 /* + 2. Statements that contain unclosed /*-comments now are rejected with a syntax error.

This fix has the potential to cause incompatibilities. Because of Bug#26302, which caused the trailing */ to be truncated from comments in views, stored routines, triggers, and events, it is possible that objects of those types may have been stored with definitions that now will be rejected as syntactically invalid. Such objects should be dropped and re-created so that their definitions do not contain truncated comments. If a stored object definition contains only a single statement (does not use a BEGIN ... END block) and contains a comment within the statement, the comment should be moved to follow the statement or the object should be rewritten to use a BEGIN ... END block. For example, this statement:

CREATE PROCEDURE p() SELECT 1 /* my comment */ ;

Can be rewritten in either of these ways:

CREATE PROCEDURE p() SELECT 1; /* my comment */
CREATE PROCEDURE p() BEGIN SELECT 1 /* my comment */ ; END;

(Bug#28779)

MySQL Cluster: Attempting to restore a backup made on a cluster host using one endian to a machine using the other endian could cause the cluster to fail. (Bug#29674)

MySQL Cluster: A query using joins between several large tables and requiring unique index lookups failed to complete, eventually returning Uknown Error after a very long period of time. This occurred due to inadequate handling of instances where the Transaction Coordinator ran out of TransactionBufferMemory, when the cluster should have returned NDB error code 4012 (Request ndbd time-out). (Bug#28804)

MySQL Cluster: The description of the --print option in the output from ndb_restore --help was incorrect. (Bug#27683)

MySQL Cluster: An invalid subselect on an NDB table could cause mysqld to crash. (Bug#27494)

For an InnoDB table if a SELECT was ordered by the primary key and also had a WHERE field = value clause on a different field that was indexed, a DESC order instruction would be ignored. (Bug#31001)

A failed HANDLER ... READ operation could leave the table in a locked state. (Bug#30632)

The optimization that uses a unique index to remove GROUP BY did not ensure that the index was actually used, thus violating the ORDER BY that is implied by GROUP BY. (Bug#30596)

SHOW STATUS LIKE 'Ssl_cipher_list' from a MySQL client connected via SSL returned an empty string rather than a list of available ciphers. (Bug#30593)

Issuing a DELETE statement having both an ORDER BY clause and a LIMIT clause could cause mysqld to crash. (Bug#30385)

The Last_query_cost status variable value can be computed accurately only for simple “flat” queries, not complex queries such as those with subqueries or UNION. However, the value was not consistently being set to 0 for complex queries. (Bug#30377)

Queries that had a GROUP BY clause and selected COUNT(DISTINCT bit_column) returned incorrect results. (Bug#30324)

Using DISTINCT or GROUP BY on a BIT column in a SELECT statement caused the column to be cast internally as an integer, with incorrect results being returned from the query. (Bug#30245)

Multiple-table DELETE statements could delete rows from the wrong table. (Bug#30234)

Short-format mysql commands embedded within /*! ... */ comments were parsed incorrectly by mysql, which discarded the rest of the comment including the terminating */ characters. The result was a malformed (unclosed) comment. Now mysql does not discard the */ characters. (Bug#30164)

When mysqldump wrote DROP DATABASE statements within version-specific comments, it included the terminating semicolon in the wrong place, causing following statements to fail when the dump file was reloaded. (Bug#30126)

If a view used a function in its SELECT statement, the columns from the view were not inserted into the INFORMATION_SCHEMA.COLUMNS table. (Bug#29408)

Reads on BLOB columns were not locked when they needed to be, in order to guarantee consistency. (Bug#29102)

Killing an SSL connection on platforms where MySQL is compiled with -DSIGNAL_WITH_VIO_CLOSE (Windows, Mac OS X, and some others) could crash the server. (Bug#28812)

A SELECT in one connection could be blocked by INSERT ... ON DUPLICATE KEY UPDATE in another connection even when low_priority_updates is set. (Bug#28587)

mysql_upgrade could run binaries dynamically linked against incorrect versions of shared libraries. (Bug#28560)

SHOW COLUMNS returned NULL instead of the empty string for the Default value of columns that had no default specified. (Bug#27747)

With recent versions of DBD::mysql, mysqlhotcopy generated table names that were doubly qualified with the database name. (Bug#27694)

An attempt to perform a SELECT ... FROM INFORMATION_SCHEMA.TABLES whose result included information about NDB tables for which the user had no privileges could crash the MySQL Server on which the query was performed. (Bug#26793)

For InnoDB tables, CREATE TABLE a AS SELECT * FROM A would fail. (Bug#25164)

Under heavy load with a large query cache, invalidating part of the cache could cause the server to freeze (that is, to be unable to service other operations until the invalidation was complete). (Bug#21074)

Worked around an icc problem with an incorrect machine instruction being generated in the context of software pre-fetching after a subroutine got in-lined. (Upgrading to icc 10.0.026 makes the workaround unnecessary.) (Bug#20803)

Parameters of type DATETIME or DATE in stored procedures were silently converted to VARBINARY. (Bug#13675)

If a MyISAM table is created with no DATA DIRECTORY option, the .MYD file is created in the database directory. By default, if MyISAM finds an existing .MYD file in this case, it overwrites it. The same applies to .MYI files for tables created with no INDEX DIRECTORY option. To suppress this behavior, start the server with the new --keep_files_on_create option, in which case MyISAM will not overwrite existing files and returns an error instead. (Bug#29325)

The EXAMPLE storage engine is now enabled by default.

MySQL Cluster: The output from ndb_config --config-file=file was sent to stdout rather than stderr. (Bug#25941)

MySQL Cluster: Large file support did not work in AIX server binaries. (Bug#10776)

Memory corruption occurred for some queries with a top-level OR operation in the WHERE condition if they contained equality predicates and other sargable predicates in disjunctive parts of the condition. (Bug#30396)

The server created temporary tables for filesort operations in the working directory, not in the directory specified by the tmpdir system variable. (Bug#30287)

The query cache does not support retrieval of statements for which column level access control applies, but the server was still caching such statements, thus wasting memory. (Bug#30269)

GROUP BY on BIT columns produced incorrect results. (Bug#30219)

Using KILL QUERY or KILL CONNECTION to kill a SELECT statement caused a server crash if the query cache was enabled. (Bug#30201)

Prepared statements containing CONNECTION_ID() could be written improperly to the binary log. (Bug#30200)

When a thread executing a DROP TABLE statement was killed, the table name locks that had been acquired were not released. (Bug#30193)

Use of local variables with non-ASCII names in stored procedures crashed the server. (Bug#30120)

On Windows, client libraries lacked symbols required for linking. (Bug#30118)

For MyISAM tables on Windows, INSERT, DELETE, or UPDATE followed by ALTER TABLE within LOCK TABLES could cause table corruption. (Bug#29957)

With auto-reconnect enabled, row fetching for a prepared statement could crash after reconnect occurred because loss of the the statement handler was not accounted for. (Bug#29948)

LOCK TABLES did not pre-lock tables used in triggers of the locked tables. Unexpected locking behavior and statement failures similar to failed: 1100: Table 'xx' was not locked with LOCK TABLES could result. (Bug#29929)

INSERT ... VALUES(CONNECTION_ID(), ...) statements were written to the binary log in such a way that they could not be properly restored. (Bug#29928)

Adding DISTINCT could cause incorrect rows to appear in a query result. (Bug#29911)

Using the DATE() function in a WHERE clause did not return any records after encountering NULL. However, using TRIM or CAST produced the correct results. (Bug#29898)

Very long prepared statements in stored procedures could cause a server crash. (Bug#29856)

--myisam-recover="" (empty option value) did not disable MyISAM recovery. (Bug#29856)

If query execution involved a temporary table, GROUP_CONCAT() could return a result with an incorrect character set. (Bug#29850)

If one thread was performing concurrent inserts, other threads reading from the same table using equality key searches could see the index values for new rows before the data values had been written, leading to reports of table corruption. (Bug#29838)

Repeatedly accessing a view in a stored procedure (for example, in a loop) caused a small amount of memory to be allocated per access. Although this memory is deallocated on disconnect, it could be a problem for a long running stored procedures that make repeated access of views. (Bug#29834)

Non-range queries of the form SELECT ... FROM ... WHERE keypart_1=const, ..., keypart_n=const ORDER BY ... FOR UPDATE sometimes were unneccesarily blocked waiting for a lock if another transaction was using SELECT ... FOR UPDATE on the same table. (Bug#29804)

mysqldump produced output that incorrectly discarded the NO_AUTO_VALUE_ON_ZERO value of the SQL_MODE variable after dumping triggers. (Bug#29788)

An assertion failure occurred within yaSSL for very long keys. (Bug#29784)

For MEMORY tables, the index_merge union access method could return incorrect results. (Bug#29740)

Comparison of TIME values using the BETWEEN operator led to string comparison, producing incorrect results in some cases. Now the values are compared as integers. (Bug#29739)

The thread ID was not reset properly after execution of mysql_change_user(), which could cause replication failure when replicating temporary tables. (Bug#29734)

For a table with a DATE column date_col such that selecting rows with WHERE date_col = 'date_val 00:00:00' yielded a non-empty result, adding GROUP BY date_col caused the result to be empty. (Bug#29729)

In some cases, INSERT INTO ... SELECT ... GROUP BY could insert rows even if the SELECT by itself produced an empty result. (Bug#29717)

For the embedded server, the mysql_stmt_store_result() C API function caused a memory leak for empty result sets. (Bug#29687)

EXPLAIN produced Impossible where for statements of the form SELECT ... FROM t WHERE c=0, where c was an ENUM column defined as a primary key. (Bug#29661)

On Windows, ALTER TABLE hung if records were locked in share mode by a long-running transaction. (Bug#29644)

A left join between two views could produce incorrect results. (Bug#29604)

Certain statements with unions, subqueries, and joins could result in huge memory consumption. (Bug#29582)

Clients using SSL could hang the server. (Bug#29579)

A slave running with --log-slave-updates would fail to write INSERT DELAY IGNORE statements to its binary log, resulting in different binary log contents on the master and slave. (Bug#29571)

An incorrect result was returned when comparing string values that were converted to TIME values with CAST(). (Bug#29555)

Operations that used the time zone replicated the time zone only for successful operations, but did not replicate the time zone for errors that need to know it. (Bug#29536)

Conversion of ASCII DEL (0x7F) to Unicode incorrectly resulted in QUESTION MARK (0x3F) rather than DEL. (Bug#29499)

A field packet with NULL fields caused a libmysqlclient crash. (Bug#29494)

When using a combination of HANDLER... READ and DELETE on a table, MySQL continued to open new copies of the table every time, leading to an exhaustion of file descriptors. (Bug#29474)

This regression was introduced by Bug#21587

On Windows, the mysql client died if the user entered a statement and Return after entering Control-C. (Bug#29469)

Failure to consider collation when comparing space characters could lead to incorrect index entry order, making it impossible to find some index values. (Bug#29461)

Killing an INSERT DELAYED thread caused a server crash. (Bug#29431)

The special “zero” ENUM value was coerced to the normal empty string ENUM value during a column-to-column copy. This affected CREATE ... SELECT statements and SELECT statements with aggregate functions on ENUM columns in the GROUP BY clause. (Bug#29360)

Optimization of queries with DETERMINISTIC stored functions in the WHERE clause was ineffective: A sequential scan was always used. (Bug#29338)

MyISAM corruption could occur with the cp932_japanese_ci collation for the cp932 character set due to incorrect comparison for trailing space. (Bug#29333)

The mysql_list_fields() C API function incorrectly set MYSQL_FIELD::decimals for some view columns. (Bug#29306)

InnoDB refused to start on some versions of FreeBSD with LinuxThreads. This is fixed by enabling file locking on FreeBSD. (Bug#29155)

INSERT DELAYED statements on a master server are replicated as non-DELAYED inserts on slaves (which is normal, to preserve serialization), but the inserts on the slave did not use concurrent inserts. Now INSERT DELAYED on a slave is converted to a concurrent insert when possible, and to a normal insert otherwise. (Bug#29152)

A maximum of 4TB InnoDB free space was reported by SHOW TABLE STATUS, which is incorrect on systems with more than 4TB space. (Bug#29097)

A byte-order issue in writing a spatial index to disk caused bad index files on some systems. (Bug#29070)

Creation of a legal stored procedure could fail if no default database had been selected. (Bug#29050)

Coercion of ASCII values to character sets that are a superset of ASCII sometimes was not done, resulting in illegal mix of collations errors. These cases now are resolved using repertoire, a new string expression attribute (see Section 9.6, “String Repertoire”). (Bug#28875)

Fast ALTER TABLE (that works without rebuilding the table) acquired duplicate locks in the storage engine. In MyISAM, if ALTER TABLE was issued under LOCK TABLE, it caused all data inserted after LOCK TABLE to disappear. (Bug#28838)

Tables using the InnoDB storage engine incremented AUTO_INCREMENT values incorrectly with ON DUPLICATE KEY UPDATE. (Bug#28781)

For InnoDB tables, MySQL unnecessarily sorted records in certain cases when the records were retrieved by InnoDB in the proper order already. (Bug#28591)

mysql_install_db could fail to find script files that it needs. (Bug#28585)

Statements within stored procedures ignored the value of the low_priority_updates system variable. (Bug#28570)

If a stored procedure was created and invoked prior to selecting a default database with USE, a No database selected error occurred. (Bug#28551)

On Mac OS X, shared-library installation pathnames were incorrect. (Bug#28544)

Using the --skip-add-drop-table option with mysqldump generated incorrect SQL if the database included any views. The recreation of views requires the creation and removal of temporary tables. This option suppressed the removal of those temporary tables. The same applied to --compact since this option also invokes --skip-add-drop-table. (Bug#28524)

The IS_UPDATABLE column in the INFORMATION_SCHEMA.VIEWS table was not always set correctly. (Bug#28266)

A race condition in the interaction between MyISAM and the query cache code caused the query cache not to invalidate itself for concurrently inserted data. (Bug#28249)

Indexing column prefixes in InnoDB tables could cause table corruption. (Bug#28138)

Index creation could fail due to truncation of key values to the maximum key length rather than to a mulitiple of the maximum character length. (Bug#28125)

Some SHOW statements and INFORMATION_SCHEMA queries could expose information not allowed by the user's access privileges. (Bug#27629)

Some character mappings in the ascii.xml file were incorrect. (Bug#27562)

An error that happened inside INSERT, UPDATE, or DELETE statements performed from within a stored function or trigger could cause inconsistency between master and slave servers. (Bug#27417)

A SELECT with more than 31 nested dependent subqueries returned an incorrect result. (Bug#27352)

INSERT INTO ... SELECT caused a crash if innodb_locks_unsafe_for_binlog was enabled. (Bug#27294)

FEDERATED tables had an artificially low maximum of key length. (Bug#26909)

After the first read of a TEMPORARY table, CHECK TABLE could report the table as being corrupt. (Bug#26325)

If an operation had an InnoDB table, and two triggers, AFTER UPDATE and AFTER INSERT, competing for different resources (such as two distinct MyISAM tables), the triggers were unable to execute concurrently. In addition, INSERT and UPDATE statements for the InnoDB table were unable to run concurrently. (Bug#26141)

ALTER DATABASE did not require at least one option. (Bug#25859)

Using HANDLER to open a table having a storage engine not supported by HANDLER properly returned an error, but also improperly prevented the table from being dropped by other connections. (Bug#25856)

When using a FEDERATED table, the value of last_insert_id() would not correctly update the C API interface, which would affect the autogenerated ID returned both through the C API and the MySQL protocol, affecting Connectors that used the protocol and/or C API. (Bug#25714)

The server was blocked from opening other tables while the FEDERATED engine was attempting to open a remote table. Now the server does not check the correctness of a FEDERATED table at CREATE TABLE time, but waits until the table actually is accessed. (Bug#25679)

Several InnoDB assertion failures were corrected. (Bug#25645)

In a stored function or trigger, when InnoDB detected deadlock, it attempted rollback and displayed an incorrect error message (Explicit or implicit commit is not allowed in stored function or trigger). Now InnoDB returns an error under these conditions and does not attempt rollback. Rollback is handled outside of InnoDB above the function/trigger level. (Bug#24989)

Dropping a temporary InnoDB table that had been locked with LOCK TABLES caused a server crash. (Bug#24918)

On Windows, executables did not include Vista manifests. (Bug#24732)

Slave servers could incorrectly interpret an out-of-memory error from the master and reconnect using the wrong binary log position. (Bug#24192)

If MySQL/InnoDB crashed very quickly after starting up, it would not force a checkpoint. In this case, InnoDB would skip crash recovery at next startup, and the database would become corrupt. Fix: If the redo log scan at InnoDB startup goes past the last checkpoint, force crash recovery. (Bug#23710)

SHOW INNODB STATUS caused an assertion failure under high load. (Bug#22819)

A statement of the form CREATE TABLE IF NOT EXISTS t1 SELECT f1() AS i failed with a deadlock error if the stored function f1() referred to a table with the same name as the to-be-created table. Now it correctly produces a message that the table already exists. (Bug#22427)

Read lock requests that were blocked by a pending write lock request were not allowed to proceed if the statement requesting the write lock was killed. (Bug#21281)

mysql-stress-test.pl and mysqld_multi.server.sh were missing from some binary distributions. (Bug#21023, Bug#25486)

On Windows, the server used 10MB of memory for each connection thread, resulting in memory exhaustion. Now each thread uses 1MB. (Bug#20815)

InnoDB produced an unnecessary (and harmless) warning: InnoDB: Error: trying to declare trx to enter InnoDB, but InnoDB: it already is declared. (Bug#20090)

SQL_BIG_RESULT had no effect for CREATE TABLE ... SELECT SQL_BIG_RESULT ... statements. (Bug#15130)

mysql_setpermission tried to grant global-only privileges at the database level. (Bug#14618)

For the general query log, logging of prepared statements executed via the C API differed from logging of prepared statements performed with PREPARE and EXECUTE. Logging for the latter was missing the Prepare and Execute lines. (Bug#13326)

Backup software can cause ERROR_SHARING_VIOLATION or ERROR_LOCK_VIOLATION conditions during file operations. InnoDB now retries forever until the condition goes away. (Bug#9709)

If a MERGE table cannot be opened or used because of a problem with an underlying table, CHECK TABLE now displays information about which table caused the problem. (Bug#26976)

The SQL_MODE, FOREIGN_KEY_CHECKS, UNIQUE_CHECKS, character set/collations, and SQL_AUTO_IS_NULL sesstion variables are written to the binary log and honoured during replication. See Section 5.11.3, “The Binary Log”.

