付録C MySQL Change History

Incompatible change: TRUNCATE TABLE now requires the DROP privilege rather than the DELETE privilege. (Bug #23556).

NDB Cluster (Cluster APIs): A new ndb_mgm_get_clusterlog_loglevel() function was added to the MGM API.

For more information, see ndb_mgm_get_clusterlog_loglevel().

NDB Cluster (Cluster APIs) / Incompatible change: The AbortOption type is now a member of the NdbOperation class; its values and behavior have also changed. NdbTransaction::AbortOption can no longer be used, and applications written against the NDB API may need to be rewritten and recompiled to accomodate these changes.

See The NdbOperation::AbortOption Type, for more information.

NDB Cluster: Previously, when a data node failed more than 8 times in succession to start, this caused a forced shutdown of the cluster. Now, when a data node fails to start 7 consecutive times, the node will not start again until it is started with the --initial option, and a warning to this effect is written to the error log. (Bug #25984)

NDB Cluster: A number of new and more descriptive error messages covering transporter errors were added. (Bug #22025)

NDB Cluster: In the event that all cluster management and API nodes are configured with ArbitrationRank=0, ndb_mgmd now issues the following warning when starting: Cluster configuration warning: Neither MGM nor API nodes are configured with arbitrator, may cause complete cluster shutdown in case of host failure. (Bug #23546)

In the INFORMATION_SCHEMA REFERENTIAL_CONSTRAINTS table, the UNIQUE_CONSTRAINT_NAME column incorrectly named the referenced table. Now it names the referenced constraint, and a new column, REFERENCED_TABLE_NAME, names the referenced table. (Bug #21713)

RAND() now allows non-constant initializers (such as a column name) as its argument. In this case, the seed is initialized with the value for each invocation of RAND(). (One implication of this is that for equal argument values, RAND() will return the same value each time.) (Bug #6172)

The bundled yaSSL library was upgraded to version 1.5.8.

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

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

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

NDB Cluster (Cluster APIs / Disk Data): A delete and a read peformed in the same operation could cause one or more of the cluster's data nodes to crash. This could occur when the operation affected more than 5 columns concurrently, or when one or more of the columns was of the VARCHAR type and was stored on disk. (Bug #25794)

NDB Cluster (Replication): The error message Last_Errno: 4294967295, Error in Write_rows event now supplies a valid error code. (Bug #19896)

NDB Cluster (Replication): Under some circumstances, the binlog thread could shut down while the slave SQL thread was still using it. (Bug #26015, Bug #26019)

NDB 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)

A memory leak could cause problems during a node or cluster shutdown or failure. (Bug #25997)

NDB Cluster: An appropriate error message was not provided when there was insufficient REDO log file space for the cluster to start. (Bug #25801)

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

NDB Cluster: A memory allocation failure in the cluster Subscription Manager could cause the cluster to crash. (Bug #25239)

NDB Cluster: In the event that cluster backup parameters such as BackupWriteSize were incorrectly set, no appropriate error was issued to indicate that this was the case. (Bug #19146)

Using an INFORMATION_SCHEMA table with ORDER BY in a subquery could cause a server crash. (Bug #24630)

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

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

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

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)

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

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

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

ALTER TABLE caused loss of CASCADE clauses for InnoDB tables. (Bug #24741)

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

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

Use of already freed memory caused SSL connections to hang forever. (Bug #19209)

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

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

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

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

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

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

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

The optimizer used a filesort rather than a const table read in some cases when the latter was possible. (Bug #16590)

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)

Indexes disabled with ALTER TABLE ... DISABLE KEYS could in some cases be used by specifying FORCE INDEX. (Bug #20604)

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)

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

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

The server might fail to use an appropriate index for DELETE when ORDER BY, LIMIT, and a non-restricting WHERE are present. (Bug #17711)

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)

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).

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

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).

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

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

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).

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)

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

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)

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)

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)

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

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)

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

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

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

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)

Certain joins using Range checked for each record in the query execution plan could cause the server to crash. (Bug #24776)

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)

A nested query on a partitioned table returned fewer records than on the corresponding non-partitioned table, when the subquery affected more than one partition. (Bug #24186)

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

Incompatible change: The following conditions apply to enabling the read_only system variable:

Previously, the attempt to enable read_only would return immediately even if explicit locks or transactions were pending, so some data changes could occur for statements executing in the server at the same time. (Bug #11733, Bug #22009)

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)

Important: When using MERGE tables the definition of the MERGE table and the MyISAM tables are checked each time the tables are opened for access (including any SELECT or INSERT statement. Each table is compared for column order, types, sizes and associated. If there is a difference in any one of the tables then the statement will fail.

Remote servers for use with the FEDERATED storage engine now can be managed with the new CREATE/ALTER/DROP SERVER syntax.

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.

Partitioning of tables using the FEDERATED storage engine is no longer permitted. Attempting to create such a table or to modify an existing table so that is uses both partitioning and FEDERATED now fails with an error. (Bug #22451)

In MySQL 5.1, 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 in MySQL 4.1). (Bug #24200)

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 default value of the max_connections variable has been increased to 151 in order that Websites running on Apache and using MySQL will not have more processes trying to access MySQL than the default number of connections available.

(The maximum number of Apache processes is determined by the Apache MaxClient, which defaults to 256, but is usually set to 150 in the httpd.conf commonly distributed with Apache. For more information about MaxClient, see http://httpd.apache.org/docs/2.2/mod/mpm_common.html#maxclients.)

(Bug #23883)

The bundled yaSSL library was upgraded to version 1.5.0.

Calling a non-deterministic stored routine when using statement-based replication now throws an error. Formerly, defining such a stored routine would cause an error to be thrown. (Bug #16456)

The (undocumented) UNIQUE_USERS() and and GROUP_UNIQUE_USERS() functions were removed. (Bug #22687)

NDB Cluster: The LockPagesInMainMemory configuration parameter has changed its type and possible values. For more information, see LockPagesInMainMemory. (Bug #25686)

Important: The values true and false are no longer accepted for this parameter. If you were using this parameter and had it set to false in a previous release, you must change it to 0. If you had this parameter set to true, you should instead use 1 to obtain the same behavior as previously, or 2 to take advantage of new functionality introduced with this release described in the section cited above.

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)

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

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

mysqltest_embedded crashed at startup. (Bug #25890)

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

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

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)

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)

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)

Using CREATE TABLE ... SELECT and rolling back the transaction would leave an empty table on the master, but the instructions would not be recorded in the binary log and therefore replicated to the slave. This would result in a difference between the master and slave databases. An implicit commit has been added to ensure consistency. (Bug #22865)

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)

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)

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

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)

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

Using row-based replication to replicate to a table having at least one extra BIT column with a default value on the slave as compared to the master could cause the slave to fail. (Bug #24490)

Optimizations that are legal only for subqueries without tables and WHERE conditions were applied for any subquery without tables. (Bug #24670)

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

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)

CREATE TABLE ... SELECT statements were not rolled back correctly. As part of the fix, such a statement now causes an implicit commit before and after it is executed. However, it does not cause a commit when used to create a temporary table. (Bug #22864)

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

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

mysqltest incorrectly tried to retrieve result sets for some queries where no result set was available. (Bug #19410)

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

The server was built even when configure was run with the --without-server option. (Bug #23973)

mysqld_error.h was not installed when only the client libraries were built. (Bug #21265)

mysql_install_db did not create the mysql.plugin table if strict SQL mode was enabled. (Bug #24270)

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

Using a view in combination with a USING clause caused column aliases to be ignored. (Bug #25106)

Using ALTER TABLE to convert a CSV table containing NULL values to MyISAM resulted in warnings. (Bug #21328)

A view was not handled correctly if the SELECT part contained ‘\Z’. (Bug #24293)

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)

An assertion failed incorrectly for prepared statements that contained a single-row non-correlated subquery that was used as an argument of the IS NULL predicate. (Bug #25027)

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)

Dropping a user-defined function sometimes did not remove the UDF entry from the mysql.proc table. (Bug #15439)

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

Some problems uncovered by Valgrind were fixed. (Bug #25396)

mysql_fix_privilege_tables did not handle a password containing embedded space or apostrophe characters. (Bug #17700)

On Windows, the SLEEP() function could sleep too long, especially after a change to the system clock. (Bug #14094, Bug #17635, Bug #24686)

In the INFORMATION_SCHEMA.KEY_COLUMN_USAGE table, the value displayed for the REFERENCED_TABLE_NAME column was the table name as encoded for disk storage, not the actual table name. (Bug #25026)

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

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)

For ENUM columns defined such that enumeration values contained commas, the commas were mapped to 0xff. (Bug #24660)

Upgrade note: The fix for this problem affects tables containing ENUM columns that actually do have 0xff in enumeration values. Such tables should be dumped using mysqldump with the current server before upgrading to MySQL 5.1.15 or higher and reloading the tables.

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)

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)

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)

mysqldump --order-by-primary failed if the primary key name was an identifier that required quoting. (Bug #13926)

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

The internal functions for table preparation, creation, and alteration were not re-execution friendly, causing problems in code that: repeatedly altered a table; repeatedly created and dropped a table; opened and closed a cursor on a table, altered the table, and then reopened the cursor. (Bug #4968, Bug #6895, Bug #19182, Bug #19733)

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

The Instance Manager DROP INSTANCE command did not work. (Bug #23476)

The Instance Manager STOP INSTANCE command took too much time and caused Instance Manager to be unresponsive. (Bug #23215)

The Instance Manager STOP INSTANCE command could not be applied to instances in the Crashed, Failed, or Abandoned state. (Bug #22306)

Instance Manager could crash during shutdown. (Bug #19044)

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 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)

Referencing an ambiguous column alias in an expression in the ORDER BY clause of a query caused the server to crash. (Bug #25427)

Some CASE statements inside stored routines could lead to excessive resource usage or a crash of the server. (Bug #24854, Bug #19194)

Some joins in which one of the joined tables was a view could return erroneous results or crash the server. (Bug #24345)

OPTIMIZE TABLE tried to sort R-tree indexes such as spatial indexes, although this is not possible (see 「OPTIMIZE TABLE 構文」). (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)

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)

Under some circumstances, a REORGANIZE PARTITION statement could crash mysqld. (Bug #24502)

A multi-table DELETE QUICK could sometimes cause one of the affected tables to become corrupted. (Bug #25048)

A compressed MyISAM table that became corrupted could crash myisamchk and possibly the MySQL Server. (Bug #23139)

Using INSTALL PLUGIN followed by a restart of the server caused an error due to memory not being properly initialized. (Bug #22694)

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)

The FEDERATED storage engine did not support the utf8 character set. (Bug #17044)

mysql_upgrade failed if the --password (or -p) option was given. (Bug #24896)

For a nonexistent table, DROP TEMPORARY TABLE failed with an incorrect error message if read_only was enabled. (Bug #22077)

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)

The REPEAT() function could return NULL when passed a column for the count argument. (Bug #24947)

Accuracy was improved for comparisons between DECIMAL columns and numbers represented as strings. (Bug #23260)

InnoDB crashed while performing XA recovery of prepared transactions. (Bug #21468)

ROW_COUNT() did not work properly as an argument to a stored procedure. (Bug #23760)

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'. (Bug #21789)

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)

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)

An ALTER TABLE statement that used a RENAME clause in combination with a MODIFY or CHANGE that did not actually change the table (for example, when it changed a column's type from INT to INT). The behavior caused by this bug differed according to whether or not the storage engine used by the table was transactional or non-transactional. For transactional tables (such as those using the InnoDB storage engine), the statement simply failed; for non-transactional tables (such as those using the MyISAM storage engine), the ALTER TABLE statement succeeding renaming the table, but subsequent SELECT statements against the renamed table would fail. (Bug #22369)

Queries of the form SELECT ... WHERE string = ANY(...) failed when the server used a single-byte character set and the client used a multi-byte character set. (Bug #20835)

A partitioned table that used the DATA DIRECTORY option, where the data directory was the same as the directory in which the table definition file resided, became corrupted following ALTER TABLE ENGINE=ARCHIVE. This was actually due to an issue with the ARCHIVE storage engine, and not with partitioned tables in general. (Bug #22634)

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

NDB Cluster (Replication): Certain errors in replication setups could lead to subsequent node failures. (Bug #25755)

NDB Cluster (Replication): Connecting a mysqld to a cluster where not all nodes were running, starting the remaining cluster nodes, and then disconnecting from the cluster caused the mysqld process to crash. (Bug #25387)

NDB Cluster (Replication): Connecting an API node to the cluster during a node restart while performing database operations could cause the restarting node to fail. (Bug #25329)

NDB Cluster (Disk Data): Following 3 or more missed local checkpoints by a cluster node, a restart of the node caused incorrect undo information to be used for Disk Data tables. (Bug #25636)

NDB Cluster (Disk Data): Issuing a TRUNCATE statement on a Disk Data table caused the table to become an in-memory table. (Bug #25296)

NDB Cluster (Disk Data): Changing a column specification on a Disk Data table caused the table to become an in-memory table. (Bug #24667)

NDB 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)

NDB Cluster: Hosts in clusters with a large number of nodes could experience excessive CPU usage while obtaining configuration data. (Bug #25711)

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

NDB Cluster: Non-32-bit, non-aligned columns were not handled correctly in explicitly partitioned NDB tables. (Bug #25587)

NDB Cluster: Some aggregate queries such as SELECT COUNT(*) performed a table scan on NDB tables rather than checking table statistics, causing such queries to perform much more slowly in MySQL Cluster 5.1 than in 5.0. (Bug #25567)

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

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

NDB Cluster: The failure of a node during a local checkpoint could lead to other node failures. (Bug #25468)

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

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

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

NDB Cluster: A potential memory leak in the NDB storage engine's handling of file operations was uncovered. (Bug #21858)

NDB Cluster: When stopping and restarting multiple data nodes, the last node to be restarted would sometimes hang in Phase 100. (Bug #19645)

NDB 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)

NDB Cluster (NDB API): A unique index lookup on a non-existent tuple could lead to a data node timeout (error 4012). (Bug #25059)

NDB Cluster (NDB API): Due to an error in the computation of table fragment arrays, some transactions might not be executed from the correct starting point. (Bug #24914)

NDB Cluster (Replication): Following a restart of the master cluster, the latest GCI was set to 0 upon reconnection to the slave. (Bug #21806)

NDB Cluster (Disk Data): A MEDIUMTEXT column of a Disk Data table was stored in memory rather than on disk, even if the column was not indexed. (Bug #25001)

NDB Cluster (Disk Data): Performing a node restart with a newly dropped Disk Data table could lead to failure of the node during the restart. (Bug #24917)

NDB Cluster (Disk Data): When restoring from backup a cluster containing any Disk Data tables with hidden primary keys, a node failure resulted which could lead to a crash of the cluster. (Bug #24166)

NDB Cluster (Disk Data): Repeated CREATE, DROP, or TRUNCATE in various combinations with system restarts between these operations could lead to the eventual failure of a system restart. (Bug #21948)

NDB Cluster (Disk Data): Extents that should have been available for re-use following a DROP TABLE operation were not actually made available again until after the cluster performed a local checkpoint. (Bug #17605)

NDB Cluster: Under certain rare circumstances, local checkpoints were not performed properly, leading to an inability to restart one or more data nodes. (Bug #24664)

NDB Cluster (NDB API): When using the NdbTransaction::execute() method, a very long timeout (greater than 5 minutes) could result if the last data node being polled was disconnected from the cluster. (Bug #24949)

NDB Cluster: 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)

NDB 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)

NDB Cluster: ndb_config failed when trying to use 2 management servers and node IDs. (Bug #23887)

STR_TO_DATE() returned NULL if the format string contained a space following a non-format character. (Bug #22029)

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

Selecting into variables sometimes returned incorrect wrong results. (Bug #20836)

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)

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)

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)

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)

VARBINARY column values inserted on a MySQL 4.1 server had trailing zeroes following upgrade to MySQL 5.0 or later. (Bug #19371)

Subqueries of the form NULL IN (SELECT ...) returned invalid results. (Bug #8804, Bug #23485)

The --extern option for mysql-test-run.pl did not function correctly. (Bug #24354)

ALTER TABLE statements that performed both RENAME TO and {ENABLE|DISABLE} KEYS operations caused a server crash. (Bug #24089)

The MySQL 5.1.12 binaries for Windows were missing the FEDERATED, EXAMPLE, and BLACKHOLE storage engines. (Bug #23900)

myisampack wrote to unallocated memory, causing a crash. (Bug #17951)

Some small double precision numbers (such as 1.00000001e-300) that should have been accepted were truncated to zero. (Bug #22129)

The mysql.server script used the source command, which is less portable than the . command; it now uses . instead. (Bug #24294)

DATE_ADD() requires complete dates with no 「zero」 parts, but sometimes did not return NULL when given such a date. (Bug #22229)

Using FLUSH TABLES in one connection while another connection is using HANDLER statements caused a server crash. (Bug #21587)

FLUSH LOGS or mysqladmin flush-logs caused a server crash if the binary log was not open. (Bug #17733)

On HP-UX, mysqltest (non-thread-safe) crashed due to being linked against a thread-safe libmysys library. (Bug #23984)

Incompatible change: Previously, you could create a user-defined function (UDF) or stored function with the same name as a built-in function, but could not invoke the UDF. Now an error occurs if you try to create such a UDF. The server also now generates a warning if you create a stored function with the same name as a built-in function. It is not considered an error to create a stored function with the same name as a built-in function because you can invoke the function using db_name.func_name() syntax. However, the server now generates a warning in this case. (Bug #22619, Bug#18239)

See 「関数名の構文解析と名前解決」, for the rules describing how the server interprets references to different kinds of functions.