MySQL Cluster: When restarting a data node, queries could hang during that node's start phase 5, and only continue once the node entered phase 6. (Bug#29364)

MySQL Cluster: The management client's response to START BACKUP WAIT COMPLETED did not include the backup ID. (Bug#27640)

On the IBM i5 platform, the installation script in *SAVF binaries unconditionally executed the mysql_install_db script. (Bug#30084)

gcov coverage-testing information was not written if the server crashed. (Bug#29543)

Corrupt data resulted from use of SELECT ... INTO OUTFILE 'file_name' FIELDS ENCLOSED BY 'c', where c is a digit or minus sign, followed by LOAD DATA INFILE 'file_name' FIELDS ENCLOSED BY 'c'. (Bug#29442)

Use of SHOW BINLOG EVENTS for a non-existent log file followed by PURGE MASTER LOGS caused a server crash. (Bug#29420)

Assertion failure could occur for grouping queries that employed DECIMAL user variables with assignments to them. (Bug#29417)

For CAST(expr AS DECIMAL(M,D)), the limits of 65 and 30 on the precision (M) and scale (D) were not enforced. (Bug#29415)

Results for a select query that aliases the column names against a view could duplicate one column while omitting another. This bug could occur for a query over a multiple-table view that includes an ORDER BY clause in its definition. (Bug#29392)

mysqldump created a stray file when a given a too-long filename argument. (Bug#29361)

FULLTEXT indexes could be corrupted by certain gbk characters. (Bug#29299)

SELECT ... INTO OUTFILE followed by LOAD DATA could result in garbled characters when the FIELDS ENCLOSED BY clause named a delimiter of '0', 'b', 'n', 'r', 't', 'N', or 'Z' due to an interaction of character encoding and doubling for data values containing the enclosed-by character. (Bug#29294)

Sort order of the collation wasn't used when comparing trailing spaces. This could lead to incorrect comparison results, incorrectly created indexes, or incorrect result set order for queries that include an ORDER BY clause. (Bug#29261)

If an ENUM column contained '' as one of its members (represented with numeric value greater than 0), and the column contained error values (represented as 0 and displayed as ''), using ALTER TABLE to modify the column definition caused the 0 values to be given the numeric value of the non-zero '' member. (Bug#29251)

Calling mysql_options() after mysql_real_connect() could cause clients to crash. (Bug#29247)

CHECK TABLE for ARCHIVE tables could falsely report table corruption or cause a server crash. (Bug#29207)

Mixing binary and utf8 columns in a union caused field lengths to be calculated incorrectly, resulting in truncation. (Bug#29205)

AsText() could fail with a buffer overrun. (Bug#29166)

LOCK TABLES was not atomic when more than one InnoDB tables were locked. (Bug#29154)

A network structure was initialized incorrectly, leading to embedded server crashes. (Bug#29117)

An assertion failure occurred if a query contained a conjunctive predicate of the form view_column = constant in the WHERE clause and the GROUP BY clause contained a reference to a different view column. The fix also enables application of an optimization that was being skipped if a query contained a conjunctive predicate of the form view_column = constant in the WHERE clause and the GROUP BY clause contained a reference to the same view column. (Bug#29104)

If an INSERT INTO ... SELECT statement inserted into the same table that the SELECT retrieved from, and the SELECT included ORDER BY and LIMIT clauses, different data was inserted than the data produced by the SELECT executed by itself. (Bug#29095)

Queries that performed a lookup into a BINARY index containing key values ending with spaces caused an assertion failure for debug builds and incorrect results for non-debug builds. (Bug#29087)

The semantics of BIGINT depended on platform-specific characteristics. (Bug#29079)

If one of the queries in a UNION used the SQL_CACHE option and another query in the UNION contained a nondeterministic function, the result was still cached. For example, this query was incorrectly cached:

          
SELECT NOW() FROM t1 UNION SELECT SQL_CACHE 1 FROM t1;

(Bug#29053)

DROP USER statements that named multiple users, only some of which could be dropped, were replicated incorrectly. (Bug#29030)

REPLACE, INSERT IGNORE, and UPDATE IGNORE did not work for FEDERATED tables. (Bug#29019)

Inserting into InnoDB tables and executing RESET MASTER in multiple threads cause assertion failure in debug server binaries. (Bug#28983)

For a ucs2 column, GROUP_CONCAT() did not convert separators to the result character set before inserting them, producing a result containing a mixture of two different character sets. (Bug#28925)

Queries using UDFs or stored functions were cached. (Bug#28921)

For a join with GROUP BY and/or ORDER BY and a view reference in the FROM list, the query metadata erroneously showed empty table aliases and database names for the view columns. (Bug#28898)

Non-utf8 characters could get mangled when stored in CSV tables. (Bug#28862)

ALTER VIEW is not supported as a prepared statement but was not being rejected. ALTER VIEW is now prohibited as a prepared statement or when called within stored routines. (Bug#28846)

In strict SQL mode, errors silently stopped the SQL thread even for errors named using the --slave-skip-errors option. (Bug#28839)

Runtime changes to the log_queries_not_using_indexes system variable were ignored. (Bug#28808)

Selecting a column not present in the selected-from table caused an extra error to be produced by SHOW ERRORS. (Bug#28677)

For a statement of the form CREATE t1 SELECT integer_constant , the server created the column using the DECIMAL data type for large negative values that are within the range of BIGINT. (Bug#28625)

When one thread attempts to lock two (or more) tables and another thread executes a statement that aborts these locks (such as REPAIR TABLE, OPTIMIZE TABLE, or CHECK TABLE), the thread might get a table object with an incorrect lock type in the table cache. The result is table corruption or a server crash. (Bug#28574)

mysqlbinlog --hexdump generated incorrect output due to omission of the “ # ” comment character for some comment lines. (Bug#28293)

The LOCATE() function returned NULL if any of its arguments evaluated to NULL. Likewise, the predicate, LOCATE(str,NULL) IS NULL, erroneously evaluated to FALSE. (Bug#27932)

The modification of a table by a partially completed multi-column update was not recorded in the binlog, rather than being marked by an event and a corresponding error code. (Bug#27716)

A stack overrun could when storing DATETIME values using repeated prepared statements. (Bug#27592)

Dropping a user-defined function could cause a server crash if the function was still in use by another thread. (Bug#27564)

Fixed a case of unsafe aliasing in the source that caused a client library crash when compiled with gcc 4 at high optimization levels. (Bug#27383)

Index-based range reads could fail for comparisons that involved contraction characters (such as ch in Czech or ll in Spanish). (Bug#27345)

Aggregations in subqueries that refer to outer query columns were not always correctly referenced to the proper outer query. (Bug#27333)

Error returns from the time() system call were ignored. (Bug#27198)

Phantom reads could occur under InnoDB serializable isolation level. (Bug#27197)

The SUBSTRING() function returned the the entire string instead of an empty string when it was called from a stored procedure and when the length parameter was specified by a variable with the value “ 0 ”. (Bug#27130)

ALTER TABLE ... ENABLE KEYS could cause mysqld to crash when executed on a table containing on a MyISAM table containing billions of rows. (Bug#27029)

Binary content 0x00 in a BLOB column sometimes became 0x5C 0x00 following a dump and reload, which could cause problems with data using multi-byte character sets such as GBK (Chinese). This was due to a problem with SELECT INTO OUTFILE whereby LOAD DATA later incorrectly interpreted 0x5C as the second byte of a multi-byte sequence rather than as the SOLIDUS (“\”) character, used by MySQL as the escape character. (Bug#26711)

Index creation could corrupt the table definition in the .frm file: 1) A table with the maximum number of key segments and maximum length key name would have a corrupted .frm file, due to incorrect calculation of the total key length. 2) MyISAM would reject a table with the maximum number of keys and the maximum number of key segments in all keys. (It would allow one less than this total maximum.) Now MyISAM accepts a table defined with the maximum. (Bug#26642)

auto_increment_increment and auto_increment_offset are now supported for NDB tables. (Bug#26342)

The index merge union access algorithm could produce incorrect results with InnoDB tables. The problem could also occur for queries that used DISTINCT. (Bug#25798)

Under ActiveState Perl, mysql-test-run.pl could kill itself when attempting to kill other processes. (Bug#25657)

A query with DISTINCT in the select list to which the loose-scan optimization for grouping queries was applied returned an incorrect result set when the query was used with the SQL_BIG_RESULT option. (Bug#25602)

For a multiple-row insert into a FEDERATED table that refers to a remote transactional table, if the insert failed for a row due to constraint failure, the remote table would contain a partial commit (the rows preceding the failed one) instead of rolling back the statement completely. This occurred because the rows were treated as individual inserts.

Now FEDERATED performs bulk-insert handling such that multiple rows are sent to the remote table in a batch. This provides a performance improvement and enables the remote table to perform statement rollback properly should an error occur. This capability has the following limitations:

(Bug#25513)

The FEDERATED storage engine failed silently for INSERT ... ON DUPLICATE KEY UPDATE if a duplicate key violation occurred. FEDERATED does not support ON DUPLICATE KEY UPDATE, so now it correctly returns an ER_DUP_KEY error if a duplicate key violation occurs. (Bug#25511)

A too-long shared-memory-base-name value could cause a buffer overflow and crash the server or clients. (Bug#24924)

The server deducted some bytes from the key_cache_block_size option value and reduced it to the next lower 512 byte boundary. The resulting block size was not a power of two. Setting the key_cache_block_size system variable to a value that is not a power of two resulted in MyISAM table corruption. (Bug#23068, Bug#28478, Bug#25853)

SHOW BINLOG EVENTS displayed incorrect values of End_log_pos for events associated with transactional storage engines. (Bug#22540)

Under ActiveState Perl, mysql-test-run.pl would not run. (Bug#18415)

The server crashed when the size of an ARCHIVE table grew larger than 2GB. (Bug#15787)

On 64-bit Windows systems, the Config Wizard failed to complete the setup because 64-bit Windows does not resolve dynamic linking of the 64-bit libmysql.dll to a 32-bit application like the Config Wizard. (Bug#14649)

The server returned data from SHOW CREATE TABLE statement or a SELECT statement on an INFORMATION_SCHEMA table using the binary character set. (Bug#10491)

A problem with the fix for Bug#29354 caused an assertion when two local checkpoints were run during node recovery.

Bulk-insert handling does not occur for INSERT ... ON DUPLICATE KEY UPDATE.

The size of the insert cannot exceed the maximum packet size between servers. If the insert exceeds this size, it is broken into multiple packets and the rollback problem can occur.

MySQL Cluster: The server source tree now includes scripts to simplify building MySQL with SCI support. For more information about SCI interconnects and these build scripts, see Section 16.9.1, “Configuring MySQL Cluster to use SCI Sockets”. (Bug#25470)

Enterprise builds did not include the CSV storage engine. CSV is now included in Enterprise builds for all platforms except Windows, QNX, and NetWare. (Bug#28844)

A new status variable, Com_call_procedure, indicates the number of calls to stored procedures. (Bug#27994)

Security Fix: A malformed password packet in the connection protocol could cause the server to crash. Thanks for Dormando for reporting this bug and providing details and a proof of concept. (Bug#28984)

Security Fix: CREATE TABLE LIKE did not require any privileges on the source table. Now it requires the SELECT privilege.

In addition, CREATE TABLE LIKE was not isolated from alteration by other connections, which resulted in various errors and incorrect binary log order when trying to execute concurrently a CREATE TABLE LIKE statement and either DDL statements on the source table or DML or DDL statements on the target table. (Bug#23667, Bug#25578, CVE-2007-3781)

Incompatible Change: When mysqldump was run with the --delete-master-logs option, binary log files were deleted before it was known that the dump had succeeded, not after. (The method for removing log files used RESET MASTER prior to the dump. This also reset the binary log sequence numbering to .000001.) Now mysqldump flushes the logs (which creates a new binary log number with the next sequence number), performs the dump, and then uses PURGE MASTER LOGS to remove the log files older than the new one. This also preserves log numbering because the new log with the next number is generated and only the preceding logs are removed. However, this may affect applications if they rely on the log numbering sequence being reset. (Bug#24733)

Incompatible Change: The use of an ORDER BY or DISTINCT clause with a query containing a call to the GROUP_CONCAT() function caused results from previous queries to be redisplayed in the current result. The fix for this includes replacing a BLOB value used internally for sorting with a VARCHAR. This means that for long results (more than 65,535 bytes), it is possible for truncation to occur; if so, an appropriate warning is issued. (Bug#23856, Bug#28273)

MySQL Cluster: : A corrupt schema file could cause a File already open error. (Bug#28770)

MySQL Cluster: A race condition could result when non-master nodes (in addition to the master node) tried to update active status due to a local checkpoint. Now only the master updates the active status. (Bug#28717)

MySQL Cluster: A fast global checkpoint under high load with a high usage of the redo buffer caused data nodes to fail. (Bug#28653)

MySQL Cluster: When an API node sent more than 1024 signals in a single batch, NDB would process only the first 1024 of these, and then hang. (Bug#28443)

MySQL Cluster: A delay in obtaining AUTO_INCREMENT IDs could lead to excess temporary errors. (Bug#28410)

MySQL Cluster: A failure to release internal resources following an error could lead to problems with single user mode. (Bug#25818)

On the IBM i5 platform, the installation script in *SAVF binaries unconditionally executed the mysql_install_db script. This problem was fixed in a repackaged distribution numbered 5.0.44b. (Bug#30084)

Long pathnames for internal temporary tables could cause stack overflows. (Bug#29015)

Using an INTEGER column from a table to ROUND() a number produced different results than using a constant with the same value as the INTEGER column. (Bug#28980)

If a program binds a given number of parameters to a prepared statement handle and then somehow changes stmt->param_count to a different number, mysql_stmt_execute() could crash the client or server. (Bug#28934)

INSERT .. ON DUPLICATE KEY UPDATE could under some circumstances silently update rows when it should not have. (Bug#28904)

Queries that used UUID() were incorrectly allowed into the query cache. (This should not happen because UUID() is non-deterministic.) (Bug#28897)

Using a VIEW created with a non-existing DEFINER could lead to incorrect results under some circumstances. (Bug#28895)

For InnoDB tables that use the utf8 character set, incorrect results could occur for DML statements such as DELETE or UPDATE that use an index on character-based columns. (Bug#28878)

See also Bug#29449, Bug#30485, Bug#31395

This regression was introduced by Bug#13195

On Windows, USE_TLS was not defined for mysqlclient.lib. (Bug#28860)

A subquery with ORDER BY and LIMIT 1 could cause a server crash. (Bug#28811)

Using BETWEEN with non-indexed date columns and short formats of the date string could return incorrect results. (Bug#28778)

Selecting GEOMETRY columns in a UNION caused a server crash. (Bug#28763)

When constructing the path to the original .frm file, ALTER .. RENAME was unnecessarily (and incorrectly) lowercasing the entire path when not on a case-insensitive filesystem, causing the statement to fail. (Bug#28754)

The actual value of MaxNoOfOpenFiles as used by the cluster was offset by 1 from the value set in config.ini. This meant that setting InitialNoOpenFilesto the same value always caused an error. (Bug#28749)

Searches on indexed and non-indexed ENUM columns could return different results for empty strings. (Bug#28729)

Executing EXPLAIN EXTENDED on a query using a derived table over a grouping subselect could lead to a server crash. This occurred only when materialization of the derived tables required creation of an auxiliary temporary table, an example being when a grouping operation was carried out with usage of a temporary table. (Bug#28728)

UPDATE IGNORE statements involving the primary keys of multiple tables could result in data corruption. (Bug#28719)

The result of evaluation for a view's CHECK OPTION option over an updated record and records of merged tables was arbitrary and dependant on the order of records in the merged tables during the execution of the SELECT statement. (Bug#28716)

The “manager thread” of the LinuxThreads implementation was unintentionally started before mysqld had dropped privileges (to run as an unprivileged user). This caused signaling between threads in mysqld to fail when the privileges were finally dropped. (Bug#28690)

For debug builds, ALTER TABLE could trigger an assertion failure due to occurrence of a deadlock when committing changes. (Bug#28652)

After an upgrade, the names of stored routines referenced by views were no longer displayed by SHOW CREATE VIEW. (Bug#28605)

This regression was introduced by Bug#23491

Killing from one connection a long-running EXPLAIN QUERY started from another connection caused mysqld to crash. (Bug#28598)

Outer join queries with ON conditions over constant outer tables did not return NULL-complemented rows when conditions were evaluated to FALSE. (Bug#28571)

An update on a multiple-table view with the CHECK OPTION clause and a subquery in the WHERE condition could cause an assertion failure. (Bug#28561)

PURGE MASTER LOGS BEFORE (subquery) caused a server crash. Subqueries are forbidden in the BEFORE clause now. (Bug#28553)

mysqldump calculated the required memory for a hex-blob string incorrectly causing a buffer overrun. This in turn caused mysqldump to crash silently and produce incomplete output. (Bug#28522)

Passing a DECIMAL value as a parameter of a statement prepared with PREPARE resulted in an error. (Bug#28509)

mysql_affected_rows() could return an incorrect result for INSERT ... ON DUPLICATE KEY UPDATE if the CLIENT_FOUND_ROWS flag was set. (Bug#28505)

A query that grouped by the result of an expression returned a different result when the expression was assigned to a user variable. (Bug#28494)

Subselects returning LONG values in MySQL versions later than 5.0.24a returned LONGLONG prior to this. The previous behavior was restored. (Bug#28492)