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)

NDB Cluster: Two major changes have taken place with regard to the MySQL Cluster system tables. These are:

Note: When upgrading from versions of MySQL previous to 5.1.14 to 5.1.14 or later, mysql_fix_privilege_tables merely creates a new mysql.ndb_binlog_index table, but does not remove the existing cluster database (or, if upgrading from MySQL 5.1.7 or earlier, the existing cluster_replication database), nor any of the tables in it.

For more information, see 「レプリケーション スキーマおよびテーブル」.

NDB 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)

NDB Cluster: Backup messages are now printed to the Cluster log. (Bug #24544)

NDB Cluster: The error message Management server closed connection, when recorded in the MySQL error log, now includes a timestamp indicating when the error took place. (Bug #21519)

NDB Cluster (Disk Data): The output of mysqldump now includes by default all tablespace and logfile group definitions used by any tables or databases that are dumped. (Bug #20839)

Note: The working of the --all-tablespaces or -Y option for mysqldump remains unaffected by this change.

Direct and indirect usage of stored routines, user-defined functions, and table references is now prohibited in CREATE EVENT and ALTER EVENT statements. (Bug #22830)

See 「CREATE EVENT Syntax」, and 「ALTER EVENT Syntax」, for more specific information.

DROP TRIGGER now supports an IF EXISTS clause. (Bug #23703)

NDB Cluster: If the value set for MaxNoOfAttributes is excessive, a suitable error message is now returned. (Bug #19352)

NDB Cluster: Setting the configuration parameter LockPagesInMainMemory had no effect. (Bug #24461)

NDB Cluster: Multiple occurrences of error conditions were logged with duplicat error messages rather than being being reported with a single error message stating that the error was encountered N times. (Bug #22313)

NDB Cluster: Sudden disconnection of an SQL or data node could lead to shutdown of data nodes with the error failed ndbrequire. (Bug #24447)

NDB Cluster: Different error messages were returned for similar cases involving failure to allocate memory for Cluster operations. (Bug #19203)

NDB Cluster: Some values of MaxNoOfTriggers could cause the server to become inaccessible following startup of of the data nodes. (Bug #19454)

NDB Cluster (Replication): If errors occurred during purging of the binary logs, extraneous rows could remain left in the binlog_index table. (Bug #15021)

NDB Cluster (Disk Data): ndb_restore could sometimes fail when attempting to restore Disk Data tables due to data node failure caused by accessing unitialized memory. (Bug #24331)

NDB Cluster (Disk Data): Excessive fragmentation of Disk Data files (including log files and data files) could occur during the course of normal use. (Bug #24143)

NDB Cluster (Disk Data): It was possible to execute a statement for creating a Disk Data table that referred to a nonexistent tablespace, in which case the table was an in-memory NDB table. Such a statement instead now fails with an appropriate error message. (Bug #23576)

NDB Cluster (Disk Data): Under some circumstances, a DELETE from a Disk Data table could cause mysqld to crash. (Bug #23542)

NDB 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)

NDB Cluster: A value equal to or greater than the allowed maximum for LongMessageBuffer caused all data nodes to crash. (Bug #22547)

NDB Cluster: The failure of a data node failure during a schema operation could lead to additional node failures. (Bug #24752)

NDB Cluster: A committed read could be attempted before a data node had time to connect, causing a timeout error. (Bug #24717)

NDB Cluster: The simultaneous shutdown of mysqld and ndbd processes caused unnecessary locking. (Bug #24655)

NDB Cluster: The failure of the master node in a node group during the allocation of node IDs could cause ndb_mgmd to hang. (Bug #24543)

NDB Cluster: In certain rare cases, a data node could crash due to a typographical error in the MySQL Cluster source code. (Bug #24476)

NDB Cluster: Creating a new tables containing a BLOB column when the server was short of memory could cause the server to crash. (Bug #24470)

NDB Cluster: Any statement following the execution of CREATE TABLE ... LIKE ndb_table (where ndb_table was a table using the NDB storage engine), would cause the mysql client to hang. (Bug #24301)

NDB Cluster: When the management client command ALL RESTART -i was executed while one data node was not running, all data nodes in the cluster were shut down. (Bug #24105)

NDB Cluster: A query using an index scan followed by a delete operation, and then a rollback could cause one or more data nodes to crash. (Bug #24039)

NDB 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)

NDB Cluster: It was possible for the sum of the MaxNoOfTables, MaxNoOfOrderedIndexes, and MaxNoOfUniqueHashIndexes configuration parameters, plus the number of system tables to exceed the maximum value for a Uint32 number. In such a case, the cluster's data nodes failed to start, and no reason for this could easily be determined from the error messages provided. (Bug #22548)

NDB Cluster: Given a table mytbl in a database mydb on a MySQL Server acting as an SQL node in a MySQL Cluster, then, following multiple ALTER TABLE mytbl ENGINE=engine statements — first, to change the storage engine used for a table to NDB, and then again to change the table to use a non-NDB storage engine — a DROP DATABASE mydb statement executed on any SQL node in the cluster would cause mydb to be dropped on all SQL nodes in the cluster, even if mydb contained non-NDB tables. (Bug #21495)

NDB Cluster: An incorrect error message was displayed in the event that the value of the MaxNoOfOrderedIndexes parameter was set too low. (Bug #20065)

NDB Cluster: An incorrect error message was displayed in the event that the value of the DataMemory parameter was insufficient for the amount of data to be stored by the cluster. (Bug #19808)

NDB 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 stack size for NetWare binaries was increased to 128KB to prevent problems caused by insufficient stack size. (Bug #23504)

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)

The size of MEMORY tables and internal temporary tables was limited to 4GB on 64-bit Windows systems. (Bug #24052)

For debug builds, mysqladmin shutdown displayed an extraneous skipped 9 bytes from file: socket (3) message. (Bug #21428)

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)

CREATE FUNCTION X() and CREATE FUNCTION Y() failed with a syntax error instead of warning the user that these function names are already used (for GIS functions). (Bug #21025)

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)

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)

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.

Note: When upgrading, it is necessary to re-create any existing indexes on Unicode CHAR columns in order to take advantage of the fix. This can be done by using a REPAIR TABLE statement on each affected table.

(Bug #22052)

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)

BENCHMARK, ENCODE, DECODE, and FORMAT could only accept a constant for some parameters, and could not be used in prepared statements. (Bug #22684)

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)

Constant expressions and some numeric constants used as input parameters to user-defined functions were not treated as constants. (Bug #18761)

INET_ATON() returned a signed BIGINT value, not an unsigned value. (Bug #21466)

In some cases, the parser failed to distinguish a user-defined function from a stored function. (Bug #21809)

In some cases, a function that should be parsed as a user-defined function was parsed as a stored function. (Bug #24736)

Subqueries for which a pushed-down condition did not produce exactly one key field could cause a server crash. (Bug #24056)

LAST_DAY('0000-00-00') could cause a server crash. (Bug #23653)

Through the C API, the member strings in MYSQL_FIELD for a query that contains expressions may return incorrect results. (Bug #21635)

mysql_affected_rows() could return values different from mysql_stmt_affected_rows() for the same sequence of statements. (Bug #23383)

IN() and CHAR() can return NULL, but did not signal that to the query processor, causing incorrect results for IS NULL operations. (Bug #17047)

Instance Manager option-parsing code caused memory-allocation errors. (Bug #22242)

A trigger that invoked a stored function could cause a server crash when activated by different client connections. (Bug #23651)

CONCURRENT did not work correctly for LOAD DATA INFILE. (Bug #20637)

The server source code had multiple exportable definitions of the field_in_record_is_null() function. These are now all declared static. (Bug #24190)

Inserting a default or invalid value into a spatial column could fail with Unknown error rather than a more appropriate error. (Bug #21790)

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)

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)

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)

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 column derivation comes from the original expression given in the view definition. (Bug #21505)

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)

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)

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)

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)

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

Some unnecessary Valgrind warnings were removed from the server. (Bug #24488, Bug #24533).

Using EXPLAIN caused a server crash for queries that selected from INFORMATION_SCHEMA in a subquery in the FROM clause. (Bug #22413)

Invalidating the query cache caused a server crash for INSERT INTO ... SELECT statements that selected from a view. (Bug #20045)

With row-based binary logging, replicated multiple-statement transaction deadlocks did not return the correct error code, causing the slave SQL thread to stop rather than roll back and re-execute. (Bug #23831)

With row-based binary logging, for CREATE TABLE IF NOT EXISTS LIKE temporary_table statements, the IF NOT EXISTS clause was not logged. (Bug #22762)

With row-based binary logging, CREATE TABLE IF NOT EXISTS SELECT statements were not logged properly. (Bug #22027)

On slave servers, transactions that exceeded the lock wait timeout failed to roll back properly. (Bug #20697)

Changes to character set variables prior to an action on a replication-ignored table were forgotten by slave servers. (Bug #22877)

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)

When applying the group_concat_max_len limit, GROUP_CONCAT() could truncate multi-byte characters in the middle. (Bug #23451)

For view renaming, the table name to filename encoding was not performed. (Bug #21370)

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)

The XPath operators < and >, as implemented in the ExtractValue() function, operated in reverse. (Bug #22823)

Incompatible change: The number of function names affected by IGNORE_SPACE was reduced significantly in MySQL 5.1.13, from about 200 to about 30. (For details about IGNORE_SPACE, see 「関数名の構文解析と名前解決」.) This change improves the consistency of parser operation. However, it also introduces the possibility of incompatibility for old SQL code that relies on the following conditions:

For functions that are no longer affected by IGNORE_SPACE as of MySQL 5.1.13, that strategy no longer works. Either of the following approaches can be used if you have code that is subject to the preceding incompatibility:

(Bug #21114)

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)

Binary distributions of MySQL 5.1.12 were built without support for partitioning. This has been corrected except for NetWare. (Bug #23949)

A change in the interfaces for the INFORMATION_SCHEMA.FILES table has made the table accessible to storage engines other than NDB. (Bug #23013)

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_upgrade now passes all the parameters specified on the command line to both mysqlcheck and mysql using the upgrade_defaults file. (Bug #20100)

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 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)

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)

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)

M % 0 returns NULL, but (M % 0) IS NULL evaluated to false. (Bug #23411)

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)

Note: A side effect of this fix is that if you have already created such routines, and error will occur if you execute SHOW CREATE PROCEDURE or SHOW CREATE FUNCTION. You should drop these routines because they are erroneous.

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)

mysql did not check for errors when fetching data during result set printing. (Bug #22913)

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)

The column default value in the output from SHOW COLUMNS or SELECT FROM INFORMATION_SCHEMA.COLUMNS was truncated to 64 characters. (Bug #23037)

For not-yet-authenticated connections, the Time column in SHOW PROCESSLIST was a random value rather than NULL. (Bug #23379)

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)

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)

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)

Range searches on columns with an index prefix could miss records. (Bug #20732)

With SQL_MODE=TRADITIONAL, MySQL incorrectly aborted on warnings within stored routines and triggers. (Bug #20028)

In mysql, invoking connect or \r with very long db_name or host_name parameters caused buffer overflow. (Bug #20894)

mysqldump --xml produced invalid XML for BLOB data. (Bug #19745)

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)

DELETE IGNORE could hang for foreign key parent deletes. (Bug #18819)

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)

The value of the warning_count system variable was not being calculated correctly (also affecting SHOW COUNT(*) WARNINGS). (Bug #19024)

InnoDB showed substandard performance with multiple queries running concurrently. (Bug #15815)

There was a race condition in the InnoDB fil_flush_file_spaces() function. (Bug #24098)

FROM_UNIXTIME() did not accept arguments up to POWER(2,31)-1, which it had previously. (Bug #9191)

Some yaSSL-related memory leaks detected by Valgrind were fixed. (Bug #23981)

If COMPRESS() returned NULL, subsequent invocations of COMPRESS() within a result set or within a trigger also returned NULL. (Bug #23254)

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)

The return value from my_seek() was ignored. (Bug #22828)

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)

Column names were not quoted properly for replicated views. (Bug #19736)

InnoDB used table locks (not row locks) within stored functions. (Bug #18077)

InnoDB crashed when trying to display an error message about a foreign key constraint violation when the two tables are in different schemas. (Bug #23368)

Statements such as DROP PROCEDURE and DROP VIEW were written to the binary log too late due to a race condition. (Bug #14262)

At shutdown, Instance Manager told guarded server instances to stop, but did not wait until they actually stopped. (Bug #17486)

It was not possible to do an atomic rename of the log tables without the possibility of losing rows. Now you can do this:

USE mysql;
CREATE TABLE IF NOT EXISTS general_log2 LIKE general_log;
RENAME TABLE general_log TO general_log_backup, general_log2 TO general_log;

(Bug #17544, Bug #21785)

NDB Cluster (Disk Data): In the event of an aborted multiple update, the space in the Disk Data log buffer to be freed as a result was actually freed twice, which could eventually lead to a crash. (Bug #23430)

NDB Cluster: An NDB source file included a memset() call with reversed arguments. (Bug #23169)

NDB Cluster: Under some conditions, the data distribution could become unbalanced in a MySQL Cluster with 2 or more node groups following the creation of a new table. (Bug #21690)

As part of the fix for this bug, two new NDB API methods were added to the NdbDictionary::Object::Table class. See the MySQL Cluster API documentation for details.

Incorrect warnings occurred for use of CREATE TABLE ... LIKE or REPAIR TABLE with the log tables. (Bug #21966)

MySQL failed to build on the Alpha platform. (Bug #23256)

The optimizer failed to use equality propagation for BETWEEN and IN predicates with string arguments. (Bug #22753)

The optimizer used the ref join type rather than eq_ref for a simple join on strings. (Bug #22367)

The WITH CHECK OPTION for a view failed to prevent storing invalid column values for UPDATE statements. (Bug #16813)

A literal string in a GROUP BY clause could be interpreted as a column name. (Bug #14019)

Some queries that used MAX() and GROUP BY could incorrectly return an empty result. (Bug #22342)

WITH ROLLUP could group unequal values. (Bug #20825)

Use of a subquery that invoked a function in the column list of the outer query resulted in a memory leak. (Bug #21798)

LIKE searches failed for indexed utf8 character columns. (Bug #20471)

FLUSH INSTANCES in Instance Manager triggered an assertion failure. (Bug #19368)

ALTER TABLE was not able to rename a view. (Bug #14959)

The optimizer sometimes mishandled R-tree indexes for GEOMETRY data types, resulting in a server crash. (Bug #21888)

An unhandled NULL pointer caused a server crash. (Bug #22138)

Use of SQL_BIG_RESULT did not influence the sort plan for query execution. (Bug #22781)

The server did not allocate sufficient memory for some queries for which a DISTINCT to GROUP BY conversion is possible and an ORDER BY clause is present, resulting in a server crash. (Bug #20503)

The range analysis optimizer did not take into account predicates for which an index could be used after reading const tables. In some cases this resulted in non-optimal execution plans. (Bug #19579)

Entries in the slow query log could have an incorrect Rows_examined value. (Bug #12240)

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)

OPTIMIZE TABLE with myisam_repair_threads > 1 could result in MyISAM table corruption. (Bug #8283)

NDB Cluster: Restoring a cluster failed if there were any tables with 128 or more columns. (Bug #23494, Bug #23502)

NDB Cluster: Cluster backups would fail when there were more than 2048 schema objects in the cluster. (Bug #23499)

NDB 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)

NDB Cluster: INSERT ... ON DUPLICATE KEY UPDATE on an NDB table could lead to deadlocks and memory leaks. (Bug #23200)

NDB 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)

NDB Cluster: Multiple node restarts in rapid succession could cause a system restart to fail (Bug #22892), or induce a race condition (Bug #23210).

NDB Cluster: Attempting to create a unique constraint with USING HASH on an NDB table caused mysqld to crash. (Bug #21873)

NDB 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)

NDB 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 the result. (Bug #20446)

NDB Cluster: Aborting a cluster backup too soon after starting it caused a forced shutdown of the data nodes. (Bug #19148)

Incompatible change: Support for the BerkeleyDB (BDB) engine has been dropped from this release. Any existing tables that are in BDB format will not be readable from within MySQL from 5.1.12 or newer. You should convert your tables to another storage engine before upgrading to 5.1.12.

Incompatible change: The namespace for scheduled events has changed, such that events are no longer unique to individual users. This also means that a user with the EVENT privilege on a given database can now view, alter, or drop any events defined on that database.

If you used scheduled events in an earlier MySQL 5.1 release, you should rename any of them having the same name and defined on the same database but belonging to different users — so that all events in a given database have unique names — before upgrading to 5.1.12 (or newer).

For additional information, see 「The Event Scheduler and MySQL Privileges」.

Incompatible change: The permitted values for and behaviour of the event_scheduler system variable have changed. Permitted values are now ON, OFF, and DISABLED, with OFF being the default. It is not possible to change its value to or from DISABLED while the server is running.

For details, see 「Event Scheduler Overview」.

Incompatible change: The plugin interface has changed: The st_mysql_plugin structure has a new license member to indicate the license type. (The allowable values are defined in mysql/plugin.h.) This change is not backward compatible, so the API version (MYSQL_PLUGIN_INTERFACE_VERSION) has changed. For additional information, see 「Writing Plugins」.

Incompatible change: The full-text parser plugin interface has changed in two ways:

These changes are not backward compatible, so the API version (MYSQL_FTPARSER_INTERFACE_VERSION) has changed. For additional information, see 「Writing Plugins」.

Incompatible change: In the INFORMATION_SCHEMA.EVENTS table, the EVENT_DEFINITION column now contains the SQL executed by a scheduled event.