This regression was introduced by Bug#19714

Forcing the use of an index on a SELECT query when the index had been disabled would raise an error without running the query. The query now executes, with a warning generated noting that the use of a disabled index has been ignored. (Bug#28476)

The result of executing of a prepared statement created with PREPARE s FROM "SELECT 1 LIMIT ?" was not replicated correctly. (Bug#28464)

The query SELECT '2007-01-01' + INTERVAL column_name DAY FROM table_name caused mysqld to fail. (Bug#28450)

A server crash could happen under rare conditions such that a temporary table outgrew heap memory reserved for it and the remaining disk space was not big enough to store the table as a MyISAM table. (Bug#28449)

mysql_upgrade failed if certain SQL modes were set. Now it sets the mode itself to avoid this problem. (Bug#28401)

The test case for mysqldump failed with bin-log disabled. (Bug#28372)

Attempting to LOAD_FILE from an empty floppy drive under Windows, caused the server to hang. For example, if you opened a connection to the server and then issued the command SELECT LOAD_FILE('a:test');, with no floppy in the drive, the server was inaccessible until the modal pop-up dialog box was dismissed. (Bug#28366)

A buffer overflow could occur when using DECIMAL columns on Windows operating systems. (Bug#28361)

libmysql.dll could not be dynamically loaded on Windows. (Bug#28358)

Grouping queries with correlated subqueries in WHERE conditions could produce incorrect results. (Bug#28337)

mysqltest used a too-large stack size on PPC/Debian Linux, causing thread-creation failure for tests that use many threads. (Bug#28333)

EXPLAIN for a query on an empty table immediately after its creation could result in a server crash. (Bug#28272)

The IS_UPDATABLE column in the INFORMATION_SCHEMA.VIEWS table was not always set correctly. (Bug#28266)

Comparing a DATETIME column value with a user variable yielded incorrect results. (Bug#28261)

For CAST() of a NULL value with type DECIMAL, the return value was incorrectly initialized, producing a runtime error for binaries built using Visual C++ 2005. (Bug#28250)

Recreating a view that already exists on the master would cause a replicating slave to terminate replication with a 'different error message on slave and master' error. (Bug#28244)

Portability problems caused by use of isinf() were corrected. (Bug#28240)

When dumping procedures, mysqldump --compact generated output that restored the session variable SQL_MODE without first capturing it. When dumping routines, mysqldump --compact neither set nor retrieved the value of SQL_MODE. (Bug#28223)

Comparison of the string value of a date showed as unequal to CURTIME(). Similar behavior was exhibited for DATETIME values. (Bug#28208)

The Bytes_received and Bytes_sent status variables could hold only 32-bit values (not 64-bit values) on some platforms. (Bug#28149)

Storing a large number into a FLOAT or DOUBLE column with a fixed length could result in incorrect truncation of the number if the column's length was greater than 31. (Bug#28121)

The BLACKHOLE storage engine does not support INSERT DELAYED statements, but they were not being rejected. (Bug#27998)

DECIMAL values beginning with nine 9 digits could be incorrectly rounded. (Bug#27984)

The second execution of a prepared statement from a UNION query with ORDER BY RAND() caused the server to crash. This problem could also occur when invoking a stored procedure containing such a query. (Bug#27937)

For attempts to open a non-existent table, the server should report ER_NO_SUCH_TABLE but sometimes reported ER_TABLE_NOT_LOCKED. (Bug#27907)

A stored program that uses a variable name containing multibyte characters could fail to execute. (Bug#27876)

ON conditions from JOIN expressions were ignored when checking the CHECK OPTION clause while updating a multiple-table view that included such a clause. (Bug#27827)

On some systems, udf_example.c returned an incorrect result length. Also on some systems, mysql-test-run.pl could not find the shared object built from udf_example.c. (Bug#27741)

HASH indexes on VARCHAR columns with binary collations did not ignore trailing spaces from strings before comparisons. This could result in duplicate records being successfully inserted into a MEMORY table with unique key constraints. A consequence was that internal MEMORY tables used for GROUP BY calculation contained duplicate rows that resulted in duplicate-key errors when converting those temporary tables to MyISAM, and that error was incorrectly reported as a table is full error. (Bug#27643)

An error occurred trying to connect to mysqld-debug.exe. (Bug#27597)

Selecting MIN() on an indexed column that contained only NULL values caused NULL to be returned for other result columns. (Bug#27573)

If a stored function or trigger was killed, it aborted but no error was thrown, allowing the calling statement to continue without noticing the problem. This could lead to incorrect results. (Bug#27563)

When ALTER TABLE was used to add a new DATE column with no explicit default value, '0000-00-00' was used as the default even if the SQL mode included the NO_ZERO_DATE mode to prohibit that value. A similar problem occurred for DATETIME columns. (Bug#27507)

Using a TEXT local variable in a stored routine in an expression such as SET var = SUBSTRING(var, 3) produced an incorrect result. (Bug#27415)

The error message for error number 137 did not report which database/table combination reported the problem. (Bug#27173)

A large filesort could result in a division by zero error and a server crash. (Bug#27119)

Binary logging of prepared statements could produce syntactically incorrect queries in the binary log, replacing some parameters with variable names rather than variable values. This could lead to incorrect results on replication slaves. (Bug#26842, Bug#12826)

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

Some test suite files were missing from some MySQL-test packages. (Bug#26609)

Statements within triggers ignored the value of the low_priority_updates system variable. (Bug#26162)

Running CHECK TABLE concurrently with a SELECT, INSERT or other statement on Windows could corrupt a MyISAM table. (Bug#25712)

On Windows, connection handlers did not properly decrement the server's thread count when exiting. (Bug#25621)

Due to a race condition, executing FLUSH PRIVILEGES in one thread could cause brief table unavailability in other threads. (Bug#24988)

On some Linux distributions where LinuxThreads and NPTL glibc versions both are available, statically built binaries can crash because the linker defaults to LinuxThreads when linking statically, but calls to external libraries (such as libnss) are resolved to NPTL versions. This cannot be worked around in the code, so instead if a crash occurs on such a binary/OS combination, print an error message that provides advice about how to fix the problem. (Bug#24611)

Implicit conversion of 9912101 to DATE did not match CAST(9912101 AS DATE). (Bug#23093)

Conversion errors could occur when constructing the condition for an IN predicate. The predicate was treated as if the affected column contains NULL, but if the IN predicate is inside NOT, incorrect results could be returned. (Bug#22855)

When using transactions and replication, shutting down the master in the middle of a transaction would cause all slaves to stop replicating. (Bug#22725)

Linux binaries were unable to dump core after executing a setuid() call. (Bug#21723)

Stack overflow caused server crashes. (Bug#21476)

CURDATE() is less than NOW(), either when comparing CURDATE() directly (CURDATE() < NOW() is true) or when casting CURDATE() to DATE (CAST(CURDATE() AS DATE) < NOW() is true). However, storing CURDATE() in a DATE column and comparing col_name < NOW() incorrectly yielded false. This is fixed by comparing a DATE column as DATETIME for comparisons to a DATETIME constant. (Bug#21103)

For dates with 4-digit year parts less than 200, an incorrect implicit conversion to add a century was applied for date arithmetic performed with DATE_ADD(), DATE_SUB(), + INTERVAL, and - INTERVAL. (For example, DATE_ADD('0050-01-01 00:00:00', INTERVAL 0 SECOND) became '2050-01-01 00:00:00'.) (Bug#18997)

Using CREATE TABLE LIKE ... would raise an assertion when replicated to a slave. (Bug#18950)

Granting access privileges to an individual table where the database or table name contained an underscore would fail. (Bug#18660)

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)

The check-cpu script failed to detect AMD64 Turion processors correctly. (Bug#17707)

Trying to shut down the server following a failed LOAD DATA INFILE caused mysqld to crash. (Bug#17233)

Using up-arrow for command-line recall in mysql could cause a segmentation fault. (Bug#10218)

The result for CAST() when casting a value to UNSIGNED was limited to the maximum signed BIGINT value (9223372036854775808), not the maximum unsigned value (18446744073709551615). (Bug#8663)

MySQL Cluster: The server source tree now includes scripts to simplify building MySQL with SCI support. For more information about SCI interconnects and these build scripts, see Section 16.9.1, “Configuring MySQL Cluster to use SCI Sockets”. (Bug#25470)

Enterprise builds did not include the CSV storage engine. CSV is now included in Enterprise builds for all platforms except Windows, QNX, and NetWare. (Bug#28844)

A new status variable, Com_call_procedure, indicates the number of calls to stored procedures. (Bug#27994)

Security Fix: A malformed password packet in the connection protocol could cause the server to crash. Thanks for Dormando for reporting this bug and providing details and a proof of concept. (Bug#28984)

Security Fix: CREATE TABLE LIKE did not require any privileges on the source table. Now it requires the SELECT privilege.

In addition, CREATE TABLE LIKE was not isolated from alteration by other connections, which resulted in various errors and incorrect binary log order when trying to execute concurrently a CREATE TABLE LIKE statement and either DDL statements on the source table or DML or DDL statements on the target table. (Bug#23667, Bug#25578, CVE-2007-3781)

Incompatible Change: When mysqldump was run with the --delete-master-logs option, binary log files were deleted before it was known that the dump had succeeded, not after. (The method for removing log files used RESET MASTER prior to the dump. This also reset the binary log sequence numbering to .000001.) Now mysqldump flushes the logs (which creates a new binary log number with the next sequence number), performs the dump, and then uses PURGE MASTER LOGS to remove the log files older than the new one. This also preserves log numbering because the new log with the next number is generated and only the preceding logs are removed. However, this may affect applications if they rely on the log numbering sequence being reset. (Bug#24733)

Incompatible Change: The use of an ORDER BY or DISTINCT clause with a query containing a call to the GROUP_CONCAT() function caused results from previous queries to be redisplayed in the current result. The fix for this includes replacing a BLOB value used internally for sorting with a VARCHAR. This means that for long results (more than 65,535 bytes), it is possible for truncation to occur; if so, an appropriate warning is issued. (Bug#23856, Bug#28273)

MySQL Cluster: : A corrupt schema file could cause a File already open error. (Bug#28770)

MySQL Cluster: A race condition could result when non-master nodes (in addition to the master node) tried to update active status due to a local checkpoint. Now only the master updates the active status. (Bug#28717)

MySQL Cluster: A fast global checkpoint under high load with a high usage of the redo buffer caused data nodes to fail. (Bug#28653)

MySQL Cluster: When an API node sent more than 1024 signals in a single batch, NDB would process only the first 1024 of these, and then hang. (Bug#28443)

MySQL Cluster: A delay in obtaining AUTO_INCREMENT IDs could lead to excess temporary errors. (Bug#28410)

MySQL Cluster: A failure to release internal resources following an error could lead to problems with single user mode. (Bug#25818)

On the IBM i5 platform, the installation script in *SAVF binaries unconditionally executed the mysql_install_db script. This problem was fixed in a repackaged distribution numbered 5.0.44b. (Bug#30084)

Long pathnames for internal temporary tables could cause stack overflows. (Bug#29015)

Using an INTEGER column from a table to ROUND() a number produced different results than using a constant with the same value as the INTEGER column. (Bug#28980)

If a program binds a given number of parameters to a prepared statement handle and then somehow changes stmt->param_count to a different number, mysql_stmt_execute() could crash the client or server. (Bug#28934)

INSERT .. ON DUPLICATE KEY UPDATE could under some circumstances silently update rows when it should not have. (Bug#28904)

Queries that used UUID() were incorrectly allowed into the query cache. (This should not happen because UUID() is non-deterministic.) (Bug#28897)

Using a VIEW created with a non-existing DEFINER could lead to incorrect results under some circumstances. (Bug#28895)

For InnoDB tables that use the utf8 character set, incorrect results could occur for DML statements such as DELETE or UPDATE that use an index on character-based columns. (Bug#28878)

See also Bug#29449, Bug#30485, Bug#31395

This regression was introduced by Bug#13195

On Windows, USE_TLS was not defined for mysqlclient.lib. (Bug#28860)

A subquery with ORDER BY and LIMIT 1 could cause a server crash. (Bug#28811)

Using BETWEEN with non-indexed date columns and short formats of the date string could return incorrect results. (Bug#28778)

Selecting GEOMETRY columns in a UNION caused a server crash. (Bug#28763)

When constructing the path to the original .frm file, ALTER .. RENAME was unnecessarily (and incorrectly) lowercasing the entire path when not on a case-insensitive filesystem, causing the statement to fail. (Bug#28754)

The actual value of MaxNoOfOpenFiles as used by the cluster was offset by 1 from the value set in config.ini. This meant that setting InitialNoOpenFilesto the same value always caused an error. (Bug#28749)

Searches on indexed and non-indexed ENUM columns could return different results for empty strings. (Bug#28729)

Executing EXPLAIN EXTENDED on a query using a derived table over a grouping subselect could lead to a server crash. This occurred only when materialization of the derived tables required creation of an auxiliary temporary table, an example being when a grouping operation was carried out with usage of a temporary table. (Bug#28728)

UPDATE IGNORE statements involving the primary keys of multiple tables could result in data corruption. (Bug#28719)

The result of evaluation for a view's CHECK OPTION option over an updated record and records of merged tables was arbitrary and dependant on the order of records in the merged tables during the execution of the SELECT statement. (Bug#28716)

The “manager thread” of the LinuxThreads implementation was unintentionally started before mysqld had dropped privileges (to run as an unprivileged user). This caused signaling between threads in mysqld to fail when the privileges were finally dropped. (Bug#28690)

For debug builds, ALTER TABLE could trigger an assertion failure due to occurrence of a deadlock when committing changes. (Bug#28652)

After an upgrade, the names of stored routines referenced by views were no longer displayed by SHOW CREATE VIEW. (Bug#28605)

This regression was introduced by Bug#23491

Killing from one connection a long-running EXPLAIN QUERY started from another connection caused mysqld to crash. (Bug#28598)

Outer join queries with ON conditions over constant outer tables did not return NULL-complemented rows when conditions were evaluated to FALSE. (Bug#28571)

An update on a multiple-table view with the CHECK OPTION clause and a subquery in the WHERE condition could cause an assertion failure. (Bug#28561)

PURGE MASTER LOGS BEFORE (subquery) caused a server crash. Subqueries are forbidden in the BEFORE clause now. (Bug#28553)

mysqldump calculated the required memory for a hex-blob string incorrectly causing a buffer overrun. This in turn caused mysqldump to crash silently and produce incomplete output. (Bug#28522)

Passing a DECIMAL value as a parameter of a statement prepared with PREPARE resulted in an error. (Bug#28509)

mysql_affected_rows() could return an incorrect result for INSERT ... ON DUPLICATE KEY UPDATE if the CLIENT_FOUND_ROWS flag was set. (Bug#28505)

A query that grouped by the result of an expression returned a different result when the expression was assigned to a user variable. (Bug#28494)

Subselects returning LONG values in MySQL versions later than 5.0.24a returned LONGLONG prior to this. The previous behavior was restored. (Bug#28492)

This regression was introduced by Bug#19714

Forcing the use of an index on a SELECT query when the index had been disabled would raise an error without running the query. The query now executes, with a warning generated noting that the use of a disabled index has been ignored. (Bug#28476)

The result of executing of a prepared statement created with PREPARE s FROM "SELECT 1 LIMIT ?" was not replicated correctly. (Bug#28464)

The query SELECT '2007-01-01' + INTERVAL column_name DAY FROM table_name caused mysqld to fail. (Bug#28450)

A server crash could happen under rare conditions such that a temporary table outgrew heap memory reserved for it and the remaining disk space was not big enough to store the table as a MyISAM table. (Bug#28449)

mysql_upgrade failed if certain SQL modes were set. Now it sets the mode itself to avoid this problem. (Bug#28401)

The test case for mysqldump failed with bin-log disabled. (Bug#28372)

Attempting to LOAD_FILE from an empty floppy drive under Windows, caused the server to hang. For example, if you opened a connection to the server and then issued the command SELECT LOAD_FILE('a:test');, with no floppy in the drive, the server was inaccessible until the modal pop-up dialog box was dismissed. (Bug#28366)

A buffer overflow could occur when using DECIMAL columns on Windows operating systems. (Bug#28361)

libmysql.dll could not be dynamically loaded on Windows. (Bug#28358)

Grouping queries with correlated subqueries in WHERE conditions could produce incorrect results. (Bug#28337)

mysqltest used a too-large stack size on PPC/Debian Linux, causing thread-creation failure for tests that use many threads. (Bug#28333)

EXPLAIN for a query on an empty table immediately after its creation could result in a server crash. (Bug#28272)

The IS_UPDATABLE column in the INFORMATION_SCHEMA.VIEWS table was not always set correctly. (Bug#28266)

Comparing a DATETIME column value with a user variable yielded incorrect results. (Bug#28261)

For CAST() of a NULL value with type DECIMAL, the return value was incorrectly initialized, producing a runtime error for binaries built using Visual C++ 2005. (Bug#28250)

Recreating a view that already exists on the master would cause a replicating slave to terminate replication with a 'different error message on slave and master' error. (Bug#28244)

Portability problems caused by use of isinf() were corrected. (Bug#28240)

When dumping procedures, mysqldump --compact generated output that restored the session variable SQL_MODE without first capturing it. When dumping routines, mysqldump --compact neither set nor retrieved the value of SQL_MODE. (Bug#28223)

Comparison of the string value of a date showed as unequal to CURTIME(). Similar behavior was exhibited for DATETIME values. (Bug#28208)

The Bytes_received and Bytes_sent status variables could hold only 32-bit values (not 64-bit values) on some platforms. (Bug#28149)

Storing a large number into a FLOAT or DOUBLE column with a fixed length could result in incorrect truncation of the number if the column's length was greater than 31. (Bug#28121)

The BLACKHOLE storage engine does not support INSERT DELAYED statements, but they were not being rejected. (Bug#27998)

DECIMAL values beginning with nine 9 digits could be incorrectly rounded. (Bug#27984)