The EVENT_BODY column now contains the language used for the statement or statements shown in EVENT_DEFINITION. In MySQL 5.1, the value shown in EVENT_BODY is always SQL.

These changes were made to bring this table into line with the INFORMATION_SCHEMA.ROUTINES table, and that table's ROUTINE_BODY and ROUTINE_DEFINITION columns. (Bug #16992)

Incompatible change: MySQL Cluster node and system restarts formerly required that all fragments use the same local checkpoint (LCP); beginning with this version, it is now possible for different fragments to use different LCPs during restarts. This means that data node filesystems must be rebuilt as part of any upgrade to this version by restarting all data nodes with the --initial option. (Bug #21271, Bug #21478)

See 「クラスタのアップグレードおよびダウングレードの互換性」, and related sections of the Manual before upgrading a MySQL Cluster to version 5.1.12 or later.

Incompatible change: A number of MySQL constructs are now prohibited in partitioning expressions, beginning with this release. These include:

These restrictions were added in part as a result of Bug #18198 and related bug reports.

For more information about these and other restrictions on partitioned tables in MySQL, see 「パーティショニングの制約と制限」.

Binary MySQL distributions no longer include a mysqld-max server. Instead, distributions contain a binary that includes the features previously included in the mysqld-max binary.

The default binary log format (as used during replication) is now Mixed based, automatically using a combination of row-based and statement based log events as appropriate.

The general query log and slow query logs now can be enabled or disabled at runtime with the general_log and slow_query_log system variables, and the name of the log files can be changed by setting the general_log_file and slow_query_log_file system variables. See 「一般クエリ ログ」, and 「スロー クエリ ログ」.

The output generated by the server when using the --xml option has changed with regard to null values. It now matches the output from mysqldump --xml. That is, a column containing a NULL value is now reported as

<field name="column_name" xsi:nil="true" />

whereas a column containing the string value 'NULL' is reported as

<field name="column_name">NULL</field>

and a column containing an empty string is reported as

<field name="column_name">>/field>

(Bug #21263)

The following statements now can be executed as prepared statements (using PREPARE plus EXECUTE):

CACHE INDEX
CHANGE MASTER
CHECKSUM {TABLE | TABLES}
{CREATE | RENAME | DROP} DATABASE
{CREATE | RENAME | DROP} USER
FLUSH {TABLE | TABLES | TABLES WITH READ LOCK | HOSTS | PRIVILEGES
  | LOGS | STATUS | MASTER | SLAVE | DES_KEY_FILE | USER_RESOURCES}
GRANT
REVOKE
KILL
LOAD INDEX INTO CACHE
RESET {MASTER | SLAVE | QUERY CACHE}
SHOW BINLOG EVENTS
SHOW CREATE {PROCEDURE | FUNCTION | EVENT | TABLE | VIEW}
SHOW {AUTHORS | CONTRIBUTORS | WARNINGS | ERRORS}
SHOW {MASTER | BINARY} LOGS
SHOW {MASTER | SLAVE} STATUS
SLAVE {START | STOP}
INSTALL PLUGIN
UNINSTALL PLUGIN

(Bug #20665)

The Instance Manager --passwd option has been renamed to --print-password-line. Other options were added to enable management of the IM password file from the command line: --add-user, --drop-user, --edit-user, --list-users, --check-password-file, --clean-password-file, --username, and --password. The --mysql-safe-compatible option was added to cause the Instance Manner to act similarly to mysqld_safe.

On Windows, typing Control-C caused the mysql client to crash. Now it causes mysql to attempt to kill the current statement. If this cannot be done, or Control-C is typed again before the statement is killed, mysql exits. (Bug#17926; see also Bug #1989)

TEXT and BLOB columns do not support DEFAULT values. However, when a default of '' was specified, the specification was silently ignored. This now results in a warning, or an error in strict mode. (Bug #19498)

The mysql client now allows \l in the prompt command argument to insert the current delimiter into the prompt. (Bug #14448)

Log table changes: By default, the log tables use the CSV storage engine, as before. But now the log tables can be altered to use the MyISAM storage engine. You cannot use ALTER TABLE to alter a log table that is in use. The log must be disabled first. No engines other than CSV or MyISAM are legal for the log tables. The use of DROP TABLE for log tables is similarly restricted: It cannot be used to drop a log table that is in use. The log must be disabled first. (These changes also correct a deadlock that occurred for an attempt to drop an in-use log table.) (Bug #18559)

The LEFT() and RIGHT() functions return NULL if any argument is NULL. (Bug #11728)

EXPLAIN EXTENDED now shows a filtered column that is an estimated percentage of the examined rows that will be joined with the previous tables. (Bug #14940)

For mysqlshow, if a database name argument contains wildcard characters (such as ‘_’) but matches a single database name exactly, treat the name as a literal name. This allows a command such as mysqlshow information_schema work without having to escape the wildcard character. (Bug #19147)

If a DROP VIEW statement named multiple views, it stopped with an error if a non-existent view was named and did not drop the remaining views. Now it continues on and reports an error at the end, similar to DROP TABLE. (Bug #16614)

SHOW CREATE TABLE now shows constraints for InnoDB tables. (Bug #16614)

Added the --set-charset option to mysqlbinlog to allow the character set to be specified for processing binary log files. (Bug #18351)

NDB Cluster: Backup messages are no longer printed to the Cluster log.

NDB 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)

NDB Cluster: Inserting into an NDB table failed when the table had no primary key but had a unique key added after table was created on one or more NOT NULL columns. This occurred when the unique key had been adding using either ALTER TABLE or CREATE UNIQUE KEY. (Bug #22838)

NDB Cluster: The ndb_config utility now accepts -c as a short form of the --ndb-connectstring option. (Bug #22295)

NDB Cluster: Added the --bind-address option for ndbd. This allows a data node process to be bound to a specific network interface. (Bug #22195)

NDB Cluster: The Ndb_number_of_storage_nodes system variable was renamed to Ndb_number_of_data_nodes. (Bug #20848)

Added the --ndb-use-copying-alter-table option to mysqld to provide a fallback in case of problems with online ALTER TABLE operations on NDBCluster tables.

Added the SHOW CONTRIBUTORS statement.

It is no longer possible to create partitioned tables using the CSV storage engine.

NDB Cluster: The status variables Ndb_connected_host and Ndb_connected_port were renamed to Ndb_config_from_host and Ndb_config_from_port, respectively.

NDB Cluster: A number of erroneous, misleading, or missing error messages have been corrected. (Bug #17297 & Bug #19543)

NDB Cluster: It is no longer possible to create Cluster tables using any partitioning type other than [LINEAR] KEY. Attempting to do so now raises an error.

The ExtractValue() function now produces an error when passed an XML fragment that is not well-formed. (Bug #18201)

(Previously, the function allowed invalid XML fragments to be used.)

There were several issues regarding how SHOW STATUS affected some status variables and logging which could impact monitoring the MySQL Server. The behavior of this statement has been modified in two ways:

However, SHOW STATUS continues to update global status variables to allow monitoring of what the server is actually doing. This is because SHOW STATUS creates temporary tables that may affect performance if it is called excessively often. (Bug #10210, Bug #19764)

The mysqldumpslow script has been moved from client RPM packages to server RPM packages. This corrects a problem where mysqldumpslow could not be used with a client-only RPM install, because it depends on my_print_defaults which is in the server RPM. (Bug #20216)

The bundled yaSSL library was upgraded to version 1.3.7.

The bundled yaSSL library licensing has added a FLOSS exception similar to MySQL to resolve licensing incompatibilities with MySQL. (See the extra/yassl/FLOSS-EXCEPTIONS file in a MySQL source distribution for details.) (Bug #16755)

mysqlslap threads now try to connect up to 10 times if the initial connect attempt fails. (Bug #21297)

For a successful dump, mysqldump now writes a SQL comment to the end of the dump file in the following format:

-- Dump completed on YYYY-MM-DD hh:mm:ss

(Bug #10877)

The mysqld and mysqlmanager manpages have been reclassified from volume 1 to volume 8. (Bug #21220)

In the INFORMATION_SCHEMA.ROUTINES table the ROUTINE_DEFINITION column now is defined as NULL rather than NOT NULL. Also, NULL rather than the empty string is returned as the column value if the user does not have sufficient privileges to see the routine definition. (Bug #20230)

configure now defines the symbol DBUG_ON in config.h to indicate whether the source tree is configured to be compiled with debugging support. (Bug #19517)

The MySQL distribution now compiles on UnixWare 7.13. (Bug #20190)

The mysql client used the default character set if it automatically reconnected to the server, which is incorrect if the character set had been changed. To enable the character set to remain synchronized on the client and server, the mysql command charset (or \C) that changes the default character set and now also issues a SET NAMES statement. The changed character set is used for reconnects. (Bug #11972)

The STATE column of the INFORMATION_SCHEMA.PROCESSLIST table was increased from 30 to 64 characters to accommodate longer state values. (Bug #21652)

TIMESTAMP columns that are NOT NULL now are reported that way by SHOW COLUMNS and INFORMATION_SCHEMA. (Bug #20910)

INFORMATION_SCHEMA contains new tables, GLOBAL_STATUS, SESSION_STATUS, GLOBAL_VARIABLES, and SESSION_VARIABLES, that correspond to the output from the SHOW {GLOBAL|SESSION} STATUS and SHOW {GLOBAL|SESSION} VARIABLES statements.

The BINARY keyword now is forbidden as a data type attribute in stored routines (for example, DECLARE v1 VARCHAR(25) BINARY), because DECLARE does not support collations, and in this context BINARY specifies the binary collation of the variable's character set. (Bug #20701)

The source distribution has been updated so that the UDF example can be compiled under Windows with CMake. See 「Compiling and Installing User-Defined Functions」. (Bug #19121)

LOAD DATA INFILE no longer causes an implicit commit for all storage storage engines. It now causes an implicit commit only for tables using the NDB storage engine. (Bug #11151)

The LOAD DATA FROM MASTER and LOAD TABLE FROM MASTER statements are deprecated. See 「LOAD DATA FROM MASTER 構文」, for recommended alternatives. (Bug #18822, Bug #9125, Bug #12187, Bug #14399, Bug #15025, Bug #20596)

mysqldump now has a --flush-privileges option. It causes mysqldump to emit a FLUSH PRIVILEGES statement after dumping the mysql database. This option should be used any time the dump contains the mysql database and any other database that depends on the data in the mysql database for proper restoration. (Bug #21424)

The default value of the tmp_table_size system variable was lowered from 32MB to 16MB because it is bounded by the value of max_heap_table_size, which has a default of 16MB. (Bug #18875)

The number of InnoDB threads is no longer limited to 1,000 on Windows. (Bug #22268)

Memory consumption of the InnoDB data dictionary cache was roughly halved by cleaning up the data structures. (Bug #20877)

Using --with-debug to configure MySQL with debugging support enables you to use the --debug="d,parser_debug" option when you start the server. This causes the Bison parser that is used to process SQL statements to dump a parser trace to the server's standard error output. Typically, this output is written to the error log.

A new system variable, lc_time_names, specifies the locale that controls the language used to display day and month names and abbreviations. This variable affects the output from the DATE_FORMAT(), DAYNAME() and MONTHNAME() functions. See 「MySQL サーバのローケル サポート」.

Security fix: On Linux, and possibly other platforms using case-sensitive filesystems, it was possible for a user granted rights on a database to create or access a database whose name differed only from that of the first by the case of one or more letters. (CVE-2006-4226, Bug #17647)

Security fix: If a user has access to MyISAM table t, that user can create a MERGE table m that accesses t. However, if the user's privileges on t are subsequently revoked, the user can continue to access t by doing so through m. If this behavior is undesirable, you can start the server with the new --skip-merge option to disable the MERGE storage engine. (Bug #15195)

Security fix: A stored routine created by one user and then made accessible to a different user using GRANT EXECUTE could be executed by that user with the privileges of the routine's definer. (CVE-2006-4227, Bug #18630)

Incompatible change: For utf8 columns, the full-text parser incorrectly considered several non-word punctuation and whitespace characters as word characters, causing some searches to return incorrect results. (Bug #19580)

The fix involves a change to the full-text parser, so any tables that have FULLTEXT indexes on utf8 columns must be repaired with REPAIR TABLE:

REPAIR TABLE tbl_name QUICK;

An invalid GRANT statement for which Ok was returned on a replication master caused an error on the slave and replication to fail. (Bug #6774)

InnoDB locking was improved by removing a gap lock for the case that you try to delete the same row twice within a transaction. (Bug #13544)

Deleting entries from a large MyISAM index could cause index corruption when it needed to shrink. Deletes from an index can happen when a record is deleted, when a key changes and must be moved, and when a key must be un-inserted because of a duplicate key. This can also happen in REPAIR TABLE when a duplicate key is found and in myisamchk when sorting the records by an index. (Bug #22384)

Setting myisam_repair_threads caused any repair operation on a MyISAM table to fail to update the cardinality of indexes, instead making them always equal to 1. (Bug #18874)

ALTER EVENT statements including only a COMMENT clause failed with a syntax error on two platforms: Linux for S/390, and OS X 10.4 for 64-bit PPC. (Bug #23423)

For row-based replication, log rotation could occur at an improper time. (Bug #21474)

For row-based replication, the BINLOG command did not lock tables properly, causing a crash for some table types. (Bug #19459)

The parser rejected queries that selected from a table twice using a UNION within a subquery. The parser now supports arbitrary subquery, join, and parenthesis operations within EXISTS subqueries. A limitation still exists for scalar subqueries: If the subquery contains UNION, the first SELECT of the UNION cannot be within parentheses. For example, SELECT (SELECT a FROM t1 UNION SELECT b FROM t2) will work, but SELECT ((SELECT a FROM t1) UNION (SELECT b FROM t2)) will not. (Bug #14654)

Incorrect type aggregation for IN and CASE expressions could lead to an incorrect result. (Bug #18360)

When using row based replication, a CREATE TABLE...SELECT statement would be replicated, even if the table creation failed on the master (for example, due to a duplicate key failure). (Bug #20265)

The optimizer did not take advantage of indexes on columns used for the second or third arguments of BETWEEN. (Bug #18165)

Subqueries with aggregate functions but no FROM clause could return incorrect results. (Bug #21540)

The CSV storage engine failed to detect some table corruption. (Bug #22080)

For multiple-table UPDATE statements, storage engines were not notified of duplicate-key errors. (Bug #21381)

Successive invocations of a COUNT(*) query containing a join on two MyISAM tables and a WHERE clause of the form WHERE (table1.column1 = table2.column2) OR table2.column2 IS NULL yielded different results. (Bug #21019)

It was possible to provide the ExtractValue() function with input containing 「tags」 that were not valid XML; for example, it was possible to use tag names beginning with a digit, which are disallowed by the W3C's XML 1.0 specification. Such cases caused the function to return 「junk」 output rather than an error message signalling the user as to the true nature of the problem. (Bug #20854)

The presence of a subquery in the ON clause of a join in a view definition prevented the MERGE algorithm from being used for the view in cases where it should be allowed. (Bug #21646)

BIT columns were not replicated properly under row-based replication. (Bug #22550)

Conversion of values inserted into a BIT column could affect adjacent columns. (Bug #22271)

The URL into the online manual that is printed in the stack trace message by the server was out of date. (Bug #21449)

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)

PROCEDURE ANALYSE() returned incorrect values of M FLOAT(M, D) and DOUBLE(M, D). (Bug #20305)

Join conditions using partial indexes on utf8 columns of InnoDB tables incorrectly ignored rows where the length of the actual value was greater than the length of the partial index. (Bug #19960)

On an INSERT into an updatable but non-insertable view, an error message was issued stating that the view was not updatable. Now the message says the view is not insertable-into. (Bug #5505)

INSERT DELAYED did not honor SET INSERT_ID or the auto_increment_* system variables. (Bug #20627, Bug# 20830)

For character sets having a mbmaxlen value of 2, any ALTER TABLE statement changed TEXT columns to MEDIUMTEXT. (Bug #21620)

A query that used GROUP BY and an ALL or ANY quantified subquery in a HAVING clause could trigger an assertion failure. (Bug #21853)

For an ENUM column that used the ucs2 character set, using ALTER TABLE to modify the column definition caused the default value to be lost. (Bug #20108)

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)

A loaded storage engine plugin did not load after a server restart. (Bug #21610)

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)

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)

mysql_com.h unnecessarily referred to the ulong type. (Bug #22227)

Incorporated some portability fixes into the definition of __attribute__ in my_global.h. (Bug #2717)

Linking the pthreads library to single-threaded MySQL libraries caused dlopen() to fail at runtime on HP-UX. (Bug #18267)

Loading a plugin caused any an existing plugin with the same name to be lost. (Bug #20615)

In the package of pre-built time zone tables that is available for download at http://dev.mysql.com/downloads/timezones.html, the tables now explicitly use the utf8 character set so that they work the same way regardless of the system character set value. (Bug #21208)

The build process incorrectly tried to overwrite sql/lex_hash.h. This caused the build to fail when using a shadow link tree pointing to original sources that were owned by another account. (Bug #18888)

mysql_ftdump produced bad counts for common words. (Bug #22326)

The optimizer could make an incorrect index choice for indexes with a skewed key distribution. (Bug #22393)

When records are merged from the insert buffer and the page needs to be reorganized, InnoDB used incorrect column length information when interpreting the records of the page. This caused a server crash due to apparent corruption of secondary indexes in ROW_FORMAT=COMPACT that contain prefix indexes of fixed-length columns. Data files should not be corrupted, but the crash was likely to repeat every time the server was restarted. (Bug #21638)

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)

Using GROUP_CONCAT() on the result of a subquery in the FROM clause that itself used GROUP_CONCAT() could cause a server crash. (Bug #22015)

Instance Manager had a race condition involving mysqld PID file removal. (Bug #22379)

Execution of a prepared statement that uses an IN subquery with aggregate functions in the HAVING clause could cause a server crash. (Bug #22085)

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)

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)

make install tried to build files that should already have been built by make all, causing a failure if installation was performed using a different account than the one used for the initial build. (Bug #19738)

The source distribution would not build on Windows due to a spurious dependency on ib_config.h. (Bug #22224)

It was possible for a stored routine with a non-latin1 name to cause a stack overrun. (Bug #21311)

The server returns a more informative error message when it attempts to open a MERGE table that has been defined to use non-MyISAM tables. (Bug #10974)

Within stored routines, some error messages were printed incorrectly. A non-null-terminated string was passed to a message-printing routine that expected a null-terminated string. (Bug #20778)

SUBSTR() results sometimes were stored improperly into a temporary table when multi-byte character sets were used. (Bug #20204)

Certain malformed INSERT statements could crash the mysql client. (Bug #21142)

EXPLAIN EXTENDED now shows a filtered column that is an estimated percentage of the examined rows that will be joined with the previous tables. This was added while dealing with a problem of MySQL choosing the wrong index for some queries. (Bug #14940)

On Mac OS X, zero-byte read() or write() calls to an SMB-mounted filesystem could return a non-standard return value, leading to data corruption. Now such calls are avoided. (Bug #12620)

With TRADITIONAL SQL mode, assignment of out-of-bound values and rounding of assigned values was done correctly, but assignment of the same numbers represented as strings sometimes was handled differently. (Bug #6147)

The source distribution failed to compile when configured with the --without-geometry option. (Bug #12991)

The source distribution failed to compile when configured with the --with-libwrap option. (Bug #18246)

The feature of being able to recover a temporary table named #sql_id in InnoDB by creating a table named rsql_id_recover_innodb_tmp_table was broken by the introduction of the new identifier encoding in MySQL 5.1.6 (Bug #21313)

ALTER EVENT in the body of a stored procedure led to a crash when the procedure was called. This affected only those ALTER EVENT statements which changed the interval of the event. (Bug #22397)

A DATE can be represented as an integer (such as 20060101) or as a string (such as '2006.01.01'). When a DATE (or TIME) column is compared in one SELECT against both representations, constant propagation by the optimizer led to comparison of DATE as a string against DATE as an integer. This could result in integer comparisons such as 2006 against 20060101, erroneously producing a false result. (Bug #21475)

When a statement used a stored function that inserted into an AUTO_INCREMENT column, the generated AUTO_INCREMENT value was not written into the binary log, so a different value could in some cases be inserted on the slave. (Bug #20341)

A stored procedure that used LAST_INSERT_ID() did not replicate properly using statement-based binary logging. (Bug #20339)

Use of the --no-pager option caused mysql to crash. (Bug #19363)

For INSERT ... ON DUPLICATE KEY UPDATE, use of VALUES(col_name) within the UPDATE clause sometimes was handled incorrectly. (Bug #21555)

When event_scheduler was set to DISABLED, its value was not displayed correctly by SHOW VARIABLES or SELECT @@global.event_scheduler. (Bug #22662)

Row equalities (such as WHERE (a,b) = (c,d) were not taken into account by the optimizer, resulting in slow query execution. Now they are treated as conjunctions of equalities between row elements. (Bug #16081)

If the binary logging format was changed between the times when a locked table was modified and when it was unlocked, the binary log contents were incorrect. (Bug #20863)

Column names supplied for a view created on a master server could be lost on a slave server. (Bug #19419)

For a MyISAM table locked with LOCK TABLES ...WRITE, queries optimized using the index_merge method did not show rows inserted with the lock in place. (Bug #20256)

Table aliases in multiple-table DELETE statements sometimes were not resolved. (Bug #21392)

A query result could be sorted improperly when using ORDER BY for the second table in a join. (Bug #21302)

The --collation-server server option was being ignored. With the fix for this problem, if you choose a non-default character set with --character-set-server, you should also use --collation-server to specify the collation. (Bug #15276)

A function result in a comparison was replaced with a constant by the optimizer under some circumstances when this optimization was invalid. (Bug #21698)

A subquery that uses an index for both the WHERE and ORDER BY clauses produced an empty result. (Bug #21180)

If the auto_increment_offset setting causes MySQL to generate a value larger than the column's maximum possible value, the INSERT statement is accepted in strict SQL mode, whereas but should fail with an error. (Bug #20573)

Queries containing a subquery that used aggregate functions could return incorrect results. (Bug #16792)

Row-based replication failed when the query cache was enabled on the slave. (Bug #17620)

The index_merge/Intersection optimizer could have a memory overrrun when the number of table columns covered by an index is sufficiently large, possibly resulting in a server crash. (Bug #16201)

The MD5(), SHA1(), and ENCRYPT() functions should return a binary string, but the result sometimes was converted to the character set of the argument. MAKE_SET() and EXPORT_SET() now use the correct character set for their default separators, resulting in consistent result strings which can be coerced according to normal character set rules. (Bug #20536)

EXPLAIN sometimes returned an incorrect select_type for a SELECT from a view, compared to the select_type for the equivalent SELECT from the base table. (Bug #5500)

An InnoDB mutex was not aquired and released under the same condition, leading to deadlock in some rare situations involving XA transactions. (Bug #21833)

With row-based replication, replicating a statement to a slave where the table had additional columns relative to the master table did not work. (Bug #19069)

For a MyISAM table with a FULLTEXT index, compression with myisampack or a check with myisamchk after compression resulted in table corruption. (Bug #19702)

With max_sp_recursion set to 0, a stored procedure that executed a SHOW CREATE PROCEDURE statement for itself triggered a recursion limit exceeded error, though the statement involves no recursion. (Bug #21416)

mysqldump did not add version-specific comments around WITH PARSER and TABLESPACE ... STORAGE DISK clauses for CREATE TABLE statements, causing the dump file to fail when loaded into older servers. (Bug #20841)

BIN(), OCT(), and CONV() did not work with BIT values. (Bug #15583)

The optimizer could produce an incorrect result after AND with collations such as latin1_german2_ci, utf8_czech_ci, and utf8_lithianian_ci. (Bug #9509)

The server could crash for the second execution of a function containing a SELECT statement that uses an aggregating IN subquery. (Bug #21493)

UPGRADE was treated as a reserved word, although it is not. (Bug #21772)

Database and table names have a maximum length of 64 characters (even if they contain multi-byte characters), but were being truncated to 64 bytes. (Bug #21432)

Usernames have a maximum length of 16 characters (even if they contain multi-byte characters), but were being truncated to 16 bytes. (Bug #20393)

A query could produce different results with and without and index, if the WHERE clause contained a range condition that used an invalid DATETIME constant. (Bug #16249)

COUNT(*) queries with ORDER BY and LIMIT could return the wrong result. (Bug #21787)

Note: This problem was introduced by the fix for Bug #9676, which limited the rows stored in a temporary table to the LIMIT clause. This optimization is not applicable to non-group queries with aggregate functions. The current fix disables the optimization in such cases.

Memory overruns could occur for certain kinds of subqueries. (Bug #21477)

Adding ORDER BY to a SELECT DISTINCT(expr) query could produce incorrect results. (Bug #21456)

Memory used by scheduled events was not freed when the events were dropped. (Bug #18683)

A scheduled event that took longer to execute than the length of time scheduled between successive executions could 「skip」 executions. For example, an event defined with EVERY 1 SECOND — but which required longer than 1 second to complete — might be executed only once every 2 seconds. (Bug #16417)

When used in the DO clause of a CREATE EVENT statement, the statements CREATE EVENT, CREATE FUNCTION, and CREATE PROCEDURE caused the server to crash. (These statements are not permitted inside CREATE EVENT.) (Bug #16409, Bug #18896)

A subselect used in the ON SCHEDULE clause of a CREATE EVENT or ALTER EVENT statement caused the server to crash, rather than producing an error as expected. (Bug #16394)

mysql displayed an empty string for NULL values. (Bug #21618)

mysql_upgrade produced a malformed upgrade_defaults file by overwriting the [client] group header with a password option. This prevented mysqlcheck from running successfully when invoked by mysql_upgrade. (Bug #21011)

mysql_config --libmysqld-libs did not produce any SSL options necessary for linking libmysqld with SSL support enabled. (Bug #21239)

yaSSL had a conflicting definition for socklen_t on hurd-i386 systems. (Bug #22326)

On Windows, inserting into a MERGE table after renaming an underlying MyISAM table caused a server crash. (Bug #20789)

character_set_results can be NULL to signify 「no conversion,」 but some code did not check for NULL, resulting in a server crash. (Bug #21913)

If a partitioned InnoDB table contained an AUTO_INCREMENT column, a SHOW statement could cause an assertion failure with more than one connection. (Bug #20493)

Running InnoDB with many concurrent threads could cause memory corruption and a seg fault due to a bug introduced in MySQL 5.1.11. (Bug #20213)

Using DROP TABLE with concurrent queries causes mysqld to crash. (Bug #21784)

The ExtractValue() function did not accept XML tag names containing a period (.) character. (Bug #20795)

For table-format output, mysql did not always calculate columns widths correctly for columns containing multi-byte characters in the column name or contents. (Bug #17939)

Identifiers with embedded escape characters were not handled correctly by some SHOW statements due to some old code that was doing some extra unescaping. (Bug #19874)

InnoDB was slow with more than 100,000 .idb files. (Bug #21112)

SHOW INNODB STATUS contained some duplicate output. (Bug #21113)

After an INSERT ... ON DUPLICATE KEY UPDATE statement that updated an existing row, LAST_INSERT_ID() could return a value not in the table. (Bug #11460)

Selecting from INFORMATION_SCHEMA.FILES could crash the server. (Bug #21676)

Using cursors with READ COMMITTED isolation level could cause InnoDB to crash. (Bug #19834)

A server or network failure with an open client connection would cause the client to hang even though the server was no longer available. (Bug #9678)

Using ALTER TABLE ... REORGANIZE PARTITIONS to reduce the number of subpartitions to 1 caused the server to crash. (Bug #21210)

NDB 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)

NDB 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. Now, if such a table is encountered during autodiscovery, a warning is written to the error log of the affected mysqld, and the local table is overwritten. (Bug #21378)

NDB Cluster (NDB API): Inacivity timeouts for scans were not correctly handled. (Bug #23107)

NDB Cluster (NDB API): Attempting to read a nonexistent tuple using Commit mode for NdbTransaction::execute() caused node failures. (Bug #22672)

NDB Cluster (NDB API): The inclusion of my_config.h in NdbApi.h required anyone wishing to write NDB API applications against MySQL 5.1 to have a complete copy of the 5.1 sources. (Bug #21253)

NDB Cluster (NDB API): The NdbOperation::getBlobHandle() method, when called with the name of a nonexistent column, caused a segmentation fault. (Bug #21036)

NDB Cluster: The --help output from NDB binaries did not include file-related options. (Bug #21994)

NDB 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)

NDB 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)

NDB 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)

Note: We recommend values for NumberOfReplicas that are even powers of 2, for best results.

NDB Cluster: The ndb_mgm management client did not set the exit status on errors, always returning 0 instead. (Bug #21530)

NDB Cluster: Cluster logs were not rotated following the first rotation cycle. (Bug #21345)

NDB Cluster: Condition pushdown did not work correctly with DATETIME columns. (Bug #21056)

NDB Cluster: Under some circumstances, local checkpointing would hang, keeping any unstarted nodes from being started. (Bug #20895)

NDB Cluster: Using an invalid node ID with the management client STOP command could cause ndb_mgm to hang. (Bug #20575)

NDB Cluster: In some cases where SELECT COUNT(*) from an NDB table should have yielded an error, MAX_INT was returned instead. (Bug #19914)

NDB Cluster: Following the restart of an MGM node, the Cluster management client did not automatically reconnect. (Bug #19873)

NDB 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)

NDB Cluster: ndb_restore did not always make clear that it had recovered successfully from temporary errors while restoring a cluster backup. (Bug #19651)

NDB Cluster: In rare situations with resource shortages, a crash could result from insufficient IndexScanOperations. (Bug #19198)

NDB Cluster: ndb_mgm -e show | head would hang after displaying the first 10 lines of output. (Bug #19047)

NDB Cluster: The error returned by the cluster when too many nodes were defined did not make clear the nature of the problem. (Bug #19045)

NDB Cluster: A problem with takeover during a system restart caused ordered indexes to be rebuilt incorrectly. This also adversely affected Cluster Replication. (Bug #15303)

NDB Cluster: Some queries involving joins on very large NDB tables could crash the MySQL server. (Bug #21059)

NDB Cluster (Disk Data): mysqldump did not back up tablespace or log file group information for Disk Data tables correctly. (Specifically, UNDO_BUFFER_SIZE and INITIAL_SIZE values were misreported.) Trying to restore from such a backup would produce error 1296 (Got error 1504 'Out of logbuffer memory' from NDB). (Bug #20809)

NDB Cluster (Disk Data): The INFORMATION_SCHEMA.FILES table showed incorrect values in the EXTENT_SIZE, FREE_EXTENTS, and TOTAL_EXTENTS columns for UNDO log files. (Bug #20073)

NDB Cluster (Disk Data): Deletes from Disk Data tables used a non-optimal scan to find the rows to be deleted, resulting in poor performance. The fix causes disk order rather than memory order to be used, and can improve performance of Disk Data deletes by up to ~300% in some cases. (Bug #17929)

NDB 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)

NDB Cluster: The message Error 0 in readAutoIncrementValue(): no Error was written to the error log whenever SHOW TABLE STATUS was performed on a Cluster table that did not have an AUTO_INCREMENT column. (Bug #21033)

NDB Cluster (Direct APIs): The storage/ndb directory was missing from the server binary distribution, making it impossible to compile NDB API and MGM API applications. This directory can be found as /usr/include/storage/ndb after installing that distribution. (Bug #21955)

NDB Cluster: ndb_size.pl and ndb_error_reporter were missing from RPM packages. (Bug #20426)

The ndb_mgm program was included in both the MySQL-ndb-tools and MySQL-ndb-management RPM packages, resulting in a conflict if both were installed. Now ndb_mgm is included only in MySQL-ndb-tools. (Bug #21058)

libmysqld produced some warnings to stderr which could not be silenced. These warnings now are suppressed. (Bug #13717)

If a column definition contained a character set declaration, but a DEFAULT value began with an introducer, the introducer character set was used as the column character set. (Bug #20695)

If a query had a condition of the form tableX.key = tableY.key, which participated in equality propagation and also was used for ref access, then early ref-access NULL filtering was not peformed for the condition. This could make query execution slower. (Bug #19649)

The optimizer sometimes produced an incorrect row-count estimate after elimination of const tables. This resulted in choosing extremely inefficient execution plans in same cases when distribution of data in joins were skewed. (Bug #21390)

Query results could be incorrect if the WHERE clause contained t.key_part NOT IN (val_list), where val_list is a list of more than 1000 constants. (Bug #21282)

STR_TO_DATE() sometimes would return NULL if the %D format specifier was not the last specifier in the format string. (Bug #20987)

On Windows, a definition for mysql_set_server_option() was missing from the C client library. (Bug #16513)

The myisam_stats_method variable was mishandled when set from an option file or on the command line. (Bug #21054)

The optimizer assumed that if (a=x AND b=x) is true, (a=x AND b=x) AND a=b is also true. But that is not always so if a and b have different data types. (Bug #21159)

InnoDB did not honor IGNORE INDEX, which prevented using IGNORE INDEX in cases where an index sort would be slower than a filesort. (Bug #21174)

For connections that required a SUBJECT value, a check was performed to verify that the value was correct, but the connection was not refused if not. (Bug #20411)

Some Linux-x86_64-icc packages (of previous releases) mistakenly contained 32-bit binaries. Only ICC builds are affected, not gcc builds. Solaris and FreeBSD x86_64 builds are not affected. (Bug #22238)

INSERT ... SELECT sometimes generated a spurious Column count doesn't match value count error. (Bug #21774)

Some user-level level errors were being written to the server's error log, which is for server errors. (Bug #20402)

to the client could have an empty column name. When using tables created under MySQL 4.1 with a 5.0 server, if the tables contained VARCHAR columns, for some queries the metadata sent to the client could have an empty column name. (Bug #14897)

On 64-bit systems, use of the cp1250 character set with a primary key column in a LIKE clause caused a server crash for patterns having letters in the range 128..255. (Bug #19741)

ORDER BY RAND() LIMIT 1 always set a user variable to the last possible value from the table. (Bug #16861)

N'xxx' and _utf8'xxx' were not treated as equivalent because N'xxx' failed to unescape backslashes (\) and doubled apostrophe/single quote characters (''). (Bug #17313)

A subquery in the WHERE clause of the outer query and using IN and GROUP BY returned an incorrect result. (Bug #16255)

When NOW() was used in a BETWEEN clause of the definition for a view, it was replaced with a constant in the view. (Bug #15950)

A stored procedure with a CONTINUE handler that encountered an error continued to execute a statement that caused an error, rather with the next statement following the the one that caused the error. (Bug #8153)

libmysqlclient defined a symbol BN_bin2bn which belongs to OpenSSL. This could break applications that also linked against OpenSSL's libcrypto library. The fix required correcting an error in a build script that was failing to add rename macros for some functions. (Bug #21930)

Queries that used the index_merge and sort_union methods to access an InnoDB table could produce inaccurate results. This issue was introduced in MySQL 5.1.10 when a new handler and bitmap interface was implemented. (Bug #21277)

The SELECT privilege was required for an insert on a view, instead of the INSERT privilege. (Bug #21261)

Note: This fixes a regression that was introduced by the fix for Bug #20989.