The second execution of a prepared statement from a UNION query with ORDER BY RAND() caused the server to crash. This problem could also occur when invoking a stored procedure containing such a query. (Bug#27937)

For attempts to open a non-existent table, the server should report ER_NO_SUCH_TABLE but sometimes reported ER_TABLE_NOT_LOCKED. (Bug#27907)

A stored program that uses a variable name containing multibyte characters could fail to execute. (Bug#27876)

ON conditions from JOIN expressions were ignored when checking the CHECK OPTION clause while updating a multiple-table view that included such a clause. (Bug#27827)

On some systems, udf_example.c returned an incorrect result length. Also on some systems, mysql-test-run.pl could not find the shared object built from udf_example.c. (Bug#27741)

HASH indexes on VARCHAR columns with binary collations did not ignore trailing spaces from strings before comparisons. This could result in duplicate records being successfully inserted into a MEMORY table with unique key constraints. A consequence was that internal MEMORY tables used for GROUP BY calculation contained duplicate rows that resulted in duplicate-key errors when converting those temporary tables to MyISAM, and that error was incorrectly reported as a table is full error. (Bug#27643)

An error occurred trying to connect to mysqld-debug.exe. (Bug#27597)

Selecting MIN() on an indexed column that contained only NULL values caused NULL to be returned for other result columns. (Bug#27573)

If a stored function or trigger was killed, it aborted but no error was thrown, allowing the calling statement to continue without noticing the problem. This could lead to incorrect results. (Bug#27563)

When ALTER TABLE was used to add a new DATE column with no explicit default value, '0000-00-00' was used as the default even if the SQL mode included the NO_ZERO_DATE mode to prohibit that value. A similar problem occurred for DATETIME columns. (Bug#27507)

Using a TEXT local variable in a stored routine in an expression such as SET var = SUBSTRING(var, 3) produced an incorrect result. (Bug#27415)

The error message for error number 137 did not report which database/table combination reported the problem. (Bug#27173)

A large filesort could result in a division by zero error and a server crash. (Bug#27119)

Binary logging of prepared statements could produce syntactically incorrect queries in the binary log, replacing some parameters with variable names rather than variable values. This could lead to incorrect results on replication slaves. (Bug#26842, Bug#12826)

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

Some test suite files were missing from some MySQL-test packages. (Bug#26609)

Statements within triggers ignored the value of the low_priority_updates system variable. (Bug#26162)

Running CHECK TABLE concurrently with a SELECT, INSERT or other statement on Windows could corrupt a MyISAM table. (Bug#25712)

On Windows, connection handlers did not properly decrement the server's thread count when exiting. (Bug#25621)

Due to a race condition, executing FLUSH PRIVILEGES in one thread could cause brief table unavailability in other threads. (Bug#24988)

On some Linux distributions where LinuxThreads and NPTL glibc versions both are available, statically built binaries can crash because the linker defaults to LinuxThreads when linking statically, but calls to external libraries (such as libnss) are resolved to NPTL versions. This cannot be worked around in the code, so instead if a crash occurs on such a binary/OS combination, print an error message that provides advice about how to fix the problem. (Bug#24611)

Implicit conversion of 9912101 to DATE did not match CAST(9912101 AS DATE). (Bug#23093)

Conversion errors could occur when constructing the condition for an IN predicate. The predicate was treated as if the affected column contains NULL, but if the IN predicate is inside NOT, incorrect results could be returned. (Bug#22855)

When using transactions and replication, shutting down the master in the middle of a transaction would cause all slaves to stop replicating. (Bug#22725)

Linux binaries were unable to dump core after executing a setuid() call. (Bug#21723)

Stack overflow caused server crashes. (Bug#21476)

CURDATE() is less than NOW(), either when comparing CURDATE() directly (CURDATE() < NOW() is true) or when casting CURDATE() to DATE (CAST(CURDATE() AS DATE) < NOW() is true). However, storing CURDATE() in a DATE column and comparing col_name < NOW() incorrectly yielded false. This is fixed by comparing a DATE column as DATETIME for comparisons to a DATETIME constant. (Bug#21103)

For dates with 4-digit year parts less than 200, an incorrect implicit conversion to add a century was applied for date arithmetic performed with DATE_ADD(), DATE_SUB(), + INTERVAL, and - INTERVAL. (For example, DATE_ADD('0050-01-01 00:00:00', INTERVAL 0 SECOND) became '2050-01-01 00:00:00'.) (Bug#18997)

Using CREATE TABLE LIKE ... would raise an assertion when replicated to a slave. (Bug#18950)

Granting access privileges to an individual table where the database or table name contained an underscore would fail. (Bug#18660)

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)

The check-cpu script failed to detect AMD64 Turion processors correctly. (Bug#17707)

Trying to shut down the server following a failed LOAD DATA INFILE caused mysqld to crash. (Bug#17233)

Using up-arrow for command-line recall in mysql could cause a segmentation fault. (Bug#10218)

The result for CAST() when casting a value to UNSIGNED was limited to the maximum signed BIGINT value (9223372036854775808), not the maximum unsigned value (18446744073709551615). (Bug#8663)

Prior to this release, when DATE values were compared with DATETIME values the time portion of the DATETIME value was ignored. Now a DATE value is coerced to the DATETIME type by adding the time portion as “00:00:00”. To mimic the old behavior use the CAST() function in the following way: SELECT date_field = CAST(NOW() as DATE);. (Bug#28929)

mysqld_multi now understands the --no-defaults, --defaults-file, and --defaults-extra-file options. The --config-file option is deprecated; if given, it is treated like --defaults-extra-file. (Bug#27390)

Security Fix: Use of a view could allow a user to gain update privileges for tables in other databases. (Bug#27878, CVE-2007-3782)

Security Fix: The requirement of the DROP privilege for RENAME TABLE was not being enforced. (Bug#27515, CVE-2007-2691)

Security Fix: If a stored routine was declared using SQL SECURITY INVOKER, a user who invoked the routine could gain privileges. (Bug#27337, CVE-2007-2692)

MySQL Cluster: INSERT IGNORE wrongly ignored NULL values in unique indexes. (Bug#27980)

MySQL Cluster: The name of the month “March” was given incorrectly in the cluster error log. (Bug#27926)

MySQL Cluster: It was not possible to add a unique index to an NDB table while in single user mode. (Bug#27710)

MySQL Cluster: Repeated insertion of data generated by mysqldump into NDB tables could eventually lead to failure of the cluster. (Bug#27437)

MySQL Cluster: (APIs): For BLOB reads on operations with lock mode LM_CommittedRead, the lock mode was not upgraded to LM_Read before the state of the BLOB had already been calculated. The NDB API methods affected by this problem included the following:

(Bug#27320)

MySQL Cluster: ndb_connectstring did not appear in the output of SHOW VARIABLES. (Bug#26675)

On the IBM i5 platform, the installation script in *SAVF binaries unconditionally executed the mysql_install_db script. This problem was fixed in a repackaged distribution numbered 5.0.42b. (Bug#30084)

A query with a NOT IN subquery predicate could cause a crash when the left operand of the predicate evaluated to NULL. (Bug#28375)

For InnoDB, in some rare cases the optimizer preferred a more expensive ref access to a less expensive range access. (Bug#28189)

A performance degradation was observed for outer join queries to which a not-exists optimization was applied. (Bug#28188)

SELECT * INTO OUTFILE ... FROM INFORMATION_SCHEMA.schemata failed with an Access denied error, even for a user who has the FILE privilege. (Bug#28181)

Comparisons of DATE or DATETIME values for the IN() function could yield incorrect results. (Bug#28133)

The cluster waited 30 seconds instead of 30 milliseconds before reading table statistics. (Bug#28093)

The server could hang for INSERT IGNORE ... ON DUPLICATE KEY UPDATE if an update failed. (Bug#28000)

CAST() to DECIMAL did not check for overflow. (Bug#27957)

For INSERT ... ON DUPLICATE KEY UPDATE statements that affected many rows, updates could be applied to the wrong rows. (Bug#27954)

Early NULL-filtering optimization did not work for eq_ref table access. (Bug#27939)

Views ignored precision for CAST() operations. (Bug#27921)

Non-grouped columns were allowed by * in ONLY_FULL_GROUP_BY SQL mode. (Bug#27874)

Debug builds on Windows generated false alarms about uninitialized variables with some Visual Studio runtime libraries. (Bug#27811)

Certain queries that used uncorrelated scalar subqueries caused EXPLAIN to to crash. (Bug#27807)

Changes to some system variables should invalidate statements in the query cache, but invalidation did not happen. (Bug#27792)

Performing a UNION on two views that had had ORDER BY clauses resulted in an Unknown column error. (Bug#27786)

mysql_install_db is supposed to detect existing system tables and create only those that do not exist. Instead, it was exiting with an error if tables already existed. (Bug#27783)

mysqld did not check the length of option values and could crash with a buffer overflow for long values. (Bug#27715)

Comparisons using row constructors could fail for rows containing NULL values. (Bug#27704)

LOAD DATA did not use CURRENT_TIMESTAMP as the default value for a TIMESTAMP column for which no value was provided. (Bug#27670)

mysqldump could not connect using SSL. (Bug#27669)

On Linux, the server could not create temporary tables if lower_case_table_names was set to 1 and the value of tmpdir was a directory name containing any uppercase letters. (Bug#27653)

For InnoDB tables, a multiple-row INSERT of the form INSERT INTO t (id...) VALUES (NULL...) ON DUPLICATE KEY UPDATE id=VALUES(id), where id is an AUTO_INCREMENT column, could cause ERROR 1062 (23000): Duplicate entry... errors or lost rows. (Bug#27650)

The XML output representing an empty result was an empty string rather than an empty <resultset/> element. (Bug#27608)

Comparison of a DATE with a DATETIME did not treat the DATE as having a time part of 00:00:00. (Bug#27590)

The fix for Bug#17212 provided correct sort order for misordered output of certain queries, but caused significant overall query performance degradation. (Results were correct (good), but returned much more slowly (bad).) The fix also affected performance of queries for which results were correct. The performance degradation has been addressed. (Bug#27531)

The CRC32() function returns an unsigned integer, but the metadata was signed, which could cause certain queries to return incorrect results. (For example, queries that selected a CRC32() value and used that value in the GROUP BY clause.) (Bug#27530)

An interaction between SHOW TABLE STATUS and other concurrent statements that modify the table could result in a divide-by-zero error and a server crash. (Bug#27516)

A race condition between DROP TABLE and SHOW TABLE STATUS could cause the latter to display incorrect information. (Bug#27499)

Nested aggregate functions could be improperly evaluated. (Bug#27363)

A stored function invocation in the WHERE clause was treated as a constant. (Bug#27354)

Failure to allocate memory associated with transaction_prealloc_size could cause a server crash. (Bug#27322)

mysqldump crashed if it got no data from SHOW CREATE PROCEDURE (for example, when trying to dump a routine defined by a different user and for which the current user had no privileges). Now it prints a comment to indicate the problem. It also returns an error, or continues if the --force option is given. (Bug#27293)

mysqlbinlog produced different output with the -R option than without it. (Bug#27171)

Flow control optimization in stored routines could cause exception handlers to never return or execute incorrect logic. (Bug#26977)

mysqldump would not dump a view for which the DEFINER no longer exists. (Bug#26817)

Creating a temporary table with InnoDB when using the one-file-per-table setting, when the host filesystem for temporary tables is tmpfs would cause an assertion within mysqld. This was due to the use of O_DIRECT when opening the temporary table file. (Bug#26662)

mysql_upgrade did not detect failure of external commands that it runs. (Bug#26639)

Aborting a statement on the master that applied to a non-transactional statement broke replication. The statement was written to the binary log but not completely executed on the master. Slaves receiving the statement executed it completely, resulting in loss of data synchrony. Now an error code is written to the error log so that the slaves stop without executing the aborted statement. (That is, replication stops, but synchrony to the point of the stop is preserved and you can investigate the problem.) (Bug#26551)

Index hints (USE INDEX, IGNORE INDEX, FORCE INDEX) cannot be used with FULLTEXT indexes, but were not being ignored. (Bug#25951)

If CREATE TABLE t1 LIKE t2 failed due to a full disk, an empty t2.frm file could be created but not removed. This file then caused subsequent attempts to create a table named t2 to fail. This is easily corrected at the filesystem level by removing the t2.frm file manually, but now the server removes the file if the create operation does not complete successfully. (Bug#25761)

mysql_upgrade did not pass a password to mysqlcheck if one was given. (Bug#25452)

On Windows, mysql_upgrade was sensitive to lettercase of the names of some required components. (Bug#25405)

For storage engines that allow the current auto-increment value to be set, using ALTER TABLE ... ENGINE to convert a table from one such storage engine to another caused loss of the current value. (For storage engines that do not support setting the value, it cannot be retained anyway when changing the storage engine.) (Bug#25262)

Restoration of the default database after stored routine or trigger execution on a slave could cause replication to stop if the database no longer existed. (Bug#25082)

Several math functions produced incorrect results for large unsigned values. ROUND() produced incorrect results or a crash for a large number-of-decimals argument. (Bug#24912)

The result set of a query that used WITH ROLLUP and DISTINCT could lack some rollup rows (rows with NULL values for grouping attributes) if the GROUP BY list contained constant expressions. (Bug#24856)

For queries that used ORDER BY with InnoDB tables, if the optimizer chose an index for accessing the table but found a covering index that enabled the ORDER BY to be skipped, no results were returned. (Bug#24778)

Concurrent execution of CREATE TABLE ... SELECT and other statements involving the target table suffered from various race conditions, some of which might have led to deadlocks. (Bug#24738)

An attempt to execute CREATE TABLE ... SELECT when a temporary table with the same name already existed led to the insertion of data into the temporary table and creation of an empty non-temporary table. (Bug#24508)

The MERGE storage engine could return incorrect results when several index values that compare equality were present in an index (for example, 'gross' and 'gross ', which are considered equal but have different lengths). (Bug#24342)

Some upgrade problems are detected and better error messages suggesting that mysql_upgrade be run are produced. (Bug#24248)

Some views could not be created even when the user had the requisite privileges. (Bug#24040)

Using CAST() to convert DATETIME values to numeric values did not work. (Bug#23656)

The AUTO_INCREMENT value would not be correctly reported for InnoDB tables when using SHOW CREATE TABLE statement or mysqldump command. (Bug#23313)

SELECT COUNT(*) from a table containing a DATETIME NOT NULL column could produce spurious warnings with the NO_ZERO_DATE SQL mode enabled. (Bug#22824)

Using SET GLOBAL to change the lc_time_names system variable had no effect on new connections. (Bug#22648)

A multiple-table UPDATE could return an incorrect rows-matched value if, during insertion of rows into a temporary table, the table had to be converted from a MEMORY table to a MyISAM table. (Bug#22364)

yaSSL crashed on pre-Pentium Intel CPUs. (Bug#21765)

A slave that used --master-ssl-cipher could not connect to the master. (Bug#21611)

Quoted labels in stored routines were mishandled, rendering the routines unusable. (Bug#21513)

The server could abort or deadlock for INSERT DELAYED statements for which another insert was performed implicitly (for example, via a stored function that inserted a row). (Bug#21483)

CREATE TABLE IF NOT EXISTS ... SELECT caused a server crash if the target table already existed and had a BEFORE INSERT trigger. (Bug#20903)

Deadlock occurred for attempts to execute CREATE TABLE IF NOT EXISTS ... SELECT when LOCK TABLES had been used to acquire a read lock on the target table. (Bug#20662, Bug#15522)

Changing a utf8 column in an InnoDB table to a shorter length did not shorten the data values. (Bug#20095)

The omission of leading zeros in dates could lead to erroneous results when these were compared with the output of certain date and time functions. (Bug#16377)

INSERT...ON DUPLICATE KEY UPDATE could cause Error 1032: Can't find record in ... for inserts into an InnoDB table unique index using key column prefixes with an underlying utf8 string column. (Bug#13191)

Having the EXECUTE privilege for a routine in a database should make it possible to USE that database, but the server returned an error instead. This has been corrected. As a result of the change, SHOW TABLES for a database in which you have only the EXECUTE privilege returns an empty set rather than an error. (Bug#9504)

MySQL Cluster: Several options have been added for use with ndb_restore --print_data to facilitate the creation of data dump files. (Bug#26900)

If a set function S with an outer reference S(outer_ref) cannot be aggregated in the outer query against which the outer reference has been resolved, MySQL interprets S(outer_ref) the same way that it would interpret S(const). However, standard SQL requires throwing an error in this situation. An error now is thrown for such queries if the ANSI SQL mode is enabled. (Bug#27348)

Added the --service-startup-timeout option for mysql.server to specify how long to wait for the server to start. If the server does not start within the timeout period, mysql.server exits with an error. (Bug#26952)

It is now possible to restore selected databases or tables using ndb_restore. (Bug#26899)

Prefix lengths for columns in SPATIAL indexes are no longer displayed in SHOW CREATE TABLE output. mysqldump uses that statement, so if a table with SPATIAL indexes containing prefixed columns is dumped and reloaded, the index is created with no prefixes. (The full column width of each column is indexed.) (Bug#26794)

The output of mysql --xml and mysqldump --xml now includes a valid XML namespace. (Bug#25946)

If you use SSL for a client connection, you can tell the client not to authenticate the server certificate by specifying neither --ssl-ca nor --ssl-capath. The server still verifies the client according to any applicable requirements established via GRANT statements for the client, and it still uses any --ssl-ca/--ssl-capath values that were passed to server at startup time. (Bug#25309)

The syntax for index hints has been extended to enable explicit specification that the hint applies only to join processing. See Section 12.2.7.2, “Index Hint Syntax”. (Bug#21174)

The mysql_create_system_tables script was removed because mysql_install_db no longer uses it in MySQL 5.0.

Important Note: The parser accepted invalid code in SQL condition handlers, leading to server crashes or unexpected execution behavior in stored programs. Specifically, the parser allowed a condition handler to refer to labels for blocks that enclose the handler declaration. This was incorrect because block label scope does not include the code for handlers declared within the labeled block.

The parser now rejects this invalid construct, but if you upgrade in place (without dumping and reloading your databases), existing handlers that contain the construct still are invalid even if they appear to function as you expect and should be rewritten.

To find affected handlers, use mysqldump to dump all stored functions and procedures, triggers, and events. Then attempt to reload them into an upgraded server. Handlers that contain illegal label references will be rejected.

For more information about condition handlers and writing them to avoid invalid jumps, see Section 18.2.8.2, “DECLARE Handlers”. (Bug#26503)

MySQL Cluster: NDB tables having MEDIUMINT AUTO_INCREMENT columns were not restored correctly by ndb_restore, causing spurious duplicate key errors. This issue did not affect TINYINT, INT, or BIGINT columns with AUTO_INCREMENT. (Bug#27775)

MySQL Cluster: NDB tables with indexes whose names contained space characters were not restored correctly by ndb_restore (the index names were truncated). (Bug#27758)

MySQL Cluster: Some queries that updated multiple tables were not backed up correctly. (Bug#27748)

MySQL Cluster: Memory usage of a mysqld process grew even while idle. (Bug#27560)

MySQL Cluster: It was not possible to set LockPagesInMainMemory equal to 0. (Bug#27291)

MySQL Cluster: Error messages displayed when running in single user mode were inconsistent. (Bug#27021)

MySQL Cluster: (APIs): Using NdbBlob::writeData() to write data in the middle of an existing blob value (that is, updating the value) could overwrite some data past the end of the data to be changed. (Bug#27018)

MySQL Cluster: The failure of a data node while restarting could cause other data nodes to hang or crash. (Bug#27003)

MySQL Cluster: On Solaris, the value of an NDB table column declared as BIT(33) was always displayed as 0. (Bug#26986)

MySQL Cluster: The output from ndb_restore --print_data was incorrect for a backup made of a database containing tables with TINYINT or SMALLINT columns. (Bug#26740)

MySQL Cluster: In some cases, AFTER UPDATE and AFTER DELETE triggers on NDB tables that referenced subject table did not see the results of operation which caused invocation of the trigger, but rather saw the row as it was prior to the update or delete operation.

This was most noticeable when an update operation used a subquery to obtain the rows to be updated. An example would be UPDATE tbl1 SET col2 = val1 WHERE tbl1.col1 IN (SELECT col3 FROM tbl2 WHERE c4 = val2) where there was an AFTER UPDATE trigger on table tbl1. In such cases, the trigger would fail to execute.

The problem occurred because the actual update or delete operations were deferred to be able to perform them later as one batch. The fix for this bug solves the problem by disabling this optimization for a given update or delete if the table has an AFTER trigger defined for this operation. (Bug#26242)

MySQL Cluster: Condition pushdown did not work with prepared statements. (Bug#26225)

MySQL Cluster: Joins on multiple tables containing BLOB columns could cause data nodes run out of memory, and to crash with the error NdbObjectIdMap::expand unable to expand. (Bug#26176)

MySQL Cluster: After entering single user mode it was not possible to alter non-NDB tables on any SQL nodes other than the one having sole access to the cluster. (Bug#25275)

MySQL Cluster: When a cluster node suffered a “hard” failure (such as a power failure or loss of a network connection) TCP sockets to the “vanished” node were maintained indefinitely. Now socket-based transporters check for a response and terminate the socket if there is no activity on the socket after 2 hours. (Bug#24793)

MySQL Cluster: The management client command node_id STATUS displayed the message Node node_id: not connected when node_id was not the node ID of a data node.

(Bug#21715)

MySQL Cluster: Some values of MaxNoOfTables caused the error Job buffer congestion to occur. (Bug#19378)

Some equi-joins containing a WHERE clause that included a NOT IN subquery caused a server crash. (Bug#27870)

SELECT DISTINCT could return incorrect results if the select list contained duplicated columns. (Bug#27659)

With NO_AUTO_VALUE_ON_ZERO SQL mode enabled, LOAD DATA operations could assign incorrect AUTO_INCREMENT values. (Bug#27586)

Under certain rare circumstances, DROP TABLE or TRUNCATE of an NDB table could cause a node failure or forced cluster shutdown. (Bug#27581)

Incorrect results could be returned for some queries that contained a select list expression with IN or BETWEEN together with an ORDER BY or GROUP BY on the same expression using NOT IN or NOT BETWEEN. (Bug#27532)

Evaluation of an IN() predicate containing a decimal-valued argument caused a server crash. (Bug#27513, Bug#27362, CVE-2007-2583)

In out-of-memory conditions, the server might crash or otherwise not report an error to the Windows event log. (Bug#27490)

Passing nested row expressions with different structures to an IN predicate caused a server crash. (Bug#27484)

The decimal.h header file was incorrectly omitted from binary distributions. (Bug#27456)

With innodb_file_per_table enabled, attempting to rename an InnoDB table to a non-existent database caused the server to exit. (Bug#27381)

A subquery could get incorrect values for references to outer query columns when it contained aggregate functions that were aggregated in outer context. (Bug#27321)

The server did not shut down cleanly. (Bug#27310)

In a view, a column that was defined using a GEOMETRY function was treated as having the LONGBLOB data type rather than the GEOMETRY type. (Bug#27300)

A race condition could sometimes occur if the node acting as master failed while node IDs were still being allocated during startup. (Bug#27286)

When a data node was taking over as the master node, a race condition could sometimes occur as the node was assuming responsibility for handling of global checkpoints. (Bug#27283)

Queries containing subqueries with COUNT(*) aggregated in an outer context returned incorrect results. This happened only if the subquery did not contain any references to outer columns. (Bug#27257)

Use of an aggregate function from an outer context as an argument to GROUP_CONCAT() caused a server crash. (Bug#27229)

String truncation upon insertion into an integer or year column did not generate a warning (or an error in strict mode). (Bug#27176, Bug#26359)

Storing NULL values in spatial fields caused excessive memory allocation and crashes on some systems. (Bug#27164)

Row equalities in WHERE clauses could cause memory corruption. (Bug#27154)

GROUP BY on a ucs2 column caused a server crash when there was at least one empty string in the column. (Bug#27079)

Duplicate members in SET definitions were not detected. Now they result in a warning; if strict SQL mode is enabled, an error occurs instead. (Bug#27069)

For INSERT ... ON DUPLICATE KEY UPDATE statements on tables containing AUTO_INCREMENT columns, LAST_INSERT_ID() was reset to 0 if no rows were successfully inserted or changed. “Not changed” includes the case where a row was updated to its current values, but in that case, LAST_INSERT_ID() should not be reset to 0. Now LAST_INSERT_ID() is reset to 0 only if no rows were successfully inserted or touched, whether or not touched rows were changed. (Bug#27033)

This regression was introduced by Bug#19978

mysql_install_db could terminate with an error after failing to determine that a system table already existed. (Bug#27022)

In a MEMORY table, using a BTREE index to scan for updatable rows could lead to an infinite loop. (Bug#26996)

Invalid optimization of pushdown conditions for queries where an outer join was guaranteed to read only one row from the outer table led to results with too few rows. (Bug#26963)

Windows binaries contained no debug symbol file. Now .map and .pdb files are included in 32-bit builds for mysqld-nt.exe, mysqld-debug.exe, and mysqlmanager.exe. (Bug#26893)

Out-of-memory errors for slave I/O threads were not reported. Now they are written to the error log. (Bug#26844)

Improved out-of-memory detection when sending logs from a master server to slaves, and log a message when allocation fails. (Bug#26837)

For InnoDB tables having a clustered index that began with a CHAR or VARCHAR column, deleting a record and then inserting another before the deleted record was purged could result in table corruption. (Bug#26835)

mysqld processes would sometimes crash under high load. (Bug#26825)

Duplicates were not properly identified among (potentially) long strings used as arguments for GROUP_CONCAT(DISTINCT). (Bug#26815)

ALTER VIEW requires the CREATE VIEW and DROP privileges for the view. However, if the view was created by another user, the server erroneously required the SUPER privilege. (Bug#26813)

A result set column formed by concatention of string literals was incomplete when the column was produced by a subquery in the FROM clause. (Bug#26738)

When using the result of SEC_TO_TIME() for time value greater than 24 hours in an ORDER BY clause, either directly or through a column alias, the rows were sorted incorrectly as strings. (Bug#26672)

The range optimizer could cause the server to run out of memory. (Bug#26625)

The range optimizer could consume a combinatorial amount of memory for certain classes of WHERE clauses. (Bug#26624)

mysqldump could crash or exhibit incorrect behavior when some options were given very long values, such as --fields-terminated-by="some very long string". The code has been cleaned up to remove a number of fixed-sized buffers and to be more careful about error conditions in memory allocation. (Bug#26346)

If the server was started with --skip-grant-tables, Selecting from INFORMATION_SCHEMA tables causes a server crash. (Bug#26285)

For an INSERT statement that should fail due to a column with no default value not being assigned a value, the statement succeeded with no error if the column was assigned a value in an ON DUPLICATE KEY UPDATE clause, even if that clause was not used. (Bug#26261)

The temporary file-creation code was cleaned up on Windows to improve server stability. (Bug#26233)

For MyISAM tables, COUNT(*) could return an incorrect value if the WHERE clause compared an indexed TEXT column to the empty string (''). This happened if the column contained empty strings and also strings starting with control characters such as tab or newline. (Bug#26231)

For INSERT INTO ... SELECT where index searches used column prefixes, insert errors could occur when key value type conversion was done. (Bug#26207)

For DELETE FROM tbl_name ORDER BY col_name (with no WHERE or LIMIT clause), the server did not check whether col_name was a valid column in the table. (Bug#26186)

REPAIR TABLE ... USE_FRM with an ARCHIVE table deleted all records from the table. (Bug#26138)

mysqldump crashed for MERGE tables if the --complete-insert (-c) option was given. (Bug#25993)

Setting a column to NOT NULL with an ON DELETE SET NULL clause foreign key crashes the server. (Bug#25927)

On Windows, debug builds of mysqld could fail with heap assertions. (Bug#25765)

In certain situations, MATCH ... AGAINST returned false hits for NULL values produced by LEFT JOIN when no full-text index was available. (Bug#25729)

When RAND() was called multiple times inside a stored procedure, the server did not write the correct random seed values to the binary log, resulting in incorrect replication. (Bug#25543)

OPTIMIZE TABLE might fail on Windows when it attempts to rename a temporary file to the original name if the original file had been opened, resulting in loss of the .MYD file. (Bug#25521)

For SHOW ENGINE INNODB STATUS, the LATEST DEADLOCK INFORMATION was not always cleared properly. (Bug#25494)

mysql_stmt_fetch() did an invalid memory deallocation when used with the embedded server. (Bug#25492)

GRANT statements were not replicated if the server was started with the --replicate-ignore-table or --replicate-wild-ignore-table option. (Bug#25482)

Difficult repair or optimization operations could cause an assertion failure, resulting in a server crash. (Bug#25289)

Duplicate entries were not assessed correctly in a MEMORY table with a BTREE primary key on a utf8 ENUM column. (Bug#24985)

Selecting the result of AVG() within a UNION could produce incorrect values. (Bug#24791)

MBROverlaps() returned incorrect values in some cases. (Bug#24563)

Increasing the width of a DECIMAL column could cause column values to be changed. (Bug#24558)

A problem in handling of aggregate functions in subqueries caused predicates containing aggregate functions to be ignored during query execution. (Bug#24484)

The test for the MYSQL_OPT_SSL_VERIFY_SERVER_CERT option for mysql_options() was performed incorrectly. Also changed as a result of this bugfix: The arg option for the mysql_options() C API function was changed from char * to void *. (Bug#24121)

Replication between master and slave would infinitely retry binary log transmission where the max_allowed_packet on the master was larger than that on the slave if the size of the transfer was between these two values. (Bug#23775)

On Windows, debug builds of mysqlbinlog could fail with a memory error. (Bug#23736)

The values displayed for the Innodb_row_lock_time, Innodb_row_lock_time_avg, and Innodb_row_lock_time_max status variables were incorrect. (Bug#23666)

SHOW CREATE VIEW qualified references to stored functions in the view definition with the function's database name, even when the database was the default database. This affected mysqldump (which uses SHOW CREATE VIEW to dump views) because the resulting dump file could not be used to reload the database into a different database. SHOW CREATE VIEW now suppresses the database name for references to functions in the default database. (Bug#23491)

An INTO OUTFILE clause is allowed only for the final SELECT of a UNION, but this restriction was not being enforced correctly. (Bug#23345)

With the NO_AUTO_VALUE_ON_ZERO SQL mode enabled, LAST_INSERT_ID() could return 0 after INSERT ... ON DUPLICATE KEY UPDATE. Additionally, the next rows inserted (by the same INSERT, or the following INSERT with or without ON DUPLICATE KEY UPDATE), would insert 0 for the auto-generated value if the value for the AUTO_INCREMENT column was NULL or missing. (Bug#23233)

SOUNDEX() returned an invalid string for international characters in multi-byte character sets. (Bug#22638)

COUNT(decimal_expr) sometimes generated a spurious truncation warning. (Bug#21976)

For InnoDB, fixed consistent-read behavior of the first read statement, if the read was served from the query cache, for the READ COMMITTED isolation level. (Bug#21409)

For a stored procedure containing a SELECT statement that used a complicated join with an ON expression, the expression could be ignored during re-execution of the procedure, yielding an incorrect result. (Bug#20492)

In some cases, the optimizer preferred a range or full index scan access method over lookup access methods when the latter were much cheaper. (Bug#19372)

When trying to create tables on an SQL node not connected to the cluster, a misleading error message Table 'tbl_name' already exists was generated. The error now generated is Could not connect to storage engine. (Bug#18676)

Conversion of DATETIME values in numeric contexts sometimes did not produce a double (YYYYMMDDHHMMSS.uuuuuu) value. (Bug#16546)

The server now includes a timestamp in error messages that are logged as a result of unhandled signals (such as mysqld got signal 11 messages). (Bug#24878)

Added the --secure-file-priv option for mysqld, which limits the effect of the LOAD_FILE() function and the LOAD DATA and SELECT ... INTO OUTFILE statements to work only with files in a given directory. (Bug#18628)

Added the hostname system variable, which the server sets at startup to the server hostname.

To satisfy different user requirements, we provide several servers. mysqld is an optimized server that is a smaller, faster binary. Each package now also includes mysqld-debug, which is compiled with debugging support but is otherwise configured identically to the non-debug server.

Incompatible Change: INSERT DELAYED statements are not supported for MERGE tables, but the MERGE storage engine was not rejecting such statements, resulting in table corruption. Applications previously using INSERT DELAYED into MERGE table will break when upgrading to versions with this fix. To avoid the problem, remove DELAYED from such statements. (Bug#26464)

MySQL Cluster: An inadvertent use of unaligned data caused ndb_restore to fail on some 64-bit platforms, including Sparc and Itanium-2. (Bug#26739)

MySQL Cluster: An invalid pointer was returned following a FSCLOSECONF signal when accessing the REDO logs during a node restart or system restart. (Bug#26515)

MySQL Cluster: The failure of a data node when restarting it with --initial could lead to failures of subsequent data node restarts. (Bug#26481)

MySQL Cluster: Takeover for local checkpointing due to multiple failures of master nodes was sometimes incorrect handled. (Bug#26457)

MySQL Cluster: The LockPagesInMemory parameter was not read until after distributed communication had already started between cluster nodes. When the value of this parameter was 1, this could sometimes result in data node failure due to missed heartbeats. (Bug#26454)

MySQL Cluster: Under some circumstances, following the restart of a management, all cluster data nodes would connect to it normally, but some of them subsequently failed to log any events to the management node. (Bug#26293)

MySQL Cluster: An error was produced when SHOW TABLE STATUS was used on an NDB table that had no AUTO_INCREMENT column. (Bug#21033)

SELECT ... INTO OUTFILE with a long FIELDS ENCLOSED BY value could crash the server. (Bug#27231)

An INSERT ... ON DUPLICATE KEY UPDATE statement might modify values in a table but not flush affected data from the query cache, causing subsequent selects to return stale results. This made the combination of query cache plus ON DUPLICATE KEY UPDATE very unreliable. (Bug#27006, Bug#27210)

This regression was introduced by Bug#19978

For MERGE tables defined on underlying tables that contained a short VARCHAR column (shorter than four characters), using ALTER TABLE on at least one but not all of the underlying tables caused the table definitions to be considered different from that of the MERGE table, even if the ALTER TABLE did not change the definition. (Bug#26881)

Use of a subquery containing GROUP BY and WITH ROLLUP caused a server crash. (Bug#26830)

Added support for --debugger=dbx for mysql-test-run.pl and fixed support for --debugger=devenv, --debugger=DevEnv, and --debugger=/path/to/devenv. (Bug#26792)

An infinite loop in an internal logging function could cause trace logs to fill up with Unknown Signal type error messages and thus grow to unreasonable sizes. (Bug#26720)

SSL connections failed on Windows. (Bug#26678)

Use of a subquery containing a UNION with an invalid ORDER BY clause caused a server crash. (Bug#26661)

In some error messages, inconsistent format specifiers were used for the translations in different languages. comp_err (the error message compiler) now checks for mismatches. (Bug#26571)

Views that used a scalar correlated subquery returned incorrect results. (Bug#26560)

UNHEX() IS NULL comparisons failed when UNHEX() returned NULL. (Bug#26537)

On 64-bit Windows, large timestamp values could be handled incorrectly. (Bug#26536)

For some values of the position argument, the INSERT() function could insert a NUL byte into the result. (Bug#26281)

INSERT DELAYED statements inserted incorrect values into BIT columns. (Bug#26238)

A multiple-row delayed insert with an auto-increment column could cause duplicate entries to be created on the slave in a replication environment. (Bug#26116, Bug#25507)

BENCHMARK() did not work correctly for expressions that produced a DECIMAL result. (Bug#26093)

LOAD DATA INFILE sent an okay to the client before writing the binary log and committing the changes to the table had finished, thus violating ACID requirements. (Bug#26050)

X() IS NULL and Y() IS NULL comparisons failed when X() and Y() returned NULL. (Bug#26038)

Indexes on TEXT columns were ignored when ref accesses were evaluated. (Bug#25971)

If a thread previously serviced a connection that was killed, excessive memory and CPU use by the thread occurred if it later serviced a connection that had to wait for a table lock. (Bug#25966)

VIEW restrictions were applied to SELECT statements after a CREATE VIEW statement failed, as though the CREATE had succeeded. (Bug#25897)

Several deficiencies in resolution of column names for INSERT ... SELECT statements were corrected. (Bug#25831)

Inserting utf8 data into a TEXT column that used a single-byte character set could result in spurious warnings about truncated data. (Bug#25815)

In certain cases it could happen that deleting a row corrupted an RTREE index. This affected indexes on spatial columns. (Bug#25673)

Expressions involving SUM(), when used in an ORDER BY clause, could lead to out-of-order results. (Bug#25376)

Use of a GROUP BY clause that referred to a stored function result together with WITH ROLLUP caused incorrect results. (Bug#25373)

A stored procedure that made use of cursors failed when the procedure was invoked from a stored function. (Bug#25345)

On Windows, the server exhibited a file-handle leak after reaching the limit on the number of open file descriptors. (Bug#25222)

The REPEAT() function did not allow a column name as the count parameter. (Bug#25197)

Duplicating the usage of a user variable in a stored procedure or trigger would not be replicated correctly to the slave. (Bug#25167)

A reference to a non-existent column in the ORDER BY clause of an UPDATE ... ORDER BY statement could cause a server crash. (Bug#25126)

A view on a join is insertable for INSERT statements that store values into only one table of the join. However, inserts were being rejected if the inserted-into table was used in a self-join because MySQL incorrectly was considering the insert to modify multiple tables of the view. (Bug#25122)

MySQL would not compile when configured using --without-query-cache. (Bug#25075)

IF(expr, unsigned_expr, unsigned_expr) was evaluated to a signed result, not unsigned. This has been corrected. The fix also affects constructs of the form IS [NOT] {TRUE|FALSE}, which were transformed internally into IF() expressions that evaluated to a signed result.