Running SHOW MASTER LOGS at the same time as binary log files were being switched would cause mysqld to hang. (Bug #21965)

Building mysql on Windows with CMake 2.4 would fail to create libmysqld correctly. (Bug #20907)

The server's handling of the number of partitions or subpartitions specified in a PARTITIONS or SUBPARTITIONS clause was changed. Beginning with this release, the number of partitions must:

Also beginning with this version, no attempt is made to convert, truncate, or evaluate a PARTITIONS or SUBPARTITIONS value; instead, the CREATE TABLE or ALTER TABLE statement containing the PARTITIONS or SUBPARTITIONS clause now fails with an appropriate error message. (Bug #15890)

A misleading error message was displayed when attempting to define a unique key that was not valid for a partitioned table. (Bug #21862)

Errors could be generated during the execution of certain prepared statements that ran queries on partitioned tables. (Bug #21658)

Using relative paths for DATA DIRECTORY or INDEX DIRECTORY with a partitioned table generated a warning rather than an error, and caused 「junk」 files to be created in the server's data directory. (Bug #21350)

Using EXPLAIN PARTITIONS with a query on a table whose partitioning expression was based on the value of a DATE column could sometimes cause the server to crash. (Bug #21339)

Running SHOW TABLE STATUS on any InnoDB table having at least one record could crash the server. Note that this was not due to any issue in the InnoDB storage engine, but rather with AUTO_INCREMENT handling in the partitioning code — however, the table did not have to have an AUTO_INCREMENT column for the bug to manifest. (Bug #21173)

Some ALTER TABLE statements affecting a table's subpartitioning could hang. (Bug #21143)

Scheduled events that invoked stored procedures executing DDL operations on partitioned tables could crash the server. (Bug #20548)

The yaSSL library bundled with libmysqlclient had some conflicts with OpenSSL. Now macros are used to rename the conflicting symbols to have a prefix of ya. (Bug #19810)

It is possible to create MERGE tables into which data cannot be inserted (by not specifying a UNION clause. However, when an insert was attempted, the error message was confusing. Now an error occurs indicating that the table is read-only. (Bug #17766)

User-created tables having a name beginning with #sql were not visible to SHOW TABLES and could collide with internal temporary table names. Now they are not hidden and do not collide. (Bug #1405)

A NUL byte within a prepared statement string caused the rest of the string not to be written to the query log, allowing logging to be bypassed. (Bug #21813)

mysql_upgrade created temporary files in a possibly insecure way. (Bug #21224)

Some prepared statements caused a server crash when executed a second time. (Bug #21166)

With query_cache_type set to 0, RESET QUERY CACHE was very slow and other threads were blocked during the operation. Now a cache reset is faster and non-blocking. (Bug #21051)

When DROP DATABASE or SHOW OPEN TABLES was issued while concurrently issuing DROP TABLE (or RENAME TABLE, CREATE TABLE LIKE or any other statement that required a name lock) in another connection, the server crashed. (Bug #19403, Bug #21216)

Use of zero-length variable names caused a server crash. (Bug #20908)

Prepared statements caused general log and server memory corruption. (Bug #14346)

mysqldump incorrectly tried to use LOCK TABLES for tables in the INFORMATION_SCHEMA database. (Bug #21527)

Use of the --prompt option or prompt command caused mysql to be unable to connect to the Instance Manager. (Bug #17485)

The server crashed if it tried to access a CSV table for which the data file had been removed. (Bug #15205)

CREATE USER did not respect the 16-character username limit. (Bug #10668)

Creating a partitioned table that used the InnoDB storage engine and then restarting mysqld with --skip-innodb caused MySQL to crash. (Bug #20871)

In mixed-format binary logging mode, stored functions, triggers, and views that use functions in their body that require row-based logging did not replicate reliably because the logging did not switch from statement-based to row-based format. For example, INSERT INTO t SELECT FROM v, where v is a view that selects UUID() could cause problems. This limitation has been removed. (Bug #20930)

For user-defined functions created with CREATE FUNCTION, the DEFINER clause is not legal, but no error was generated. (Bug #21269)

mysqld --flush failed to flush MyISAM table changes to disk following an UPDATE statement for which no updated column had an index. (Bug #20060)

In mixed-format binary logging mode, stored functions, triggers, and views that use functions in their body that require row-based logging did not replicate reliably because the logging did not switch from statement-based to row-based format. For example, INSERT INTO t SELECT FROM v, where v is a view that selects UUID() could cause problems. This limitation has been removed. (Bug #20930)

When not running in strict mode, the server failed to convert the invalid years portion of a DATE or DATETIME value to '0000' when inserting it into a table. (Bug #19370)

The dropping of a temporary table whose name contained a backtick ('`') character was not correctly written to the binary log, which also caused it not to be replicated correctly. (Bug #19188)

Intermediate tables created during the execution of an ALTER TABLE statement were visible in the output of SHOW TABLES. (Bug #18775)

When setting a column to its implicit default value as the result of inserting a NULL into a NOT NULL column as part of a multi-row insert or LOAD DATA operation, the server returned a misleading warning message. (Bug #14770)

The --with-collation option was not honored for client connections. (Bug #7192)

Users who had the SHOW VIEW privilege for a view and privileges on one of the view's base table could not see records in INFORMATION_SCHEMA tables relating to the base table. (Bug #20543)

An issue with yaSSL prevented Connector/J clients from connecting to the server using a certificate. (Bug #19705)

Some server errors were not reported to the client, causing both to try to read from the connection until a hang or crash resulted. (Bug #16581)

FEDERATED tables raised invalid duplicate key errors when attempting on one server to insert rows having the same primary key values as rows that had been deleted from the linked table on the other server. (Bug #18764)

The C API failed to return a status message when invoking a stored procedure. (Bug #15752)

AUTHORS and CONTRIBUTORS were not treated as reserved words. (Bug #19939)

Stored procedures did not use the character set defined for the database in which they were created. (Bug #16676)

CREATE PROCEDURE, CREATE FUNTION, CREATE TRIGGER, and CREATE VIEW statements containing multi-line comments (/* ... */) could not be replicated. (Bug #20438)

The final parenthesis of a CREATE INDEX statement occurring in a stored procedure was omitted from the binary log when the stored procedure was called. (Bug #19207)

Attempting to insert a string of greater than 4096 bytes into a FEDERATED table resulted in the error ERROR 1296 (HY000) at line 2: Got error 10000 'Error on remote system: 1054: Unknown column 'string-value' from FEDERATED. This error was raised regardless of the type of column involved (VARCHAR, TEXT, and so on.) (Bug #17608)

Performance during an import on a table with a trigger that called a stored procedure was severely degraded. (Bug #21013)

Repeated DROP TABLE statements in a stored procedure could sometimes cause the server to crash. (Bug #19399)

On 64-bit Windows, a missing table generated error 1017, not the correct value of 1146. (Bug #21396)

The same trigger error message was produced under two conditions: The trigger duplicated an existing trigger name, or the trigger duplicated an existing combination of action and event. Now different messages are produced for the two conditions so as to be more informative. (Bug #10946)

The value returned by a stored function returning a string value was not of the declared character set. (Bug #16211)

FLUSH TABLES followed by a LOCK TABLES statement to lock a log table and a non-log table caused an infinite loop and high CPU use. Now FLUSH TABLES ignores log tables. To flush the log tables, use FLUSH LOGS instead. (Bug #20139)

If a filename was specified for the --log or --log-slow_queries options but the server was logging to tables and not files, the server produced no error message. (Bug #17599)

mysqlcheck tried to check views instead of ignoring them. (Bug #16502)

Long multiple-row INSERT statements could take a very long time for some multi-byte character sets. (Bug #15811)

For mysql, escaping with backslash sometimes did not work. (Bug #20103)

Under certain circumstances, AVG(key_val) returned a value but MAX(key_val) returned an empty set due to incorrect application of MIN()/MAX() optimization. (Bug #20954)

Using aggregate functions in subqueries yielded incorrect results under certain circumstances due to incorrect application of MIN()/MAX() optimization. (Bug #20792)

A query using WHERE column = constant OR column IS NULL did not return consistent results on successive invocations. The column in each part of the WHERE clause could be either the same column, or two different columns, for the effect to be observed. (Bug #21019)

The PASSWORD() function returned invalid results when used in some UNION queries. (bug #16881)

USE did not refresh database privileges when employed to re-select the current database. (Bug #10979)

A query using WHERE NOT (column < ANY (subquery)) yielded a different result from the same query using the same column and subquery with WHERE (column > ANY (subquery)). (Bug #20975)

A user variable set to a value selected from an unsigned column was stored as a signed value. (Bug #7498)

SELECT statements using GROUP BY against a view could have missing columns in the output when there was a trigger defined on one of the base tables for the view. (Bug #20466)

A SELECT with a subquery that was bound to the outer query over multiple columns returned different results when a constant was used instead of one of the dependant columns. (Bug #18925)

InnoDB: Quoted Unicode identifiers were not handled correctly. This included names of tables, columns, and foreign keys. (Bug #18800)

A stored procedure that created and invoked a prepared statement was not executed when called in a mysqld init-file. (Bug #17843)

Using the extended syntax for TRIM() — that is, TRIM(... FROM ...) — in a SELECT statement defining a view caused an invalid syntax error when selecting from the view. (Bug #17526)

Assignments of values to variables of type TEXT were handled incorrectly in stored routines. (Bug #17225)

When performing a GROUP_CONCAT(), the server transformed BLOB columns VARCHAR columns, which could cause erroneous results when using Connector/J and possibly other MySQL APIs. (Bug #16712)

The type of the value returned by the VARIANCE() function varied according to the type of the input value. The function should always return a DOUBLE value. (Bug #10966)

Performing an INSERT on a view that was defined using a SELECT that specified a collation and a column alias caused the server to crash (Bug #21086).

A query of the form shown here caused the server to crash:

SELECT * FROM t1 NATURAL JOIN (
    t2 JOIN (
        t3 NATURAL JOIN t4,
        t5 NATURAL JOIN t6
    )
    ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5)
  );

(Bug #21007)

myisam_ftdump would fail when trying to open a MyISAM index file that you did not have write permissions to access, even though the command would only be reading from the file. (Bug #17122)

REPLACE ... SELECT for a view required the INSERT privilege for tables other than the table being modified. (Bug #20989)

mysqldump sometimes did not select the correct database before trying to dump views from it, resulting in an empty result set that caused mysqldump to die with a segmentation fault. (Bug #21014)

With mixed-format binary logging, INSERT DELAYED statements were logged using statement-based logging, and they did not replicate properly for statements that used values such as UUID(), RAND(), or user-defined variables that require row-based logging. To correct this, the DELAYED handler thread how switches to row-based logging if the logging format is mixed. (Bug #20633, Bug #20649)

Using EXPLAIN PARTITIONS with a UNION query could crash the server. This could occur whether or not the query actually used any partitioned tables. (Bug #20484)

Partition pruning could cause incorrect results from queries, such missing rows, when the partitioning expression relied on a BIGINT UNSIGNED column. (Bug #20257)

The implementation for UNCOMPRESS() did not indicate that it could return NULL, causing the optimizer to do the wrong thing. (Bug #18539)

TIMESTAMPDIFF() examined only the date and ignored the time when the requested difference unit was months or quarters. (Bug #16226)

perror did not properly report NDB error codes. (Bug #16561)

mysqlimport sends a set @@character_set_database=binary statement to the server, but this is not understood by pre-4.1 servers. Now mysqlimport encloses the statement within a /*!40101 ... */ comment so that old servers will ignore it. (Bug #15690)

The character set was not being properly initialized for CAST() with a type like CHAR(2) BINARY, which resulted in incorrect results or even a server crash. (Bug #17903)

For ODBC compatibility, MySQL supports use of WHERE col_name IS NULL for DATE or DATETIME columns that are NOT NULL, to allow column values of '0000-00-00' or '0000-00-00 00:00:00' to be selected. However, this was not working for WHERE clauses in DELETE statements. (Bug #8143)

The --master-data option for mysqldump requires certain privileges, but mysqldump generated a truncated dump file without producing an appropriate error message or exit status if the invoking user did not have those privileges. (Bug #21215)

ALTER VIEW did not retain existing values of attributes that had been originally specified but were not changed in the ALTER VIEW statement. (Bug #21080)

mysql crashed for very long arguments to the connect command. (Bug #21042)

perror crashed on Solaris due to NULL return value of strerror() system call. (Bug #20145)

The query command for mysqltest did not work. (Bug #19890)

For certain queries, the server incorrectly resolved a reference to an aggregate function and crashed. (Bug #20868)

When executing a SELECT with ORDER BY on a view that is constructed from a SELECT statement containing a stored function, the stored function was evaluated too many times. (Bug #19862)

A SELECT that used a subquery in the FROM clause that did not select from a table failed when the subquery was used in a join. (Bug #21002)

Subqueries on INFORMATION_SCHEMA tables could erroneously return an empty result. (Bug #21231)

Issuing a SHOW CREATE FUNCTION or SHOW CREATE PROCEDURE statement without sufficient privileges could crash the mysql client. (Bug #20664)

In a view defined with SQL SECURITY DEFINER, the CURRENT_USER() function returned the invoker, not the definer. (Bug #20570)

DATE_ADD() and DATE_SUB() returned NULL when the result date was on the day '9999-12-31'. (Bug #12356)

For a DATE parameter sent via a MYSQL_TIME data structure, mysql_stmt_execute() zeroed the hour, minute, and second members of the structure rather than treating them as read-only. (Bug #20152)

The DATA DIRECTORY table option did not work for TEMPORARY tables. (Bug #8706)

If the files for an open table were removed at the OS level (external to the server), the server exited with an assertion failure. (Bug #16532)

Some memory leaks in the libmysqld embedded server were corrected. (Bug #16017)

With the auto_increment_increment system variable set larger than 1, if the next generated AUTO_INCREMENT value would be larger than the column's maximum value, the value would be clipped down to that maximum value and inserted, even if the resulting value would not be in the generated sequence. This could cause problems for master-master replication. Now the server clips the value down to the previous value in the sequence, which correctly produces a duplicate-key error if that value already exists in the column. (Bug #20524)

If a table on a slave server had a higher AUTO_INCREMENT counter than the corresponding master table (even though all rows of the two tables were identical), in some cases REPLACE or INSERT ... ON DUPLICATE KEY UPDATE would not replicate properly using statement-based logging. (Different values would be inserted on the master and slave.) (Bug #20188)

mysqlslap did not enable the CLIENT_MULTI_RESULTS flag when connecting, which is necessary for executing stored procedures. (Bug #20365)

When creating a table using CREATE...SELECT and a stored procedure, there would be a mismatch between the binary log and transaction cache which would cause a server crash. (Bug #21039)

When run with the --use-threads option, mysqlimport returned a random exit code. (Bug #21188)

The effect of a stored function or trigger that caused AUTO_INCREMENT values to be generated for multiple tables was not logged properly if statement-based logging was used. Only the first table's value was logged, causing replication to fail. Under mixed logging format, this is dealt with by switching to row-based logging for the function or trigger. For statement-based logging, this remains a problem. (Bug #19630)

Changing the definition of a DECIMAL column with ALTER TABLE caused loss of column values. (Bug #18014)

Under heavy load (executing more than 1024 simultaneous complex queries), a problem in the code that handles internal temporary tables could lead to writing beyond allocated space and memory corruption. Use of more than 1024 simultaneous cursors server wide also could lead to memory corruption. (This applies both to stored procedure and C API cursors.) (Bug #21206)

A race condition during slave server shutdown caused an assert failure. (Bug #20850)

mysqldump produced a malformed dump file when dumping multiple databases that contained views. (Bug #20221)

Partitions were represented internally as the wrong data type, which led in some cases to failures of queries such as SELECT COUNT(*) FROM INFORMATION_SCHEMA.PARTITIONS WHERE PARTITION_NAME = 'partition_name'. (Bug #20340)

Searches against a ZEROFILL column of a partitioned table could fail when the ZEROFILL column was part of the table's partitioning key. (Bug #20733)

In mixed binary logging mode, a temporary switch from statement-based logging to row-based logging occurs when storing a row that uses a function such as UUID() into a temporary table. However, temporary table changes are not written to the binary log under row-based logging, so the row does not exist on the slave. A subsequent select from the temporary table to a non-temporary table using statement-based logging works correctly on the master, but not on the slave where the row does not exist. The fix for this is that replication does not switch back from row-based logging to statement-based logging until there are no temporary tables for the session. (Bug #20499)

Re-executing a stored procedure with a complex stored procedure cursor query could lead to a server crash. (Bug #15217)

Views created from prepared statements inside of stored procedures were created with a definition that included both SQL_CACHE and SQL_NO_CACHE. (Bug #17203)

Updating a column of a FEDERATED table to NULL sometimes failed. (Bug #16494)

Performing INSERT ... SELECT ... JOIN ... USING without qualifying the column names caused ERROR 1052 "column 'x' in field list is ambiguous" even in cases where the column references were unambiguous. (Bug #18080)

Closing of temporary tables failed if binary logging was not enabled. (Bug #20919)

For statements that have a DEFINER clause such as CREATE TRIGGER or CREATE VIEW, long usernames or hostnames could cause a buffer overflow. (Bug #16899)

mysqldump would not dump views that had become invalid because a table named in the view definition had been dropped. Instead, it quit with an error message. Now you can specify the --force option to cause mysqldump to keep going and write a SQL comment containing the view definition to the dump output. (Bug #17371)

InnoDB (Partitioning): Updating an InnoDB table using HASH partitioning with a composite primary key would cause the server to hang. (Bug #20852)

Old partition and subpartition files were not always removed following ALTER TABLE ... REORGANIZE PARTITION statements. (Bug #20770)

Merging multiple partitions having subpartitions into a single partition with subpartitions, or splitting a single partition having subpartitions into multiple partitions with subpartitions, could sometimes crash the server. These issues were associated with a failure reported in the partition_range test. (Bug #20766, Bug #20767, Bug #20893, Bug #21357)

Some queries using ORDER BY ... DESC on subpartitioned tables could crash the server. (Bug #20389)

Referring to a stored function qualified with the name of one database and tables in another database caused a 「table doesn't exist」 error. (Bug #18444)

For NDB and possibly InnoDB tables, a BEFORE UPDATE trigger could insert incorrect values. (Bug #18437)

For multiple INSERT DELAYED statements executed in a batch by the delayed-insert handler thread, not all rows were written to the binary log. (Bug #20821)

Triggers on tables in the mysql database caused a server crash. Triggers for tables in this database now are disallowed. (Bug #18005, Bug #18361)

The length of the pattern string prefix for LIKE operations was calculated incorrectly for multi-byte character sets. As a result, the the scanned range was wider than necessary if the prefix contained any multi-byte characters, and rows could be missing from the result set. (Bug #16674, Bug #18359)

Very complex SELECT statements could create temporary tables that were too big, but for which the temporary files did not get removed, causing subsequent queries to fail. (Bug #11824)

Multiple-table updates with FEDERATED tables could cause a server crash. (Bug #19773)

On Windows, terminating mysqld with Control-C could result in a crash during shutdown. (Bug #18235)

Renaming a database to itself caused a server crash. (Bug #19392)

For spatial data types, the server formerly returned these as VARSTRING values with a binary collation. Now the server returns spatial values as BLOB values. (Bug #10166)

Using tables from MySQL 4.x in MySQL 5.x, in particular those with VARCHAR fields and using INSERT DELAYED to update data in the table would result in either data corruption or a server crash. (Bug #16611, Bug #16218, Bug #17294)

Using SELECT and a table join while running a concurrent INSERT operation would join incorrect rows. (Bug #14400)

Using SELECT on a corrupt MyISAM table using the dynamic record format could cause a server crash. (Bug #19835)

Checking a MyISAM table (using CHECK TABLE) having a spatial index and only one row would wrongly indicate that the table was corrupted. (Bug #17877)

A Table ... doesn't exist error could occur for statements that called a function defined in another database. (Bug #17199)

SHOW GRANTS FOR CURRENT_USER did not return definer grants when executed in DEFINER context (such as within a stored prodedure defined with SQL SECURITY DEFINER), it returned the invoker grants. (Bug #15298)

Portions of statements related to partitioning were not surrounded by version-specific comments by mysqldump, breaking backwards compatibility for dump files. (Bug #19488)

A DELETE FROM table with no WHERE clause (deleting all rows) running concurrently with INSERT statements on a storage engine with row-level locking (such as NDB) could produce inconsistent results when using statement-based replication. (Bug #19066)

Concatenating the results of multiple constant subselects produced incorrect results. (Bug #16716)

The use of MIN() and MAX() on columns with a partial index produced incorrect results in some queries. (Bug #18206)

The WITH CHECK OPTION was not enforced when a REPLACE statement was executed against a view. (Bug #19789)

For SELECT ... FOR UPDATE statements that used DISTINCT or GROUP BY over all key parts of a unique index (or primary key), the optimizer unnecessarily created a temporary table, thus losing the linkage to the underlying unique index values. This caused a Result set not updatable error. (The temporary table is unnecessary because under these circumstances the distinct or grouped columns must also be unique.) (Bug #16458)

A buffer overwrite error in Instance Manager caused a crash. (Bug #20622)

Re-execution of a prepared multiple-table DELETE statement that involves a trigger or stored function can result in a server crash. (Bug #19634)

On Windows, corrected a crash stemming from differences in Visual C runtime library routines from POSIX behavior regarding invalid file descriptors. (Bug #18275)

Creation of a view as a join of views or tables could fail if the views or tables are in different databases. (Bug #20482)

Use of MIN() or MAX() with GROUP BY on a ucs2 column could cause a server crash. (Bug #20076)

INSERT INTO ... SELECT ... LIMIT 1 could be slow because the LIMIT was ignored when selecting candidate rows. (Bug #9676)

Queries on tables that were partitioned by KEY and had a VARCHAR column as the partitioning key produced an empty result set. (Bug #20086)

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)

An invalid comparison between keys in partial indexes over multi-byte character fields could lead to incorrect result sets if the selected query execution plan used a range scan by a partial index over a UTF8 character field. This also caused incorrect results under similar circumstances with many other character sets. (Bug #14896)

A prepared statement that altered partitioned table within a stored procedure failed with the error Unknown prepared statement handler. (Bug #17138)

A query selecting records from a single partition of a partitioned table and using ORDER BY ic DESC (where ic represents an indexed column) could cause errors or crash the server. (Bug #20583)

NDB Cluster (Disk Data): On some platforms, ndbd compiled with gcc 4 would crash when attempting to run CREATE LOGFILE GROUP. (Bug #21981)

NDB Cluster: Setting TransactionDeadlockDetectionTimeout to a value greater than 12000 would cause scans to deadlock, time out, fail to release scan records, until the cluster ran out of scan records and stopped processing. (Bug #21800)

NDB Cluster: Data was stored unevenly between partitions due to all BLOB data being placed in partition 0. (Bug #21690)

NDB Cluster: The server provided a non-descriptive error message when encountering a fatally corrupted REDO log. (Bug #21615)

NDB Cluster: A partial rollback could lead to node restart failures. (Bug #21536)

NDB Cluster: The failure of a unique index read due to an invalid schema version could be handled incorrectly in some cases, leading to unpredictable results. (Bug #21384)

NDB Cluster: In a cluster with more than 2 replicas, a manual restart of one of the data nodes could fail and cause the other nodes in its nodegroup to shut down. (Bug #21213)

NDB Cluster: When the redo buffer ran out of space, a Pointer too large error was raised and the cluster could become unusable until restarted with --initial. (Bug #20892)

NDB Cluster: In some situations with a high disk-load, writing of the redo log could hang, causing a crash with the error message GCP STOP detected. (Bug #20904)

NDB Cluster: A vague error message was returned when reading of both schema files occurred during a restart of the cluster. (Bug #20860)

NDB Cluster: The server did not honor the value set for ndb_cache_check_time in the my.cnf file. (Bug #20708)

NDB Cluster: The server failed with a non-descriptive error message when out of data memory. (Bug #18475)

NDB Cluster (Direct APIss): Invoking the MGM API function ndb_mgm_listen_event() caused a memory leak. (Bug #21671)

NDB Cluster: The management client ALL STATUS command could sometimes report the status of some data nodes incorrectly. (Bug #13985)

NDB Cluster (Disk Data): Trying to create a Disk Data table using a nonexistent tablespace or trying to drop a nonexistent data file from a tablespace produced an uninformative error message. (Bug #21751)

NDB Cluster (Disk Data): Errors could occur when dropping a data file during a node local checkpoint. (Bug #21710)

NDB Cluster (Disk Data): Creating a tablespace and log file group, then attempting to restart the cluster without using the --initial option and without having created any Disk Data tables could cause a forced shutdown of the cluster and raise a configuration error. (Bug #21172)

NDB Cluster: Responses to the ALL DUMP 1000 management client command were printed multiple times in the cluster log for each cluster node. (Bug #21044)

A memory leak was found when running ndb_mgm -e "SHOW". (Bug #21670)

NDB Cluster (Direct APIs): The MGM API function ndb_logevent_get_fd() was not actually implemented. (Bug #21129)

NDB Cluster: Restarting a data node while DDL operations were in progress on the cluster could cause other data nodes to fail. This could also lead to mysqld hanging or crashing under some circumstances. (Bug #21017, Bug #21050)

NDB Cluster: A cluster data node could crash when an ordered index became full before the table containing the index was full. (Bug #14935)

NDB Cluster: The repeated creating and dropping of a table would eventually lead to NDB Error 826, Too many tables and attributes ... Insufficient space. (Bug #20847)

NDB Cluster: REPLACE statements did not work correctly on an NDB table having both a primary key and a unique key. In such cases, proper values were not set for columns which were not explicitly referenced in the statement. (Bug #20728)

NDB Cluster: Trying to create or drop a table while a node was restarting caused the node to crash. This is now handled by raising an error. (Bug #18781)

NDB Cluster: A race condition could in some cirumstances following a DROP TABLE. (Bug #20897)

NDB Cluster: Running ndbd --nowait-nodes=id where id was the node ID of a node that was already running would fail with an invalid error message. (Bug #20419)

NDB Cluster: When stopping and restarting multiple data nodes, the last node to be restarted would sometimes hang in Phase 100. (Bug #19645)

NDB Cluster: The DATA_LENGTH and AVG_ROW_LENGTH columns of the INFORMATION_SCHEMA.TABLES table did not report the size of variable-width column values correctly. (Bug #18413)

See 「INFORMATION_SCHEMA TABLES テーブル」, for more information.

NDB Cluster: When attempting to restart the cluster following a data import, the cluster would fail during Phase 4 of the restart with Error 2334: Job buffer congestion. (Bug #20774)

NDB Cluster: A node failure during a scan could sometime cause the node to crash when restarting too quickly following the failure. (Bug #20197)

NDB Cluster: It was possible to use port numbers greater than 65535 for ServerPort in the config.ini file. (Bug #19164)

NDB Cluster (Replication): In some cases, a large number of MySQL servers sending requests to the cluster simultaneously could cause the cluster to crash. This could also be triggered by many NDB API clients making simultaneous event subscriptions or unsubscriptions. (Bug #20683)

NDB Cluster (Direct APIs): NdbScanOperation::readTuples() and NdbIndexScanOperation::readTuples() ignored the batch parameter. (Bug #20252)

NDB Cluster: Cluster system status variables were not updated. (Bug #11459)

NDB Cluster (Disk Data): Trying to create Disk Data tables when running the cluster in diskless mode would crash the cluster's data nodes. (Bug #20008)

Note: Disk Data tables are now disabled when running in diskless mode.

NDB Cluster (Disk Data): A data file created on one tablespace could be dropped using ALTER TABLESPACE ... DROP DATAFILE on a different tablespace. (Bug #20053)

NDB Cluster: Truncating a table on one mysqld caused other mysqld processes in the cluster to return ERROR 1412 (HY000): Table definition has changed, please retry transaction on subsequent queries. (Bug #20705)

NDB Cluster: The cluster's data nodes would fail while trying to load data when NoOfFrangmentLogFiles was equal to 1. (Bug #19894)

NDB Cluster: A problem with error handling when ndb_use_exact_count was enabled could lead to incorrect values returned from queries using COUNT(). A warning is now returned in such cases. (Bug #19202)

NDB Cluster: Restarting a failed node could crash the cluster. (Bug #18782)

NDB Cluster (Disk Data): The failure of a CREATE TABLESPACE or CREATE LOGFILE GROUP statement did not revert all changes made prior to the point of failure. (Bug #16341)

NDB Cluster: Creating tables with variable-size columns caused DataMemory to be used but not freed when the tables were dropped. (Bug #20007)

NDB Cluster: Restoring a backup made using ndb_restore failed when the backup had been taken from a cluster whose data memory was full. (Bug #19852)

NDB Cluster: An excessive number of ALTER TABLE operations could cause the cluster to fail with NDB error code 773 (Out of string memory, please modify StringMemory). (Bug #19275)

NDB Cluster: TEXT columns in Cluster tables having both an explicit primary key and a unique key were not correctly updated by REPLACE statements. (Bug #19906)

NDB Cluster: Running out of DataMemory could sometimes crash ndbd and mysqld processes. (Bug #19185)

NDB Cluster (Replication): A node failure could send duplicate events, causing a mysqld replicating tables containing BLOBs to crash.

NDB Cluster (Disk Data): INFORMATION_SCHEMA.FILES records for UNDO files showed incorrect values in the EXTENT_SIZE, FREE_EXTENTS, and TOTAL_EXTENTS columns. (Bug #20073)

NDB Cluster: An internal formatting error caused some management client error messages to be unreadable. (Bug #20016)

NDB Cluster: Running management client commands while mgmd was in the process of disconnecting could cause the management server to fail. (Bug #19932)

NDB Cluster (NDBAPI): Update operations on blobs were not checked for illegal operations.

Note: Read locks with blob update operations are now upgraded from read committed to read shared.

NDB Cluster: The management client ALL STOP command shut down mgmd processes (as well as ndbd processes). (Bug #18966)

NDB Cluster: Renaming of table columns was not supported as fast a ALTER TABLE for NDB tables. (Bug #20456)

NDB Cluster: Under some circumstances, repeated DDL operations on one mysqld could cause failure of a second mysqld attached to the same cluster. (Bug #19770)

NDB Cluster (Replication): One or more of the mysqld processes could fail when subjecting a Cluster replication setup with multiple mysqld processes on both the master and slave clusters to high loads. (Bug #19768)

NDB Cluster: LOAD DATA LOCAL failed to ignore duplicate keys in Cluster tables. (Bug #19496)

NDB Cluster: Repeated CREATE - INSERT - DROP operations tables could in some circumstances cause the MySQL table definition cache to become corrupt, so that some mysqld processes could access table information but others could not. (Bug #18595)

NDB Cluster (Disk Data): Running a large nbumber of scans on Disk Data could cause subsequent scans to perform poorly. (Bug #20334)

NDB Cluster (Disk Data): An issue with disk allocation could sometimes cause a forced shutdown of the cluster when running a mix of memory and Disk Data tables. (Bug #18780)

NDB Cluster: The mgm client command ALL CLUSTERLOG STATISTICS=15; had no effect. (Bug #20336)

NDB Cluster: Under certain conditions, a starting node could miss transactions, leading to inconsistencies between the primary and backup replicas. (Bug #19929)

NDB Cluster: An uncommitted row could sometimes be checkpointed and thus incorrectly included in a backup. (Bug #19928)

NDB Cluster: A DELETE of many rows immediately followed by an INSERT on the same table could cause the ndbd process on the backup replica to crash. (Bug #19293)

NDB Cluster: TRUNCATE TABLE failed to reset the AUTO_INCREMENT counter. (Bug #18864)

NDB Cluster: SELECT ... FOR UPDATE failed to lock the selected rows. (Bug #18184)

NDB Cluster: New mysqld processes were allowed to connect without a restart of the cluster, causing the cluster to crash. (Bug #13266)

NDB Cluster: The failure of a data node when preparing to commit a transaction (that is, while the node's status was CS_PREPARE_TO_COMMIT) could cause the failure of other cluster data nodes. (Bug #20185)

NDB Cluster: Renaming a table in such a way as to move it to to a different database failed to move the table's indexes. (Bug #19967)

NDB Cluster: SHOW ENGINE NDB STATUS could sometimes return an incorrect value of 0 for the latest epoch, which could cause problems with synchronising the binlog. (Bug #20142)

NDB Cluster: A CREATE TABLE statement involving foreign key constraints raised an error rather than being silently ignored (see 「CREATE TABLE 構文」). (Bug #18483)

This bug affected Cluster in MySQL 5.1 only.

NDB Cluster (Replication): Data definition and data manipulation statements on different tables were not serialised correctly in the binlog. For example, there was no guarantee that a CREATE TABLE statement and an update on a different table would occur in the same order in the binlog as they did on the cluster being replicated. (Bug #18947)

NDB Cluster: Resources for unique indexes on Cluster table columns were incorrectly allocated, so that only one-fourth as many unique indexes as indicated by the value of UniqueHashIndexes could be created. (Bug #19623)

A cast problem caused incorrect results for prepared statements that returned float values when MySQL was compiled with gcc 4.0. (Bug #19694)

Some queries that used ORDER BY and LIMIT performed quickly in MySQL 3.23, but slowly in MySQL 4.x/5.x due to an optimizer problem. (Bug #4981)

mysql_upgrade was missing from binary MySQL distributions. (Bug #18516, Bug #20403, Bug #20556)

It was possible using ALTER EVENT ... RENAME ... to move an event to a database on which the user did not have the EVENT privilege. (Bug #18897)

A number of dependency issues in the RPM bench and test packages caused installation of these packages to fail. (Bug #20078)

Queries using an indexed column as the argument for the MIN() and MAX() functions following an ALTER TABLE .. DISABLE KEYS statement returned Got error 124 from storage engine until ALTER TABLE ... ENABLE KEYS was run on the table. (Bug #20357)

A redundant table map event could be generated in the binary log when there were no actual changes to a table being replicated. In addition, a slave failed to stop when attempting to replicate a table that did not exist on the slave. (Bug #18948)

Multiple calls to a stored procedure that altered a partitioned MyISAM table would cause the server to crash. (Bug #19309)

Adding an index to a partitioned table that had been created using AUTO_INCREMENT = value caused the AUTO_INCREMENT value to be reset. (Bug #19281)

A CREATE TABLE that produced a The PARTITION function returns the wrong type error also caused an Incorrect information in file to be printed to STDERR, and a junk file to be left in the database directory. (Bug #16000)

Nested natural joins worked executed correctly when executed as a non-prepared statement could fail with an Unknown column 'col_name' in 'field list' error when executed as a prepared statement, due to a name resolution problem. (Bug #15355)

The max_length metadata value for columns created from CONCAT() could be incorrect when the collation of an argument differed from the collation of the CONCAT() itself. In some contexts such as UNION, this could lead to truncation of the column contents. (Bug #15962)

The MD5() and SHA() functions treat their arguments as case-sensitive strings. But when they are compared, their arguments were compared as case-insensitive strings, which leads to two function calls with different arguments (and thus different results) compared as being identical. This can lead to a wrong decision made in the range optimizer and thus to an incorrect result set. (Bug #15351)

For BOOLEAN mode full-text searches on non-indexed columns, NULL rows generated by a LEFT JOIN caused incorrect query results. (Bug #14708)

If the general log table reached a large enough file size (27GB), SELECT COUNT(*) on the table caused a server crash. (Bug #17589)

Identifiers could not contain bytes with a value of 255, though that should be allowed as of the identifier-encoding changes made in MySQL 5.1.6. (Bug #12982)

BIT columns in a table could cause joins that use the table to fail. (Bug #18895)

A UNION over more than 128 SELECT statements that use an aggregate function failed. (Bug #18175)

InnoDB unlocked its data directory before committing a transaction, potentially resulting in non-recoverable tables if a server crash occurred before the commit. (Bug #19727)

Multiple-table DELETE statements containing a subquery that selected from one of the tables being modified caused a server crash. (Bug #19225)

With settings of read_buffer_size >= 2G and read_rnd_buffer_size >=2G, LOAD DATA INFILE failed with no error message or caused a server crash for files larger than 2GB. (Bug #12982)

REPLACE statements caused activation of UPDATE triggers, not DELETE and INSERT triggers. (Bug #13479)

The thread for INSERT DELAYED rows was maintaining a separate AUTO_INCREMENT counter, resulting in incorrect values being assigned if DELAYED and non-DELAYED inserts were mixed. (Bug #20195)

mysqldump wrote an extra pair of DROP DATABASE and CREATE DATABASE statements if run with the --add-drop-database option and the database contained views. (Bug #17201)

Shutting down a slave in a replication scenario where temporary tables are in use would cause the slave to produce a core dump. (Bug #19881)

When a statement is executed that does not generate any rows, an extra table map event and associated binrows event would be generated and written to the binary log. (Bug #19995)

File size specifications for InnoDB data files were case sensitive. (Bug #19609)

Compilation on Windows would fail if row based replication was disabled using --without-row-based-replication. (Bug #16837)

InnoDB did not increment the handler_read_prev counter. (Bug #19542)

In the INFORMATION_SCHEMA.FILES table, the INITIAL_SIZE, MAXIMUM_SIZE, and AUTOEXTEND_SIZE columns incorrectly were being stored as VARCHAR rather than BIGINT. (Bug #19544).