For existing views that were defined using IS [NOT] {TRUE|FALSE} constructs, there is a related implication. The definitions of such views were stored using the IF() expression, not the original construct. This is manifest in that SHOW CREATE VIEW shows the transformed IF() expression, not the original one. Existing views will evaluate correctly after the fix, but if you want SHOW CREATE VIEW to display the original construct, you must drop the view and re-create it using its original definition. New views will retain the construct in their definition. (Bug#24532)

DROP TRIGGER statements would not be filtered on the slave when using the replication-wild-do-table option. (Bug#24478)

For INSERT ... ON DUPLICATE KEY UPDATE statements where some AUTO_INCREMENT values were generated automatically for inserts and some rows were updated, one auto-generated value was lost per updated row, leading to faster exhaustion of the range of the AUTO_INCREMENT column.

Because the original problem can affect replication (different values on master and slave), it is recommended that the master and its slaves be upgraded to the current version. (Bug#24432)

Queries that used a temporary table for the outer query when evaluating a correlated subquery could return incorrect results. (Bug#23800)

DOUBLE values such as 20070202191048.000000 were being treated as illegal arguments by WEEK(). (Bug#23616)

The server could crash if two or more threads initiated query cache resize operation at moments very close in time. (Bug#23527)

NOW() returned the wrong value in statements executed at server startup with the --init-file option. (Bug#23240)

When nesting stored procedures within a trigger on a table, a false dependency error was thrown when one of the nested procedures contained a DROP TABLE statement. (Bug#22580)

Instance Manager did not remove the angel PID file on a clean shutdown. (Bug#22511)

EXPLAIN EXTENDED did not show WHERE conditions that were optimized away. (Bug#22331)

IN ((subquery)), IN (((subquery))), and so forth, are equivalent to IN (subquery), which is always interpreted as a table subquery (so that it is allowed to return more than one row). MySQL was treating the “over-parenthesized” subquery as a single-row subquery and rejecting it if it returned more than one row. This bug primarily affected automatically generated code (such as queries generated by Hibernate), because humans rarely write the over-parenthesized forms. (Bug#21904)

An INSERT trigger invoking a stored routine that inserted into a table other than the one on which the trigger was defined would fail with a Table '...' doesn't exist referring to the second table when attempting to delete records from the first table. (Bug#21825)

When a stored routine attempted to execute a statement accessing a nonexistent table, the error was not caught by the routine's exception handler. (Bug#20713, Bug#8407)

The conditions checked by the optimizer to allow use of indexes in IN predicate calculations were unnecessarily tight and were relaxed. (Bug#20420)

When a TIME_FORMAT() expression was used as a column in a GROUP BY clause, the expression result was truncated. (Bug#20293)

When using certain server SQL modes, the mysql.proc table was not created by mysql_install_db. In addition, the creation of this and other MySQL system tables was not checked for by mysql-test-run.pl. (Bug#20166, Bug#23669)

For index reads, the BLACKHOLE engine did not return end-of-file (which it must because BLACKHOLE tables contain no rows), causing some queries to crash. (Bug#19717)

For expr IN(value_list), the result could be incorrect if BIGINT UNSIGNED values were used for expr or in the value list. (Bug#19342)

When attempting to call a stored procedure creating a table from a trigger on a table tbl in a database db, the trigger failed with ERROR 1146 (42S02): Table 'db.tbl' doesn't exist. However, the actual reason that such a trigger fails is due to the fact that CREATE TABLE causes an implicit COMMIT, and so a trigger cannot invoke a stored routine containing this statement. A trigger which does so now fails with ERROR 1422 (HY000): Explicit or implicit commit is not allowed in stored function or trigger, which makes clear the reason for the trigger's failure. (Bug#18914)

A user-defined variable could be assigned an incorrect value if a temporary table was employed in obtaining the result of the query used to determine its value. (Bug#16861)

The update columns for INSERT ... SELECT ... ON DUPLICATE KEY UPDATE could be assigned incorrect values if a temporary table was used to evaluate the SELECT. (Bug#16630)

For SUBSTRING() evaluation using a temporary table, when SUBSTRING() was used on a LONGTEXT column, the max_length metadata value of the result was incorrectly calculated and set to 0. Consequently, an empty string was returned instead of the correct result. (Bug#15757)

Loading data using LOAD DATA INFILE may not replicate correctly (due to character set incompatibilities) if the character_set_database variable is set before the data is loaded. (Bug#15126)

User defined variables used within stored procedures and triggers are not replicated correctly when operating in statement-based replication mode. (Bug#14914, Bug#20141)

Local variables in stored routines or triggers, when declared as the BIT type, were interpreted as strings. (Bug#12976)

CONNECTION is no longer treated as a reserved word. (Bug#12204)

SELECT ... INTO OUTFILE with a long FIELDS ENCLOSED BY value could crash the server. (Bug#27231)

For MERGE tables defined on underlying tables that contained a short VARCHAR column (shorter than four characters), using ALTER TABLE on at least one but not all of the underlying tables caused the table definitions to be considered different from that of the MERGE table, even if the ALTER TABLE did not change the definition. (Bug#26881)

Incompatible Change: Previously, the DATE_FORMAT() function returned a binary string. Now it returns a string with a character set and collation given by character_set_connection and collation_connection so that it can return month and weekday names containing non-ASCII characters. (Bug#22646)

MySQL Cluster: The LockPagesInMainMemory configuration parameter has changed its type and possible values. For more information, see LockPagesInMainMemory .

(Bug#25686)

The localhost anonymous user account created during MySQL installation on Windows now has no global privileges. Formerly this account had all global privileges. For operations that require global privileges, the root account can be used instead. (Bug#24496)

The bundled yaSSL library was upgraded to version 1.5.8.

Security Fix: Using an INFORMATION_SCHEMA table with ORDER BY in a subquery could cause a server crash. We would like to thank Oren Isacson from Flowgate Security Consulting as well as well as Stefan Streichsbier from SEC Consult for informing us about this problem. (Bug#24630, Bug#26556, CVE-2007-1420)

Incompatible Change: For ENUM columns that had enumeration values containing commas, the commas were mapped to 0xff internally. However, this rendered the commas indistinguishable from true 0xff characters in the values. This no longer occurs. However, the fix requires that you dump and reload any tables that have ENUM columns containing true 0xff in their values: Dump the tables using mysqldump with the current server before upgrading from a version of MySQL 5.0 older than 5.0.36 to version 5.0.36 or newer. (Bug#24660)

MySQL Cluster: A query with an IN clause against an NDB table employing explicit user-defined partitioning did not always return all matching rows. (Bug#25821)

MySQL Cluster: It was not possible to create an NDB table with a key on two VARCHAR columns where both columns had a storage length in excess of 256. (Bug#25746)

MySQL Cluster: In some circumstances, shutting down the cluster could cause connected mysqld processes to crash. (Bug#25668)

MySQL Cluster: Memory allocations for TEXT columns were calculated incorrectly, resulting in space being wasted and other issues. (Bug#25562)

MySQL Cluster: The failure of a master node during a node restart could lead to a resource leak, causing later node failures. (Bug#25554)

MySQL Cluster: An UPDATE using an IN clause on an NDB table on which there was a trigger caused mysqld to crash. (Bug#25522)

MySQL Cluster: (Cluster APIs): Deletion of an Ndb_cluster_connection object took a very long time. (Bug#25487)

MySQL Cluster: A node shutdown occurred if the master failed during a commit. (Bug#25364)

MySQL Cluster: Creating a non-unique index with the USING HASH clause silently created an ordered index instead of issuing a warning. (Bug#24820)

MySQL Cluster: The ndb_size.tmpl file (necessary for using the ndb_size.pl script) was missing from binary distributions. (Bug#24191)

MySQL Cluster: The management server did not handle logging of node shutdown events correctly in certain cases. (Bug#22013)

MySQL Cluster: SELECT statements with a BLOB or TEXT column in the selected column list and a WHERE condition including a primary key lookup on a VARCHAR primary key produced empty result sets. (Bug#19956)

MySQL Cluster: (Cluster APIs): libndbclient.so was not versioned. (Bug#13522)

Using ORDER BY or GROUP BY could yield different results when selecting from a view and selecting from the underlying table. (Bug#26209)

DISTINCT queries that were executed using a loose scan for an InnoDB table that had been emptied caused a server crash. (Bug#26159)

A WHERE clause that used BETWEEN for DATETIME values could be treated differently for a SELECT and a view defined as that SELECT. (Bug#26124)

Collation for LEFT JOIN comparisons could be evaluated incorrectly, leading to improper query results. (Bug#26017)

The WITH CHECK OPTION clause for views was ignored for updates of multiple-table views when the updates could not be performed on fly and the rows to update had to be put into temporary tables first. (Bug#25931)

LOAD DATA INFILE did not work with pipes. (Bug#25807)

The SEC_TO_TIME() and QUARTER() functions sometimes did not handle NULL values correctly. (Bug#25643)

The InnoDB parser sometimes did not account for null bytes, causing spurious failure of some queries. (Bug#25596)

View definitions that used the ! operator were treated as containing the NOT operator, which has a different precedence and can produce different results. . (Bug#25580)

An error in the name resolution of nested JOIN ... USING constructs was corrected. (Bug#25575)

GROUP BY and DISTINCT did not group NULL values for columns that have a UNIQUE index. . (Bug#25551)

The --with-readline option for configure does not work for commercial source packages, but no error message was printed to that effect. Now a message is printed. (Bug#25530)

A yaSSL program named test was installed, causing conflicts with the test system utility. It is no longer installed. (Bug#25417)

For a UNIQUE index containing many NULL values, the optimizer would prefer the index for col IS NULL conditions over other more selective indexes. . (Bug#25407)

An AFTER UPDATE trigger on an InnoDB table with a composite primary key caused the server to crash. (Bug#25398)

Passing a NULL value to a user-defined function from within a stored procedure crashes the server. (Bug#25382)

perror crashed on some platforms due to failure to handle a NULL pointer. (Bug#25344)

mysql.server stop timed out too quickly (35 seconds) waiting for the server to exit. Now it waits up to 15 minutes, to ensure that the server exits. (Bug#25341)

A query that contained an EXIST subquery with a UNION over correlated and uncorrelated SELECT queries could cause the server to crash. (Bug#25219)

mysql_kill() caused a server crash when used on an SSL connection. (Bug#25203)

yaSSL was sensitive to the presence of whitespace at the ends of lines in PEM-encoded certificates, causing a server crash. (Bug#25189)

A query with ORDER BY and GROUP BY clauses where the ORDER BY clause had more elements than the GROUP BY clause caused a memory overrun leading to a crash of the server. (Bug#25172)

Use of ON DUPLICATE KEY UPDATE defeated the usual restriction against inserting into a join-based view unless only one of the underlying tables is used. (Bug#25123)

ALTER TABLE ... ENABLE KEYS acquired a global lock, preventing concurrent execution of other statements that use tables. . (Bug#25044)

A return value of -1 from user-defined handlers was not handled well and could result in conflicts with server code. (Bug#24987)

Accessing a fixed record format table with a crashed key definition results in server/myisamchk segmentation fault. (Bug#24855)

mysqld_multi and mysqlaccess looked for option files in /etc even if the --sysconfdir option for configure had been given to specify a different directory. (Bug#24780)

If there was insufficient memory available to mysqld, this could sometimes cause the server to hang during startup. (Bug#24751)

If an ORDER BY or GROUP BY list included a constant expression being optimized away and, at the same time, containing single-row subselects that return more that one row, no error was reported. If a query requires sorting by expressions containing single-row subselects that return more than one row, execution of the query may cause a server crash. (Bug#24653)

For ALTER TABLE, using ORDER BY expression could cause a server crash. Now the ORDER BY clause allows only column names to be specified as sort criteria (which was the only documented syntax, anyway). (Bug#24562)

A workaround was implemented to avoid a race condition in the NPTL pthread_exit() implementation. (Bug#24507)

mysqltest crashed with a stack overflow. (Bug#24498)

Within stored routines or prepared statements, inconsistent results occurred with multiple use of INSERT ... SELECT ... ON DUPLICATE KEY UPDATE when the ON DUPLICATE KEY UPDATE clause erroneously tried to assign a value to a column mentioned only in its SELECT part. (Bug#24491)

Expressions of the form (a, b) IN (SELECT a, MIN(b) FROM t GROUP BY a) could produce incorrect results when column a of table t contained NULL values while column b did not. (Bug#24420)

If a prepared statement accessed a view, access to the tables listed in the query after that view was checked in the security context of the view. (Bug#24404)

Attempts to access a MyISAM table with a corrupt column definition caused a server crash. (Bug#24401)

When opening a corrupted .frm file during a query, the server crashes. (Bug#24358)

A query using WHERE unsigned_column NOT IN ('negative_value') could cause the server to crash. (Bug#24261)

When SET PASSWORD was written to the binary log double quotes were included in the statement. If the slave was running in with the sql_mode set to ANSI_QUOTES the event would fail and halt the replication process. (Bug#24158)

SSL connections could hang at connection shutdown. (Bug#24148)

Expressions of the form (a, b) IN (SELECT c, d ...) could produce incorrect results if a, b, or both were NULL. (Bug#24127)

A FETCH statement using a cursor on a table which was not in the table cache could sometimes cause the server to crash. (Bug#24117)

Queries that evaluate NULL IN (SELECT ... UNION SELECT ...) could produce an incorrect result (FALSE instead of NULL). (Bug#24085)

Hebrew-to-Unicode conversion failed for some characters. Definitions for the following Hebrew characters (as specified by the ISO/IEC 8859-8:1999) were added: LEFT-TO-RIGHT MARK (LRM), RIGHT-TO-LEFT MARK (RLM) (Bug#24037)

Some UPDATE statements were slower than in previous versions when the search key could not be converted to a valid value for the type of the search column. (Bug#24035)

ISNULL(DATE(NULL)) and ISNULL(CAST(NULL AS DATE)) erroneously returned false. (Bug#23938)

Within a stored routine, accessing a declared routine variable with PROCEDURE ANALYSE() caused a server crash. (Bug#23782)

When reading from the standard input on Windows, mysqlbinlog opened the input in text mode rather than binary mode and consequently misinterpreted some characters such as Control-Z. (Bug#23735)

A stored procedure, executed from a connection using a binary character set, and which wrote multibyte data, would write incorrectly escaped entries to the binary log. This caused syntax errors, and caused replication to fail. (Bug#23619, Bug#24492)

For an InnoDB table with any ON DELETE trigger, TRUNCATE TABLE mapped to DELETE and activated triggers. Now a fast truncation occurs and triggers are not activated. . (Bug#23556)

The row count for MyISAM tables was not updated properly, causing SHOW TABLE STATUS to report incorrect values. (Bug#23526)

With ONLY_FULL_GROUP_BY enables, the server was too strict: Some expressions involving only aggregate values were rejected as non-aggregate (for example, MAX(a) - MIN(a)). (Bug#23417)

The arguments of the ENCODE() and the DECODE() functions were not printed correctly, causing problems in the output of EXPLAIN EXTENDED and in view definitions. (Bug#23409)

Some queries against INFORMATION_SCHEMA that used subqueries failed. . (Bug#23299)

readline detection did not work correctly on NetBSD. (Bug#23293)

If there was insufficient memory to store or update a blob record in a MyISAM table then the table will marked as crashed. (Bug#23196)

LAST_INSERT_ID() was not reset to 0 if INSERT ... SELECT inserted no rows. (Bug#23170)

The number of setsockopt() calls performed for reads and writes to the network socket was reduced to decrease system call overhead. (Bug#22943)

mysql_upgrade failed when called with a basedir pathname containing spaces. (Bug#22801)

SET lc_time_names = value allowed only exact literal values, not expression values. (Bug#22647)

Changes to the lc_time_names system variable were not replicated. (Bug#22645)