For mysqld, Valgrind revealed problems that were corrected: Possible uninitialized data in a string comparison (Bug #20783); memory corruption in replication slaves when switching databases (Bug #19022); syscall write parameter pointing to uninitialized byte (Bug #20579); uninitialized doublewrite memory in InnoDB (Bug#20791).

For ndb_mgmd, Valgrind revealed problems that were corrected: A memory leak (Bug #19318); a dependency on an uninitialized variable (Bug #20333).

An update that used a join of a table to itself and modified the table on both sides of the join reported the table as crashed. (Bug #18036)

SSL connections using yaSSL on OpenBSD could fail. (Bug #19191)

Following a failed attempt to add an index to an ARCHIVE table, it was no longer possible to drop the database in which the table had been created. (Bug #17310)

Using ALTER TABLE ... ENGINE = x, where x was not a storage engine supported by the server, would cause mysqld to crash. (Bug #20397)

Defining a table partitioned by LIST with a single PARTITION ... VALUES IN (NULL) clause could lead to server crashes, particularly with queries having WHERE conditions comparing the partitioning key with a constant. (Bug #19801 / Bug #20268)

Values greater than 2 gigabytes used in the VALUES LESS THAN clause of a table partitioned by RANGE were treated as negative numbers. (Bug #16002)

The fill_help_tables.sql file did not load properly if the ANSI_QUOTES SQL mode was enabled. (Bug #20542)

The fill_help_tables.sql file did not contain a SET NAMES 'utf8' statement to indicate its encoding. This caused problems for some settings of the MySQL character set such as big5. (Bug #20551)

The --default-storage-engine server option did not work. (Bug #20168)

The MySQL server startup script /etc/init.d/mysql (created from mysql.server) is now marked to ensure that the system services ypbind, nscd, ldap, and NTP are started first (if these are configured on the machine). (Bug #18810)

For a reference to a non-existent index in FORCE INDEX, the error message referred to a column, not an index. (Bug #17873)

The EGNINE clause was displayed in the output of SHOW CREATE TABLE for partitioned tables when the SQL mode included no_table_options. (Bug #19695)

ALTER TABLE ... COALESCE PARTITION did not delete the files associated with the partitions that were removed. (Bug #19305)

ALTER TABLE ... REBUILD PARTITION could cause the server to hang or crash. (Bug #19122)

Some yaSSL public function names conflicted with those from OpenSSL, causing conflicts for applications that linked against both OpenSSL and a version of libmysqlclient that was built with yaSSL support. The yaSSL public functions now are renamed to avoid this conflict. (Bug #19575)

CHECK TABLE on a MyISAM table briefly cleared its AUTO_INCREMENT value, while holding only a read lock. Concurrent inserts to that table could use the wrong AUTO_INCREMENT value. CHECK TABLE no longer modifies the AUTO_INCREMENT value. (Bug #19604)

If there is a global read lock, CREATE DATABASE, RENAME DATABASE, and DROP DATABASE could deadlock. (Bug #19815)

EXPLAIN PARTITIONS would produce illegible output in the partitions column if the length of text to be displayed in that column was too long. This could occur when very many partitions were defined for the table, partitions were given very long names, or due to a combination of the two. (Bug #19684)

Trying to execute a query having a WHERE clause using int_col = "string_value" OR int_col IS NULL on a partitioned table whose partitioning or subpartitioning function used the integer column int_col would crash the server. (Bug #19055)

On Linux, libmysqlclient when compiled with yaSSL using the icc compiler had a spurious dependency on C++ libraries. (Bug #20119)

In MySQL 5.1.11, the --with-openssl and --with-yassl options were replaced by --with-ssl. But no message was issued if the old options were given. Now configure produces a message indicating that the new option should be used and exits. (Bug #20002)

Grant table modifications sometimes did not refresh the in-memory tables if the hostname was '' or not specified. (Bug #16297)

Invalid escape sequences in option files caused MySQL programs that read them to abort. (Bug #15328)

Using ALTER TABLE on a subpartitioned table caused the server to crash. (Bug #19067)

For a table having LINEAR HASH subpartitions, the LINEAR keyword did not appear in the SUBPARTITION_METHOD column of the INFORMATION_SCHEMA.PARTITIONS table. (Bug #20161)

Race conditions on certain platforms could cause the Instance Manager to fail to initialize. (Bug #19391)

ALTER TABLE on a table created prior to 5.0.3 would cause table corruption if the ALTER TABLE did one of the following:

(Bug #17001)

An ALTER TABLE operation that does not need to copy data, when executed on a table created prior to MySQL 4.0.25, could result in a server crash for subsequent accesses to the table. (Bug #19192)

The binary log lacked character set information for table name when dropping temporary tables. (Bug #14157)

A B-TREE index on a MEMORY table erroneously reported duplicate entry error for multiple NULL values. (Bug #12873)

Race conditions on certain platforms could cause the Instance Manager to try to restart the same instance multiple times. (Bug #18023)

OPTIMIZE TABLE and REPAIR TABLE yielded incorrect messages or warnings when used on partitioned tables. (Bug #17455)

Selecting data from a MEMORY table with a VARCHAR column and a HASH index over it returned only the first row matched. (Bug #18233)

RPM packages had spurious dependencies on Perl modules and other programs. (Bug #13634)

Incompatible change: The Event Scheduler can now be in one of three states (on, off, or the new suspended state). In addition, due to the fact that SET GLOBAL event_scheduler; now acts in a synchronous rather than asynchronous manner, the Event Scheduler thread can be no longer be activated or deactivated at run time. (Bug #17619)

For more information regarding these changes, see 「Event Scheduler Overview」.

Previously, to build MySQL from source with SSL support enabled, you would invoke configure with either the --with-openssl or --with-yassl option. Those options both have been replaced by the --with-ssl option. By default, --with-ssl causes the bundled yaSSL library to be used. To select OpenSSL instead, give the option as --with-ssl=path, where path is the directory where the OpenSSL header files and libraries are located.

Added the --ssl-verify-server-cert option to MySQL client programs. This option causes the server's Common Name value in its certificate to be verified against the hostname used when connecting to the server, and the connection is rejected if there is a mismatch. Added MYSQL_OPT_SSL_VERIFY_SERVER_CERT option for the mysql_options() C API function to enable this verification. This feature can be used to prevent man-in-the-middle attacks. Verification is disabled by default. (Bug #17208)

Added the ssl_ca, ssl_capath, ssl_cert, ssl_cipher, and ssl_key system variables, which display the values given via the corresponding command options. See 「SSL コマンド オプション」. (Bug#19606)

NDB Cluster: The limit of 2048 ordered indexes per cluster has been lifted. There is now no upper limit on the number of ordered indexes (including AUTO_INCREMENT columns) that may be used. (Bug #14509)

Added the log_queries_not_using_indexes system variable. (Bug#19616)

Added the --angel-pid-file option to mysqlmanager for specifying the file in which the angel process records its process ID when mysqlmanager runs in daemon mode. (Bug #14106)

The ENABLE KEYS and DISABLE KEYS clauses for the ALTER TABLE statement are now supported for partitioned tables. (Bug #19502)

It is now possible to use NEW.var_name values within triggers as INOUT parameters to stored procedures. (Bug #14635)

The default for the innodb_thread_concurrency system variable was changed to 8. (Bug #15868)

mysql_explain_log (a third-party program) is no longer included in MySQL distributions.

Security fix: An SQL-injection security hole has been found in multi-byte encoding processing. The bug was in the server, incorrectly parsing the string escaped with the mysql_real_escape_string() C API function. (CVE-2006-2753, Bug#8378)

This vulnerability was discovered and reported by Josh Berkus <josh@postgresql.org> and Tom Lane <tgl@sss.pgh.pa.us> as part of the inter-project security collaboration of the OSDB consortium. For more information about SQL injection, please see the following text.

Discussion: An SQL-injection security hole has been found in multi-byte encoding processing. An SQL-injection security hole can include a situation whereby when a user supplied data to be inserted into a database, the user might inject SQL statements into the data that the server will execute. With regards to this vulnerability, when character set unaware-escaping is used (for example, addslashes() in PHP), it is possible to bypass the escaping in some multi-byte character sets (for example, SJIS, BIG5 and GBK). As a result, a function such as addslashes() is not able to prevent SQL-injection attacks. It is impossible to fix this on the server side. The best solution is for applications to use character set-aware escaping offered by a function such mysql_real_escape_string().

However, a bug was detected in how the MySQL server parses the output of mysql_real_escape_string(). As a result, even when the character set-aware function mysql_real_escape_string() was used, SQL injection was possible. This bug has been fixed.

Workarounds: If you are unable to upgrade MySQL to a version that includes the fix for the bug in mysql_real_escape_string() parsing, but run MySQL 5.0.1 or higher, you can use the NO_BACKSLASH_ESCAPES SQL mode as a workaround. (This mode was introduced in MySQL 5.0.1.) NO_BACKSLASH_ESCAPES enables an SQL standard compatibility mode, where backslash is not considered a special character. The result will be that queries will fail.

To set this mode for the current connection, enter the following SQL statement:

SET sql_mode='NO_BACKSLASH_ESCAPES';

You can also set the mode globally for all clients:

SET GLOBAL sql_mode='NO_BACKSLASH_ESCAPES';

This SQL mode also can be enabled automatically when the server starts by using the command-line option --sql-mode=NO_BACKSLASH_ESCAPES or by setting sql-mode=NO_BACKSLASH_ESCAPES in the server option file (for example, my.cnf or my.ini, depending on your system).

The patch for Bug #8303 broke the fix for Bug #8378 and was undone. (In string literals with an escape character (\) followed by a multi-byte character that has a second byte of (\), the literal was not interpreted correctly. The next byte now is escaped, not the entire multi-byte character. This means it a strict reverse of the mysql_real_escape_string() function.)

The client libraries had not been compiled for position-indpendent code on Solaris-SPARC and AMD x86_64 platforms. (Bug #13159, Bug #14202, Bug #18091)

Altering a VARCHAR column in a MyISAM table to make it longer could cause corruption of the following column. (Bug #19386)

A CREATE TABLE statement that created a table from a materialized view did not inherit default values from the underlying table. (Bug #19089)

NDB Cluster: A Cluster whose storage nodes were installed from the MySQL-ndb-storage-* RPMs could not perform CREATE or ALTER operations that made use of non-default character sets or collations. (Bug #14918)

NDB Cluster: mysqld processes did not always detect cluster shutdown, leading to issues with CLuster replication and schema distribution. (Bug #19395)

NDB Cluster: SELECT MIN(unique_column) from a Cluster table with user-defined partitioning crashed the server. (Bug #18730)

Premature optimization of nested subqueries in the FROM clause that refer to aggregate functions could lead to incorrect results. (Bug #19077)

For dates with 4-digit year parts less than 200, an 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'.) Now these operations return NULL rather than an incorrect non-NULL value. (Bug #18997)

BLOB or TEXT arguments to or values returned from stored functions were not copied properly if too long and could become garbled. (Bug #18587)

Simultaneous scheduled events whose actions conflicted with one another could crash the server. (Bug #16428)

In was not possible to invoke a stored routine containing dynamic SQL from a scheduled event. (Bug #19264)

NDB Cluster: Running ALL START in the NDB management client or restarting multiple nodes simultaneously could under some circumstances cause the cluster to crash. (Bug #19930)

The result from CONV() is a string, but was not always treated the same way as a string when converted to a real value for an arithmetic operation. (Bug #13975)

CREATE TABLE ... SELECT ... statements that used a stored function explicitly or implicitly (through a view) resulted in a Table not locked error. (Bug #12472, Bug #15137)

Within a trigger, SET used the SQL mode of the invoking statement, not the mode in effect at trigger creation time. (Bug #6951)

The server no longer uses a signal handler for signal 0 because it could cause a crash on some platforms. (Bug #15869)

The embedded server crashed with row-based replication enabled. (Bug #18518)

Display better error message for ALTER TABLE operations that will result in duplicate keys due to AUTO_INCREMENT resequencing. (Bug #14573)

The Data_free column in the output of SHOW TABLE STATUS always displayed 0 for partitioned tables. (Bug #19501)

Adding an index to a table created using partitioning by KEY and the MEMORY storage engine caused the server to crash. (Bug #19140)

When creating a table using CREATE TABLE ... PARTITION BY ... SELECT ..., the partitioning clause was ignored. (Bug #19062)

ALTER TABLE ENGINE=... failed when used to change a MySQL Cluster table having no explicit primary key to use a different storage engine. (Bug #19010)

Note: As a consequence of this fix, SHOW CREATE TABLE no longer displays auto-partitioning information for NDBCluster tables.

NDB Cluster (NDBAPI): On big-endian platforms, NdbOperation::write_attr() did not update 32-bit fields correctly. (Bug #19537)

NDB Cluster: Using 「stale」 mysqld .FRM files could cause a newly-restored cluster to fail. This situation could arise when restarting a MySQL Cluster using the --intial option while leaving connected mysqld processes running. (Bug #16875)

NDB Cluster (Replication): Memory was not freed after some ALTER TABLE operations, which could cause mysqld processes to crash. (Bug #19885)

NDB Cluster (NDBAPI): The Ndb::dropEventOperation() method failed to clean up all objects used, which could cause memory leaks to occur. (Bug #17610)

NDB Cluster: Data node failures could cause excessive CPU usage by ndb_mgmd. (Bug #13987)

NDB Cluster: TRUNCATE failed on tables having BLOB or TEXT columns with the error Lock wait timeout exceeded. This affected both in-memory and Disk Data tables. (Bug #19201)

Revised memory allocation for local objects within stored functions and triggers to avoid memory leak for repeated function or trigger invocation. (Bug #17260)

EXPLAIN ... SELECT INTO caused the client to hang. (Bug #15463)

Symlinking .mysql_history to /dev/null to suppress statement history saving by mysql did not work. (mysql deleted the symlink and recreated .mysql_history as a regular file, and then wrote history to it.) (Bug #16803)

The basedir and tmpdir system variables could not be accessed via @@var_name syntax. (Bug #1039)

Corrected several problems with the treatment of the --log-error option by mysqld_safe. These problems were manifest as differences from mysqld in error log handling.

In addition, some argument quoting problems were corrected. (Bug #6061)

Returning the value of a system variable from a stored function caused a server crash. (Bug #18037)

Use of uninitialized user variables in a subquery in the FROM clause resulted in bad entries in the binary log. (Bug #19136)

IS_USED_LOCK() could return an incorrect connection identifier. (Bug #16501)

Concurrent reading and writing of privilege structures could crash the server. (Bug #16372)

Security enhancement: Added the global max_prepared_stmt_count system variable to limit the total number of prepared statements in the server. This limits the potential for denial-of-service attacks based on running the server out of memory by preparing huge numbers of statements. The current number of prepared statements is available through the prepared_stmt_count system variable. (Bug #16365)

The mysql_upgrade command has been converted from a shell script to a C program, so it is available on non-Unix systems such as Windows. This program should be run for each MySQL upgrade. See 「mysql_upgrade — MySQL アップグレードのテーブル チェック」.

Binary distributions that include SSL support now are built using yaSSL when possible.