The STDDEV() function returned a positive value for data sets consisting of a single value. (Bug#22555)

Storing values specified as hexadecimal values 64 or more bits long into BIT(64), BIGINT, or BIGINT UNSIGNED columns did not raise any warning or error if the value was out of range. (Bug#22533)

SHOW COLUMNS reported some NOT NULL columns as NULL. (Bug#22377)

Type conversion errors during formation of index search conditions were not correctly checked, leading to incorrect query results. (Bug#22344)

Re-execution of CREATE DATABASE, CREATE TABLE, and ALTER TABLE statements in stored routines or as prepared statements caused incorrect results or crashes. (Bug#22060)

The code for generating USE statements for binary logging of CREATE PROCEDURE statements resulted in confusing output from mysqlbinlog for DROP PROCEDURE statements. (Bug#22043)

For the IF() and COALESCE() function and CASE expressions, large unsigned integer values could be mishandled and result in warnings. (Bug#22026)

When updating a table that used a JOIN of the table itself (for example, when building trees) and the table was modified on one side of the expression, the table would either be reported as crashed or the wrong rows in the table would be updated. (Bug#21310)

Inserting DEFAULT into a column with no default value could result in garbage in the column. Now the same result occurs as when inserting NULL into a NOT NULL column. (Bug#20691)

A stored routine containing semicolon in its body could not be reloaded from a dump of a binary log. (Bug#20396)

SELECT ... FOR UPDATE, SELECT ... LOCK IN SHARE MODE, DELETE, and UPDATE statements executed using a full table scan were not releasing locks on rows that did not satisfy the WHERE condition. (Bug#20390)

On Windows, if the server was installed as a service, it did not auto-detect the location of the data directory. (Bug#20376)

The BUILD/check-cpu script did not recognize Celeron processors. (Bug#20061)

If the duplicate key value was present in the table, INSERT ... ON DUPLICATE KEY UPDATE reported a row count indicating that a record was updated, even when no record actually changed due to the old and new values being the same. Now it reports a row count of zero. (Bug#19978)

For SET, SELECT, and DO statements that invoked a stored function from a database other than the default database, the function invocation could fail to be replicated. (Bug#19725)

ORDER BY on DOUBLE values could change the set of rows returned by a query. (Bug#19690)

The readline library wrote to uninitialized memory, causing mysql to crash. (Bug#19474)

mysqltest incorrectly tried to retrieve result sets for some queries where no result set was available. (Bug#19410)

Use of already freed memory caused SSL connections to hang forever. (Bug#19209)

The server might fail to use an appropriate index for DELETE when ORDER BY, LIMIT, and a non-restricting WHERE are present. (Bug#17711)

No warning was issued for use of the DATA DIRECTORY or INDEX DIRECTORY table options on a platform that does not support them. (Bug#17498)

When a prepared statement failed during the prepare operation, the error code was not cleared when it was reused, even if the subsequent use was successful. (Bug#15518)

On Windows, the SLEEP() function could sleep too long, especially after a change to the system clock. (Bug#14094, Bug#24686, Bug#17635)

mysqldump --order-by-primary failed if the primary key name was an identifier that required quoting. (Bug#13926)

To enable installation of MySQL RPMs on Linux systems running RHEL 4 (which includes SE-Linux) additional information was provided to specify some actions that are allowed to the MySQL binaries. (Bug#12676)

The presence of ORDER BY in a view definition prevented the MERGE algorithm from being used to resolve the view even if nothing else in the definition required the TEMPTABLE algorithm. (Bug#12122)

If a slave server closed its relay log (for example, due to an error during log rotation), the I/O thread did not recognize this and still tried to write to the log, causing a server crash. (Bug#10798)

The --skip-thread-priority option now is enabled by default for binary Mac OS X distributions. Use of thread priorities degrades performance on Mac OS X. (Bug#18526)

Added the --disable-grant-options option to configure. If configure is run with this option, the --bootstrap, --skip-grant-tables, and --init-file options for mysqld are disabled and cannot be used. For Windows, the configure.js script recognizes the DISABLE_GRANT_OPTIONS flag, which has the same effect.

MySQL Cluster: Hosts in clusters with a large number of nodes could experience excessive CPU usage while obtaining configuration data. (Bug#25711)

MySQL Cluster: (NDB API): Invoking the NdbTransaction::execute() method using execution type Commit and abort option AO_IgnoreError could lead to a crash of the transaction coordinator (DBTC). (Bug#25090)

MySQL Cluster: (NDB API): A unique index lookup on a non-existent tuple could lead to a data node timeout (error 4012). (Bug#25059)

Referencing an ambiguous column alias in an expression in the ORDER BY clause of a query caused the server to crash. (Bug#25427)

Using a view in combination with a USING clause caused column aliases to be ignored. (Bug#25106)

A multiple-table DELETE QUICK could sometimes cause one of the affected tables to become corrupted. (Bug#25048)

An assertion failed incorrectly for prepared statements that contained a single-row uncorrelated subquery that was used as an argument of the IS NULL predicate. (Bug#25027)

Optimizations that are legal only for subqueries without tables and WHERE conditions were applied for any subquery without tables. (Bug#24670)

Some joins in which one of the joined tables was a view could return erroneous results or crash the server. (Bug#24345)

A view was not handled correctly if the SELECT part contained “ \Z ”. (Bug#24293)

The server was built even when configure was run with the --without-server option. (Bug#23973)

OPTIMIZE TABLE tried to sort R-tree indexes such as spatial indexes, although this is not possible (see Section 12.5.2.5, “OPTIMIZE TABLE Syntax”). (Bug#23578)

User-defined variables could consume excess memory, leading to a crash caused by the exhaustion of resources available to the MEMORY storage engine, due to the fact that this engine is used by MySQL for variable storage and intermediate results of GROUP BY queries. Where SET had been used, such a condition could instead give rise to the misleading error message You may only use constant expressions with SET, rather than Out of memory (Needed NNNNNN bytes). (Bug#23443)

A table created with the ROW_FORMAT = FIXED table option loses the option if an index is added or dropped with CREATE INDEX or DROP INDEX. (Bug#23404)

A deadlock could occur, with the server hanging on Closing tables, with a sufficient number of concurrent INSERT DELAYED, FLUSH TABLES, and ALTER TABLE operations. (Bug#23312)

A compressed MyISAM table that became corrupted could crash myisamchk and possibly the MySQL Server. (Bug#23139)

When a data node was shut down using the management client STOP command, a connection event (NDB_LE_Connected) was logged instead of a disconnection event (NDB_LE_Disconnected). (Bug#22773)

Changing the value of MI_KEY_BLOCK_LENGTH in myisam.h and recompiling MySQL resulted in a myisamchk that saw existing MyISAM tables as corrupt. (Bug#22119)

A crash of the MySQL Server could occur when unpacking a BLOB column from a row in a corrupted MyISAM table. This could happen when trying to repair a table using either REPAIR TABLE or myisamchk; it could also happen when trying to access such a “broken” row using statements like SELECT if the table was not marked as crashed. (Bug#22053)

The FEDERATED storage engine did not support the euckr character set. (Bug#21556)

mysqld_error.h was not installed when only the client libraries were built. (Bug#21265)

InnoDB: During a restart of the MySQL Server that followed the creation of a temporary table using the InnoDB storage engine, MySQL failed to clean up in such a way that InnoDB still attempted to find the files associated with such tables. (Bug#20867)

Some CASE statements inside stored routines could lead to excessive resource usage or a crash of the server. (Bug#19194, Bug#24854)

Instance Manager could crash during shutdown. (Bug#19044)

The FEDERATED storage engine did not support the utf8 character set. (Bug#17044)

A user-defined variable could be assigned an incorrect value if a temporary table was employed in obtaining the result of the query used to determine its value. (Bug#16861)

The optimizer removes expressions from GROUP BY and DISTINCT clauses if they happen to participate in expression = constant predicates of the WHERE clause, the idea being that, if the expression is equal to a constant, then it cannot take on multiple values. However, for predicates where the expression and the constant item are of different result types (for example, when a string column is compared to 0), this is not valid, and can lead to invalid results in such cases. The optimizer now performs an additional check of the result types of the expression and the constant; if their types differ, then the expression is not removed from the GROUP BY list. (Bug#15881)

Dropping a user-defined function sometimes did not remove the UDF entry from the mysql.proc table. (Bug#15439)

Inserting a row into a table without specifying a value for a BINARY(N) NOT NULL column caused the column to be set to spaces, not zeroes. (Bug#14171)

Incompatible Change: In MySQL 5.0.13 and up, InnoDB rolls back only the last statement on a transaction timeout. A new option, --innodb_rollback_on_timeout, causes InnoDB to abort and roll back the entire transaction if a transaction timeout occurs (the same behavior as before MySQL 5.0.13). (Bug#24200)

Incompatible Change: The prepared_stmt_count system variable has been converted to the Prepared_stmt_count global status variable (viewable with the SHOW GLOBAL STATUS statement). (Bug#23159)

MySQL Cluster: Setting the configuration parameter LockPagesInMainMemory had no effect. (Bug#24461)

MySQL Cluster: It is now possible to create a unique hashed index on a column that is not defined as NOT NULL. Note that this change applies only to tables using the NDB storage engine.

Unique indexes on columns in NDB tables do not store null values because they are mapped to primary keys in an internal index table (and primary keys cannot contain nulls).

Normally, an additional ordered index is created when one creates unique indexes on NDB table columns; this can be used to search for NULL values. However, if USING HASH is specified when such an index is created, no ordered index is created.

The reason for permitting unique hash indexes with null values is that, in some cases, the user wants to save space if a large number of records are pre-allocated but not fully initialized. This also assumes that the user will not try to search for null values. Since MySQL does not support indexes that are not allowed to be searched in some cases, the NDB storage engine uses a full table scan with pushed conditions for the referenced index columns to return the correct result.

Note that a warning is returned if one creates a unique nullable hash index, since the query optimizer should be provided a hint not to use it with NULL values if this can be avoided. (Bug#21507)

DROP TRIGGER now supports an IF EXISTS clause. (Bug#23703)

The Com_create_user status variable was added (for counting CREATE USER statements). (Bug#22958)

The --memlock option relies on system calls that are unreliable on some operating systems. If a crash occurs, the server now checks whether --memlock was specified and if so issues some information about possible workarounds. (Bug#22860)

The bundled yaSSL library was upgraded to version 1.5.0.

MySQL Cluster: The failure of a data node failure during a schema operation could lead to additional node failures. (Bug#24752)

MySQL Cluster: A committed read could be attempted before a data node had time to connect, causing a timeout error. (Bug#24717)

MySQL Cluster: (Cluster APIs): Using BIT values with any of the comparison methods of the NdbScanFilter class caused the cluster's data nodes to fail. (Bug#24503)

MySQL Cluster: Sudden disconnection of an SQL or data node could lead to shutdown of data nodes with the error failed ndbrequire. (Bug#24447)

MySQL Cluster: (Cluster APIs): Some MGM API function calls could yield incorrect return values in certain cases where the cluster was operating under a very high load, or experienced timeouts in inter-node communications. (Bug#24011)

MySQL Cluster: ndb_config failed when trying to use 2 management servers and node IDs. (Bug#23887)

MySQL Cluster: If the value set for MaxNoOfAttributes is excessive, a suitable error message is now returned. (Bug#19352)

MySQL Cluster: A unique constraint violation was not ignored by an UPDATE IGNORE statement when the constraint violation occurred on a non-primary key. (Bug#18487, Bug#24303)

The REPEAT() function could return NULL when passed a column for the count argument. (Bug#24947)

mysql_upgrade failed if the --password (or -p) option was given. (Bug#24896)

With innodb_file_per_table enabled, InnoDB displayed incorrect file times in the output from SHOW TABLE STATUS. (Bug#24712)

ALTER ENABLE KEYS or ALTER TABLE DISABLE KEYS combined with another ALTER TABLE option other than RENAME TO did nothing. In addition, if ALTER TABLE was used on a table having disabled keys, the keys of the resulting table were enabled. (Bug#24395)

The InnoDB mutex structure was simplified to reduce memory load. (Bug#24386)

The --extern option for mysql-test-run.pl did not function correctly. (Bug#24354)

Foreign key identifiers for InnoDB tables could not contain certain characters. (Bug#24299)

The mysql.server script used the source command, which is less portable than the . command; it now uses . instead. (Bug#24294)

The loose index scan optimization for GROUP BY with MIN or MAX was not applied within other queries, such as CREATE TABLE ... SELECT ..., INSERT ... SELECT ..., or in the FROM clauses of subqueries. (Bug#24156)

ALTER TABLE statements that performed both RENAME TO and {ENABLE|DISABLE} KEYS operations caused a server crash. (Bug#24089)

Subqueries for which a pushed-down condition did not produce exactly one key field could cause a server crash. (Bug#24056)

The size of MEMORY tables and internal temporary tables was limited to 4GB on 64-bit Windows systems. (Bug#24052)

ROW_COUNT() did not work properly as an argument to a stored procedure. (Bug#23760)

LAST_DAY('0000-00-00') could cause a server crash. (Bug#23653)

A trigger that invoked a stored function could cause a server crash when activated by different client connections. (Bug#23651)

The stack size for NetWare binaries was increased to 128KB to prevent problems caused by insufficient stack size. (Bug#23504)

If elements in a non-top-level IN subquery were accessed by an index and the subquery result set included a NULL value, the quantified predicate that contained the subquery was evaluated to NULL when it should return a non-NULL value. (Bug#23478)

When applying the group_concat_max_len limit, GROUP_CONCAT() could truncate multi-byte characters in the middle. (Bug#23451)

mysql_affected_rows() could return values different from mysql_stmt_affected_rows() for the same sequence of statements. (Bug#23383)

Accuracy was improved for comparisons between DECIMAL columns and numbers represented as strings. (Bug#23260)

Calculation of COUNT(DISTINCT), AVG(DISTINCT), or SUM(DISTINCT) when they are referenced more than once in a single query with GROUP BY could cause a server crash. (Bug#23184)

Changes to character set variables prior to an action on a replication-ignored table were forgotten by slave servers. (Bug#22877)

Queries using a column alias in an expression as part of an ORDER BY clause failed, an example of such a query being SELECT mycol + 1 AS mynum FROM mytable ORDER BY 30 - mynum. (Bug#22457)

Using EXPLAIN caused a server crash for queries that selected from INFORMATION_SCHEMA in a subquery in the FROM clause. (Bug#22413)

A server crash occurred when using LOAD DATA to load a table containing a NOT NULL spatial column, when the statement did not load the spatial column. Now a NULL supplied to NOT NULL column error occurs. (Bug#22372)

DATE_ADD() requires complete dates with no “zero” parts, but sometimes did not return NULL when given such a date. (Bug#22229)

Some small double precision numbers (such as 1.00000001e-300) that should have been accepted were truncated to zero. (Bug#22129)

For a nonexistent table, DROP TEMPORARY TABLE failed with an incorrect error message if read_only was enabled. (Bug#22077)

Trailing spaces were not removed from Unicode CHAR column values when used in indexes. This resulted in excessive usage of storage space, and could affect the results of some ORDER BY queries that made use of such indexes.

(Bug#22052)

STR_TO_DATE() returned NULL if the format string contained a space following a non-format character. (Bug#22029)

In some cases, the parser failed to distinguish a user-defined function from a stored function. (Bug#21809)

Inserting a default or invalid value into a spatial column could fail with Unknown error rather than a more appropriate error. (Bug#21790)

It was possible to use DATETIME values whose year, month, and day parts were all zeroes but whose hour, minute, and second parts contained nonzero values, an example of such an illegal DATETIME being '0000-00-00 11:23:45'.

This patch was reverted in MySQL 5.1.18. (Bug#21789)

yaSSL crashed on pre-Pentium Intel CPUs. (Bug#21765)

Evaluation of subqueries that require the filesort algorithm were allocating and freeing the sort_buffer_size buffer many times, resulting in slow performance. Now the buffer is allocated once and reused. (Bug#21727)

Through the C API, the member strings in MYSQL_FIELD for a query that contains expressions may return incorrect results. (Bug#21635)

View columns were always handled as having implicit derivation, leading to illegal mix of collation errors for some views in UNION operations. Now view column derivation comes from the original expression given in the view definition. (Bug#21505)

InnoDB crashed while performing XA recovery of prepared transactions. (Bug#21468)

INET_ATON() returned a signed BIGINT value, not an unsigned value. (Bug#21466)

It was possible to set the backslash character (“ \ ”) as the delimiter character using DELIMITER, but not actually possible to use it as the delimiter. (Bug#21412)

Selecting into variables sometimes returned incorrect wrong results. (Bug#20836)

On slave servers, transactions that exceeded the lock wait timeout failed to roll back properly. (Bug#20697)

CONCURRENT did not work correctly for LOAD DATA INFILE. (Bug#20637)

mysql_fix_privilege_tables.sql altered the table_privs.table_priv column to contain too few privileges, causing loss of the CREATE VIEW and SHOW VIEW privileges. (Bug#20589)

With lower_case_table_names set to 1, SHOW CREATE TABLE printed incorrect output for table names containing Turkish I (LATIN CAPITAL LETTER I WITH DOT ABOVE). (Bug#20404)

A query with a subquery that references columns of a view from the outer SELECT could return an incorrect result if used from a prepared statement. (Bug#20327)

For queries that select from a view, the server was returning MYSQL_FIELD metadata inconsistently for view names and table names. For view columns, the server now returns the view name in the table field and, if the column selects from an underlying table, the table name in the org_table field. (Bug#20191)

Invalidating the query cache caused a server crash for INSERT INTO ... SELECT statements that selected from a view. (Bug#20045)

Unsigned BIGINT values treated as signed values by the MOD() function. (Bug#19955)

Compiling PHP 5.1 with the MySQL static libraries failed on some versions of Linux. (Bug#19817)

The DELIMITER statement did not work correctly when used in an SQL file run using the SOURCE statement. (Bug#19799)

For a cast of a DATETIME value containing microseconds to DECIMAL, the microseconds part was truncated without generating a warning. Now the microseconds part is preserved. (Bug#19491)

SQL statements close to the size of max_allowed_packet could produce binary log events larger than max_allowed_packet that could not be read by slave servers. (Bug#19402)

VARBINARY column values inserted on a MySQL 4.1 server had trailing zeroes following upgrade to MySQL 5.0 or later. (Bug#19371)

The server could send incorrect column count information to the client for queries that produce a larger number of columns than can fit in a two-byte number. (Bug#19216)

For some problems relating to character set conversion or incorrect string values for INSERT or UPDATE, the server was reporting truncation or length errors instead. (Bug#18908)

Constant expressions and some numeric constants used as input parameters to user-defined functions were not treated as constants. (Bug#18761)

myisampack wrote to unallocated memory, causing a crash. (Bug#17951)

FLUSH LOGS or mysqladmin flush-logs caused a server crash if the binary log was not open. (Bug#17733)

mysql_fix_privilege_tables did not handle a password containing embedded space or apostrophe characters. (Bug#17700)

Attempting to use a view containing DEFINER information for a non-existent user resulted in an error message that revealed the definer account. Now the definer is revealed only to superusers. Other users receive only an access denied message. (Bug#17254)

IN() and CHAR() can return NULL, but did not signal that to the query processor, causing incorrect results for IS NULL operations. (Bug#17047)

Slave servers would retry the execution of a SQL statement an infinite number of times, ignoring the value SLAVE_TRANSACTION_RETRIES when using the NDB engine. (Bug#16228)

Warnings were generated when explicitly casting a character to a number (for example, CAST('x' AS SIGNED)), but not for implicit conversions in simple arithmetic operations (such as 'x' + 0). Now warnings are generated in all cases. (Bug#11927)

Metadata for columns calculated from scalar subqueries was limited to integer, double, or string, even if the actual type of the column was different. (Bug#11032)

Subqueries of the form NULL IN (SELECT ...) returned invalid results. (Bug#8804, Bug#23485)

Incompatible Change: In MySQL 5.0.13 and up, InnoDB rolls back only the last statement on a transaction timeout. A new option, --innodb_rollback_on_timeout, causes InnoDB to abort and roll back the entire transaction if a transaction timeout occurs (the same behavior as before MySQL 5.0.13). (Bug#24200)

The loose index scan optimization for GROUP BY with MIN or MAX was not applied within other queries, such as CREATE TABLE ... SELECT ..., INSERT ... SELECT ..., or in the FROM clauses of subqueries. (Bug#24156)

The size of MEMORY tables and internal temporary tables was limited to 4GB on 64-bit Windows systems. (Bug#24052)

A stored procedure, executed from a connection using a binary character set, and which wrote multibyte data, would write incorrectly escaped entries to the binary log. This caused syntax errors, and caused replication to fail. (Bug#23619, Bug#24492)

Accuracy was improved for comparisons between DECIMAL columns and numbers represented as strings. (Bug#23260)

Calculation of COUNT(DISTINCT), AVG(DISTINCT), or SUM(DISTINCT) when they are referenced more than once in a single query with GROUP BY could cause a server crash. (Bug#23184)

Evaluation of subqueries that require the filesort algorithm were allocating and freeing the sort_buffer_size buffer many times, resulting in slow performance. Now the buffer is allocated once and reused. (Bug#21727)

InnoDB crashed while performing XA recovery of prepared transactions. (Bug#21468)

Certain malformed INSERT statements could crash the mysql client. (Bug#21142)

CONCURRENT did not work correctly for LOAD DATA INFILE. (Bug#20637)

Several string functions could return incorrect results when given very large length arguments. (Bug#10963)

MySQL Cluster: The ndb_config utility now accepts -c as a short form of the --ndb-connectstring option. (Bug#22295)

MySQL Cluster: Added the --bind-address option for ndbd. This allows a data node process to be bound to a specific network interface. (Bug#22195)

MySQL Cluster: A potential memory leak in the NDB storage engine's handling of file operations was uncovered. (Bug#21858)

MySQL Cluster: The Ndb_number_of_storage_nodes system variable was renamed to Ndb_number_of_data_nodes. (Bug#20848)

MySQL Cluster: The HELP command in the Cluster management client now provides command-specific help. For example, HELP RESTART in ndb_mgm provides detailed information about the START command. (Bug#19620)

If the user specified the server options --max-connections=N or --table-open-cache=M , a warning would be given in some cases that some values were recalculated, with the result that --table-open-cache could be assigned greater value.

It should be noted that, in such cases, both the warning and the increase in the --table-open-cache value were completely harmless. Note also that it is not possible for the MySQL Server to predict or to control limitations on the maximum number of open files, since this is determined by the operating system.

The recalculation code has now been fixed to ensure that the value of --table-open-cache is no longer increased automatically, and that a warning is now given only if some values had to be decreased due to operating system limits. (Bug#21915)

For the CALL statement, stored procedures that take no arguments now can be invoked without parentheses. That is, CALL p() and CALL p are equivalent. (Bug#21462)

mysql_upgrade now passes all the parameters specified on the command line to both mysqlcheck and mysql using the upgrade_defaults file. (Bug#20100)

SHOW STATUS is no longer logged to the slow query log. (Bug#19764)

mysqldump --single-transaction now uses START TRANSACTION /*!40100 WITH CONSISTENT SNAPSHOT */ rather than BEGIN to start a transaction, so that a consistent snapshot will be used on those servers that support it. (Bug#19660)

MySQL Cluster: Restoring a cluster failed if there were any tables with 128 or more columns. (Bug#23502, Bug#23494)

MySQL Cluster: Cluster backups would fail when there were more than 2048 schema objects in the cluster. (Bug#23499)

MySQL Cluster: The management client command ALL DUMP 1000 would cause the cluster to crash if data nodes were connected to the cluster but not yret fully started. (Bug#23203)

MySQL Cluster: INSERT ... ON DUPLICATE KEY UPDATE on an NDB table could lead to deadlocks and memory leaks. (Bug#23200)

MySQL Cluster: (NDB API): Inacivity timeouts for scans were not correctly handled. (Bug#23107)

MySQL Cluster: If a node restart could not be performed from the REDO log, no node takeover took place. This could cause partitions to be left empty during a system restart. (Bug#22893)

MySQL Cluster: Multiple node restarts in rapid succession could cause a system restart to fail , or induce a race condition. (Bug#22892, Bug#23210)

MySQL Cluster: (NDB API): Attempting to read a nonexistent tuple using Commit mode for NdbTransaction::execute() caused node failures. (Bug#22672)

MySQL Cluster: The --help output from NDB binaries did not include file-related options. (Bug#21994)

MySQL Cluster: (NDB API): Scans closed before being executed were still placed in the send queue. (Bug#21941)

MySQL Cluster: A scan timeout returned Error 4028 (Node failure caused abort of transaction) instead of Error 4008 (Node failure caused abort of transaction...). (Bug#21799)

MySQL Cluster: The node recovery algorithm was missing a version check for tables in the ALTER_TABLE_COMMITTED state (as opposed to the TABLE_ADD_COMMITTED state, which has the version check). This could cause inconsistent schemas across nodes following node recovery. (Bug#21756)

MySQL Cluster: The output for the --help option used with NDB executable programs (ndbd, ndb_mgm, ndb_restore, ndb_config, and so on) referred to the Ndb.cfg file, instead of my.cnf. (Bug#21585)

MySQL Cluster: Partition distribution keys were updated only for the primary and starting replicas during node recovery. This could lead to node failure recovery for clusters having an odd number of replicas.

(Bug#21535)

MySQL Cluster: The ndb_mgm management client did not set the exit status on errors, always returning 0 instead. (Bug#21530)

MySQL Cluster: Attempting to create an NDB table on a MySQL with an existing non-Cluster table with the same name in the same database could result in data loss or corruption. MySQL now issues a warning when a SHOW TABLES or other statement causing table discovery finds such a table. (Bug#21378)

MySQL Cluster: Cluster logs were not rotated following the first rotation cycle. (Bug#21345)

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)

MySQL Cluster: Condition pushdown did not work correctly with DATETIME columns. (Bug#21056)

MySQL Cluster: (NDB API): The NdbOperation::getBlobHandle() method, when called with the name of a nonexistent column, caused a segmentation fault. (Bug#21036)

MySQL Cluster: Under some circumstances, local checkpointing would hang, keeping any unstarted nodes from being started. (Bug#20895)

MySQL Cluster: Using an invalid node ID with the management client STOP command could cause ndb_mgm to hang. (Bug#20575)

MySQL Cluster: (NDB API): When multiple processes or threads in parallel performed the same ordered scan with exclusive lock and updating the retrieved records, the scan could skip some records, which were not updated as a result. (Bug#20446)

MySQL Cluster: Data nodes added while the cluster was running in single user mode were all assigned node ID 0, which could later cause multiple node failures. Adding of nodes in single user mode is no longer possible. (Bug#20395)

MySQL Cluster: In some cases where SELECT COUNT(*) from an NDB table should have yielded an error, MAX_INT was returned instead. (Bug#19914)

MySQL Cluster: Following the restart of an MGM node, the Cluster management client did not automatically reconnect. (Bug#19873)

MySQL Cluster: Error messages given when trying to make online changes parameters such as NoOfReplicas thast can only be changed via a complete shutdown and restart of the cluster did not indicate the true nature of the problem. (Bug#19787)

MySQL Cluster: ndb_restore did not always make clear that it had recovered successfully from temporary errors while restoring a cluster backup. (Bug#19651)

MySQL Cluster: In rare situations with resource shortages, a crash could result from insufficient IndexScanOperations. (Bug#19198)

MySQL Cluster: ndb_mgm -e show | head would hang after displaying the first 10 lines of output. (Bug#19047)

MySQL Cluster: The error returned by the cluster when too many nodes were defined did not make clear the nature of the problem. (Bug#19045)

MySQL Cluster: The ndb_config utility did not perform host lookups correctly when using the --host option. (Bug#17582)

MySQL Cluster: The ndb_config utility did not perform host lookups correctly when using the --host option (Bug#17582)

MySQL Cluster: A problem with takeover during a system restart caused ordered indexes to be rebuilt incorrectly. (Bug#15303)

There was a race condition in the InnoDB fil_flush_file_spaces() function. (Bug#24089)

Some yaSSL-related memory leaks detected by Valgrind were fixed. (Bug#23981)

The internal SQL interpreter of InnoDB placed an unnecessary lock on the supremum record when innodb_locks_unsafe_for_binlog=1. This caused an assertion failure when InnoDB was built with debugging enabled. (Bug#23769)

M % 0 returns NULL, but ( M % 0) IS NULL evaluated to false. (Bug#23411)

For not-yet-authenticated connections, the Time column in SHOW PROCESSLIST was a random value rather than NULL. (Bug#23379)

MySQL would fail to build on the Alpha platform. (Bug#23256)

If COMPRESS() returned NULL, subsequent invocations of COMPRESS() within a result set or within a trigger also returned NULL. (Bug#23254)

Insufficient memory (myisam_sort_buffer_size) could cause a server crash for several operations on MyISAM tables: repair table, create index by sort, repair by sort, parallel repair, bulk insert. (Bug#23175)

The column default value in the output from SHOW COLUMNS or SELECT FROM INFORMATION_SCHEMA.COLUMNS was truncated to 64 characters. (Bug#23037)

mysql did not check for errors when fetching data during result set printing. (Bug#22913)

InnoDB exhibited thread thrashing with more than 50 concurrent connections under an update-intensive workload. (Bug#22868)

The return value from my_seek() was ignored. (Bug#22828)

The optimizer failed to use equality propagation for BETWEEN and IN predicates with string arguments. (Bug#22753)

The Host column in SHOW PROCESSLIST output was blank when the server was started with the --skip-grant-tables option. (Bug#22728)

The Handler_rollback status variable sometimes was incremented when no rollback had taken place. (Bug#22728)

If a table contains an AUTO_INCREMENT column, inserting into an insertable view on the table that does not include the AUTO_INCREMENT column should not change the value of LAST_INSERT_ID(), because the side effects of inserting default values into columns not part of the view should not be visible. MySQL was incorrectly setting LAST_INSERT_ID() to zero. (Bug#22584)

Instance Manager had a race condition involving mysqld PID file removal. (Bug#22379)

The optimizer used the ref join type rather than eq_ref for a simple join on strings. (Bug#22367)

Some queries that used MAX() and GROUP BY could incorrectly return an empty result. (Bug#22342)

If an init_connect SQL statement produced an error, the connection was silently terminated with no error message. Now the server writes a warning to the error log. (Bug#22158)

Use of PREPARE with a CREATE PROCEDURE statement that contained a syntax error caused a server crash. (Bug#21868)

Use of a DES-encrypted SSL certificate file caused a server crash. (Bug#21868)

Adding a day, month, or year interval to a DATE value produced a DATE, but adding a week interval produced a DATETIME value. Now all produce a DATE value. (Bug#21811)

Use of a subquery that invoked a function in the column list of the outer query resulted in a memory leak. (Bug#21798)

Selecting from a MERGE table could result in a server crash if the underlying tables had fewer indexes than the MERGE table itself. (Bug#21617, Bug#22937)

After FLUSH TABLES WITH READ LOCK followed by UNLOCK TABLES, attempts to drop or alter a stored routine failed with an error that the routine did not exist, and attempts to execute the routine failed with a lock conflict error. (Bug#21414)

For multiple-table UPDATE statements, storage engines were not notified of duplicate-key errors. (Bug#21381)

Within a prepared statement, SELECT (COUNT(*) = 1) (or similar use of other aggregate functions) did not return the correct result for statement re-execution. (Bug#21354)

It was possible for a stored routine with a non-latin1 name to cause a stack overrun. (Bug#21311)

Creating a TEMPORARY table with the same name as an existing table that was locked by another client could result in a lock conflict for DROP TEMPORARY TABLE because the server unnecessarily tried to acquire a name lock. (Bug#21096)

Incorrect results could be obtained from re-execution of a parametrized prepared statement or a stored routine with a SELECT that uses LEFT JOIN with a second table having only one row. (Bug#21081)

Within a stored routine, a view definition cannot refer to routine parameters or local variables. However, an error did not occur until the routine was called. Now it occurs during parsing of the routine creation statement.

(Bug#20953)

In mysql, invoking connect or \r with very long db_name or host_name parameters caused buffer overflow. (Bug#20894)

SHOW VARIABLES truncated the Value field to 256 characters. (Bug#20862)

WITH ROLLUP could group unequal values. (Bug#20825)

Range searches on columns with an index prefix could miss records. (Bug#20732)

An UPDATE that referred to a key column in the WHERE clause and activated a trigger that modified the column resulted in a loop. (Bug#20670)

LIKE searches failed for indexed utf8 character columns. (Bug#20471)

With SQL_MODE=TRADITIONAL, MySQL incorrectly aborted on warnings within stored routines and triggers. (Bug#20028)

mysqldump --xml produced invalid XML for BLOB data. (Bug#19745)

Column names were not quoted properly for replicated views. (Bug#19736)

FLUSH INSTANCES in Instance Manager triggered an assertion failure. (Bug#19368)

For a debug server, a reference to an undefined user variable in a prepared statment executed with EXECUTE caused an assertion failure. (Bug#19356)

Within a trigger for a base table, selecting from a view on that base table failed. (Bug#19111)

The value of the warning_count system variable was not being calculated correctly (also affecting SHOW COUNT(*) WARNINGS). (Bug#19024)

DELETE IGNORE could hang for foreign key parent deletes. (Bug#18819)

InnoDB used table locks (not row locks) within stored functions. (Bug#18077)

mysql would lose its connection to the server if its standard output was not writable. (Bug#17583)

mysql-test-run did not work correctly for RPM-based installations. (Bug#17194)

A client library crash was caused by executing a statement such as SELECT * FROM t1 PROCEDURE ANALYSE() using a server side cursor on a table t1 that does not have the same number of columns as the output from PROCEDURE ANALYSE(). (Bug#17039)

The WITH CHECK OPTION for a view failed to prevent storing invalid column values for UPDATE statements. (Bug#16813)

InnoDB showed substandard performance with multiple queries running concurrently. (Bug#15815)

ALTER TABLE was not able to rename a view. (Bug#14959)

Statements such as DROP PROCEDURE and DROP VIEW were written to the binary log too late due to a race condition. (Bug#14262)

A literal string in a GROUP BY clause could be interpreted as a column name. (Bug#14019)

Instance Manager didn't close the client socket file when starting a new mysqld instance. mysqld inherited the socket, causing clients connected to Instance Manager to hang. (Bug#12751)

Entries in the slow query log could have an incorrect Rows_examined value. (Bug#12240)

Lack of validation for input and output TIME values resulted in several problems: SEC_TO_TIME() within subqueries incorrectly clipped large values; SEC_TO_TIME() treated BIGINT UNSIGNED values as signed; only truncation warnings were produced when both truncation and out-of-range TIME values occurred. (Bug#11655, Bug#20927)

A locking safety check in InnoDB reported a spurious error stored_select_lock_type is 0 inside ::start_stmt() for INSERT ... SELECT statements in innodb_locks_unsafe_for_binlog mode. The safety check was removed. (Bug#10746)

FROM_UNIXTIME() did not accept arguments up to POWER(2,31)-1, which it had previously. (Bug#9191)

OPTIMIZE TABLE with myisam_repair_threads > 1 could result in MyISAM table corruption. (Bug#8283)

Transient errors in replication from master to slave may trigger multiple Got fatal error 1236: 'binlog truncated in the middle of event' errors on the slave. (Bug#4053)

Binary MySQL distributions no longer include a mysqld-max server, except for RPM distributions. Instead, distributions contain a mysqld binary that includes the features previously included in the mysqld-max binary.

MySQL 5.0.26 introduced an ABI incompatibility, which this release reverts. Programs compiled against 5.0.26 are not compatible with any other version and must be recompiled. (Bug#23427)

InnoDB: Reduced optimization level for Windows 64 builds to handle possible memory overrun. (Bug#19424)