The MySQL-shared-compat-5.1.X-.i386.rpm shared compatibility RPMs no longer contain libraries for MySQL 5.0. This avoids a conflict because the 5.0 and 5.1 libraries share the same soname number. It contains libraries for 3.23, 4.0, 4.1, and 5.1. (Bug #19288)

The ONLY_FULL_GROUP_BY SQL mode now also applies to the HAVING clause. That is, columns not named in the GROUP BY clause cannot be used in the HAVING clause if not used in an aggregate function. (Bug #18739)

SQL syntax for prepared statements now supports ANALYZE TABLE, OPTIMIZE TABLE, and REPAIR TABLE. (Bug #19308)

XPath expressions passed to the ExtractValue() and UpdateXML() functions can now include the colon character (「 : 」). This enables use of these functions with XML which employs namespaces. (Bug #18170)

The bundled yaSSL library was upgraded to version 1.3.5. This improves handling of certain problems with SSL-related command options. (Bug #17737)

For the mysql client, typing Control-C causes mysql to attempt to kill the current statement. If this cannot be done, or Control-C is typed again before the statement is killed, mysql exits. Previously, Control-C caused mysql to exit in all cases. (Bug #1989)

Creating a table in an InnoDB database with a column name that matched the name of an internal InnoDB column (including DB_ROW_ID, DB_TRX_ID, DB_ROLL_PTR and DB_MIX_ID) would cause a crash. MySQL now returns error 1005 (cannot create table) with errno set to -1. (Bug #18934)

On Windows, some names such as nul, prn, and aux could not be used as filenames because they are reserved as device names. These are now allowable names in MySQL. They are encoded by appending @@@ to the name when the server creates the corresponding file or directory. This occurs on all platforms for portability of the corresponding database object between platforms. (Bug #17870)

Added the REFERENTIAL_CONSTRAINTS table to INFORMATION_SCHEMA. It provides information about foreign keys.

Added --debug option to Instance Manager.

Added the have_dynamic_loading system variable that indicates whether the server supports dynamic loading of plugins.

Added the sql_big_selects system variable to the output of SHOW VARIABLES.

You must now have the DROP privilege to drop table partitions. (Bug #17139)

NDB Cluster: It is now possible to perform a partial start of a cluster. That is, it is now possible to bring up the cluster without running ndbd --initial on all configured data nodes first. (Bug #18606)

NDB Cluster: It is now possible to restore a Cluster backup between big-endian and little-endian machines. (Bug #19255)

NDB Cluster: It is now possible to install MySQL with Cluster support to a non-default location and change the search path for font description files using either the --basedir or --character-sets-dir options. (Previously in MySQL 5.1, ndbd searched only the default path for character sets.)

In result set metadata, the MYSQL_FIELD.length value for BIT columns now is reported in number of bits. For example, the value for a BIT(9) column is 9. (Formerly, the value was related to number of bytes.) (Bug #13601)

Added the KEY_BLOCK_SIZE table option and index option. This can be used in CREATE TABLE, ALTER TABLE, and CREATE INDEX statements to provide a hint to the storage engine about the size to use for index key blocks. The engine is allowed to change the value if necessary.

Security fix: A malicious client, using specially crafted invalid login or COM_TABLE_DUMP packets was able to read uninitialized memory, which potentially, though unlikely in MySQL, could have led to an information disclosure. (CVE-2006-1516, CVE-2006-1517) Thanks to Stefano Di Paola <stefano.dipaola@wisec.it> for finding and reporting this bug.

Security fix: A malicious client, using specially crafted invalid COM_TABLE_DUMP packets was able to trigger an exploitable buffer overflow on the server. (CVE-2006-1518) Thanks to Stefano Di Paola <stefano.dipaola@wisec.it> for finding and reporting this bug.

NDB Cluster (Replication): Using the --binlog-do-db option caused problems with CREATE TABLE on the cluster acting as the replication master. (Bug #19492)

NDB Cluster: Some queries having a WHERE clause of the form c1=val1 OR c2 LIKE 'val2' were not evaluated correctly. (Bug # 17421)

NDB Cluster: Repeated use of the SHOW and ALL STATUS commands in the ndb_mgm client could cause the mgmd process to crash. (Bug #18591)

NDB Cluster: An issue with ndb_mgmd prevented more than 27 mysqld processes from connecting to a single cluster at one time. (Bug #17150)

Running myisampack followed by myisamchk with the --unpack option would corrupt the auto_increment key. (Bug #12633)

A view definition that referred to an alias in the HAVING clause could be saved in the .frm file with the alias replaced by the expression that it referred to, causing failure of subsequent SELECT * FROM view_name statements. (Bug #19573)

A compatibility issue with NPTL (Native POSIX Thread Library) on Linux could result in a deadlock with FLUSH TABLES WITH READ LOCK under some conditions. (Bug #20048)

MyISAM table deadlock was possible if one thread issued a LOCK TABLES request for write locks and then an administrative statement such as OPTIMIZE TABLE, if between the two statements another client meanwhile issued a multiple-table SELECT for some of the locked tables. (Bug #16986)

The patch for Bug #17164 introduced the problem that some outer joins were incorrectly converted to inner joins. (Bug #19816)

A NUL byte within a comment in a statement string caused the rest of the string not to be written to the query log, allowing logging to be bypassed. (CVE-2006-0903) (Bug #17667)

NDB Cluster: mysqld could crash when attempting an update if the cluster had failed previously. (Bug #18798)

mysql-test-run.pl started NDB even for test cases that didn't need it. (Bug #19083)

Selecting from a view that used GROUP BY on a non-constant temporal interval (such as DATE(col) + INTERVAL TIME_TO_SEC(col) SECOND could cause a server crash. (Bug #19490)

An outer join of two views that was written using { OJ ... } syntax could cause a server crash. (Bug #19396)

mysql displayed NULL for strings that are empty or contain only spaces. (Bug #19564)

A range access optimizer heuristic was invalid, causing some queries to be much slower in MySQL 5.0 than in 4.0. (Bug #17379, Bug #18940)

SELECT DISTINCT queries sometimes returned only the last row. (Bug #18068)

Eliminated some memory corruption problems that resultsd in double free or corruption errors and a server crash. (Bug #19154)

Use of CONVERT_TZ() in a stored function or trigger (or in a stored procedure called from a stored function or trigger) caused an error. (Bug #11081)

Some queries were slower in 5.0 than in 4.1 because some 4.1 cost-evaluation code had not been merged into 5.0. (Bug #14292)

MySQL-shared-compat-5.1.9-0.i386.rpm incorrectly depended on glibc 2.3 and could not be installed on a glibc 2.2 system. (Bug #16539)

Updates to a MEMORY table caused the size of BTREE indexes for the table to increase. (Bug #18160)

REPAIR TABLE did not restore the length for packed keys in tables created under MySQL 4.x. (Bug #17810)

The parser leaked memory when its stack needed to be extended. (Bug #18930)

When myisamchk needed to rebuild a table, AUTO_INCREMENT information was lost. (Bug #10405)

Use of --default-storage-engine=innodb resulted in an error with the server reporting that InnoDB was an unknown table type. (Bug #16691)

Executing a CREATE EVENT statement could cause 100% CPU usage. (Bug #19170)

After calling FLUSH STATUS, the max_used_connections variable did not increment for existing connections and connections which use the thread cache. (Bug #15933)

MySQL would not compile on Linux distributions that use the tinfo library. (Bug #18912)

An issue with file handling in the partitioning code could cause mysqld to crash when started and then stopped within a very short period of time. (Bug #19313)

NDB Cluster (Replication): When taking part in Cluster replication of tables containing BLOB columns, mysqld falsely reported a large memory leak in the replication buffers when there was none. (Bug #19247)

NDB Cluster: Stopping multiple nodes could cause node failure handling not to be completed. (Bug #19039)

NDB Cluster: A simultaneous DROP TABLE and table update operation utilising a table scan could trigger a node failure. (Bug #18597)

NDB Cluster: ndbd could sometimes fail to start with the error Node failure handling not completed following a graceful restart. (Bug #18550)

NDB Cluster: Backups could fail for large clusters with many tables, where the number of tables approached MaxNoOfTables. (Bug #17607)

NDB Cluster: A 5.1.6 or newer server did not read local checkpoints recorded by any other 5.1 version, thus preventing a system restart following an upgrade. (Bug #19333)

NDB Cluster: Trying to restore the apply_status table from a 5.0 cluster backup failed on a 5.1 server. (Bug #18935)

NDB Cluster (Disk Data): CREATE LOGFILE GROUP accepted values other than NDB or NDBCLUSTER in the ENGINE clause. (Bug #18604)

NDB Cluster (Disk Data): Omitting the required ENGINE clause from a CREATE LOGFILE GROUP or CREATE TABLESPACE statement caused the server to crash. An appropriate error message is now returned instead. (Bug #18603)

NDB Cluster: mysqldump included in its output data from the internal cluster database. (Bug #17840)

Event-creation statements enclosed in multi-line comments using /*!version_number ... */ syntax were not parsed correctly. (Bug #18078)

Within a trigger, CONNECTION_ID() did not return the connection ID of the thread that caused the trigger to be activated. (Bug #16461)

mysqltest incorrectly interpreted some ER_xxx error names given in the error command. (Bug #18495)

For single-SELECT union constructs of the form (SELECT ... ORDER BY order_list1 [LIMIT n]) ORDER BY order_list2, the ORDER BY lists were concatenated and the LIMIT clause was ignored. (Bug #18767)

Logging to the mysql.general_log and mysql.slow_log tables did not work for Windows builds because the CSV storage engine was unavailable. The CSV engine now is enabled in Windows builds. (Bug #17368)

LOAD DATA FROM MASTER would fail when trying to load the INFORMATION_SCHEMA database from the master, because the INFORMATION_SCHEMA system database would already exist on the slave. (Bug #18607)

The binary log would create an incorrect DROP query when creating temporary tables during replication. (Bug #17263)

CREATE VIEW statements would not be replicated to the slave if the --replicate-wild-ignore-table rule was enabled. (Bug #18715)

In mysqltest, --sleep=0 had no effect. Now it correctly causes sleep commands in test case files to sleep for 0 seconds. (Bug #18312)

Attempting to set the default value of an ENUM or SET column to NULL caused a server crash. (Bug #19145)

Index corruption could occur in cases when key_cache_block_size was not a multiple of myisam_block_size (for example, with key_cache_block_size=1536 and myisam_block_size=1024). (Bug #19079)

The sql_big_selects system variable was not displayed by SHOW VARIABLES. (Bug #17849)

The sql_notes and sql_warnings system variables were not always displayed correctly by SHOW VARIABLES (for example, they were displayed as ON after being set to OFF). (Bug #16195)

LAST_INSERT_ID() in a stored function or trigger returned zero. . (Bug #15728)

Use of CONVERT_TZ() in a view definition could result in spurious syntax or access errors. (Bug #15153)

The system_time_zone and version_* system variables could not be accessed via SELECT @@var_name syntax. (Bug #12792, Bug #15684)

Conversion of a number to a CHAR UNICODE string returned an invalid result. (Bug #18691)

Some fast ALTER TABLE operations (requiring no temporary table) did not work for all tables. (Bug #19011)

DELETE and UPDATE statements that used large NOT IN (value_list) clauses could use large amounts of memory. (Bug #15872)

Prevent recursive views caused by using RENAME TABLE on a view after creating it. (Bug #14308)

A LOCK TABLES statement that failed could cause MyISAM not to update table statistics properly, causing a subsequent CHECK TABLE to report table corruption. (Bug #18544)

A failed ALTER TABLE operation could fail to clean up a temporary .frm file. (Bug #18129)

For a reference to a non-existent stored function in a stored routine that had a CONTINUE handler, the server continued as though a useful result had been returned, possibly resulting in a server crash. (Bug #18787)

InnoDB did not use a consistent read for CREATE ... SELECT when innodb_locks_unsafe_for_binlog was set. (Bug #18350)

InnoDB could read a delete mark from its system tables incorrectly. (Bug #19217)

myisamchk and myisam_ftdump should allow either table names or .MYI filenames as arguments, but allowed only table names. (Bug #19220)

DROP DATABASE did not drop stored routines associated with the database if the database name was longer than 21 characters. (Bug #18344)

Avoid trying to include <asm/atomic.h> when it doesn't work in C++ code. (Bug #13621)

Executing SELECT on a large table that had been compressed within myisampack could cause a crash. (Bug #17917)

NDB Cluster (NDBAPI): Passing a nonexistent index name to NdbIndexScanOperation::setBound() caused a segmentation fault. (Bug #19088)

ALTER TABLE ... REBUILD PARTITION returned an inaccurate error message. (Bug #16819)

InnoDB: A DELETE followed by an INSERT and then by an UPDATE on a partitioned InnoDB table caused subsequent queries to return incorrect results. (Bug #17992)

NDB Cluster: A table insert or update of more than 128 bytes of data in a 4-replica Cluster could cause a node to crash. (Bug #18622)

NDB Cluster (Disk Data): Concurrent table schema operations and operations on log files groups, tablespaces, data files, or undofiles could lead to Cluster node failures. (Bug #18575)

NDB Cluster: An issue with replication caused a mysqld connected to a replicated cluster to crash when entering single user mode. (Bug #18535)

Successive ALTER TABLE ... DROP PARTITION statements on the same subpartitioned table could eventually cause the server to crash. (Bug #18962)

NDB Cluster: When attempting to create an index on a BIT or BLOB column, Error 743: Unsupported character set in table or index was returned instead of Error 906: Unsupported attribute type in index.

NDB Cluster: The Cluster binlog mysqld accepted updates even though the binary log was not set up, which could lead to updates missing from the binary log. (Bug #18932)

NDB Cluster: Concurrent INSERT and ROLLBACK statements from different connections could cause node failures. (Bug #19245)

NDB Cluster (Disk Data): Running an INSERT and a DELETE on a Disk Data table in the same transaction could cause a deadlock. (Bug #19244)

NDB Cluster (Disk Data): Issuing a CREATE LOGFILE GROUP statement during the drop of an NDB table would cause database corruption. (Bug #19141)

NDB Cluster: ndb_restore failed to restore a backup made from a 5.0 cluster to a 5.1 cluster. (Bug #18210)

NDB Cluster: Adding an index to an unsigned integer column did not work correctly. (Bug #18133)

NDB Cluster: A SELECT from an NDB table with ORDER BY indexed_column and a LIMIT clause would fail following ALTER TABLE. (Bug #18094)

NDB Cluster: Performing multiple ALTER TABLE operations on the same NDB table from different mysqld processes in the same cluster led to schema versioning errors when trying to access the table again following the restart of one of the mysqld processes. (Bug #16445)

NDB Cluster: Starting mysqld without --log-bin caused DDL statements on NDB tables to time out. (Bug #19214)

NDB Cluster: Fragment IDs were not being logged correctly, causing ndb_restore_log to fail. (Bug #18594)

Casting a string to DECIMAL worked, but casting a trimmed string (using LTRIM() or RTRIM()) resulted in loss of decimal digits. (Bug #17043)

NDB Cluster (Replication): Delete and update of rows in a table without a primary key failed on the slave. (Bug #17400)

NDB Cluster: On slow networks or CPUs, the management client SHOW command could sometimes erroneously show all data nodes as being master nodes belonging to nodegroup 0. (Bug #15530)

The XPath string-length() function was not implemented for use with ExtractValue(). (Bug #16319)

Fix the way that Instance Manager finds the version number of instances, so that it works properly when the executable name isn't the same as what the Instance Manager launched (such as when wrapping a libtool-wrapped executable from the source tree). (Bug #19059)

The server attempted to flush uninitialized log tables during SIGHUP processing, causing a crash. (Bug #18848)

If the second or third argument to BETWEEN was a constant expression such as '2005-09-01 - INTERVAL 6 MONTH and the other two arguments were columns, BETWEEN was evaluated incorrectly. (Bug #18618)

If the first argument to BETWEEN was a DATE or TIME column of a view and the other arguments were constants, BETWEEN did not perform conversion of the constants to the appropriate temporary type, resulting in incorrect evaluation. (Bug #16069)

ExtractValue function did not return character data within <![CDATA[]]> as expected. (Bug #18285)

Server and clients ignored the --sysconfdir option that was passed to configure. (Bug #15069)

It was possible to create a RANGE-partitioned table with a partition defined using the clause VALUES LESS THAN (NULL), even though such a partition could never contain any values whatsoever. (Bug #18752)

Running an ALTER TABLE on a partitioned table simultaneously experiencing a high number of concurrent DML statements could crash the server. (Bug #18572)

It was possible to use trailing spaces in the names of partitions and subpartitions. Attempting to do so now raises the error Incorrect partition name. (Bug #17973)

LIKE searches failed on a CHAR column used as the partitioning column of a table partitioned by KEY. (Bug #17946)

If the WHERE condition of a query contained an OR-ed FALSE term, the set of tables whose rows cannot serve for null-complements in outer joins was determined incorrectly. This resulted in blocking possible conversions of outer joins into joins by the optimizer for such queries. (Bug #17164)

The ExtractValue() function failed with a syntax error when the XPath expression used special characters such as Ñ (「N-tilde」). (Bug #16233)

Inserts failed with duplicate key errors on a table partitioned using an AUTO_INCREMENT column for the partitioning key. (Bug #18552, Bug #18753)

Delimited identifiers for partitions were not being treated the same as delimited identifiers for other database objects (such as tables and columns) with regard to allowed characters. (Bug #18750)

A query on a table partitioned or subpartitioned by HASH did not display all results when using a WHERE condition involving a column used in the hashing expression. (Bug #18423, Bug #18329)

If the server were built without partition support, it was possible to run partitioning-related statements with no errors or warnings, even though these statements would have no effect. Now such statements are disallowed unless the server has been compiled using the --with-partition option. (Bug #15561)

NDB Cluster: In a 2-node cluster with a node failure, restarting the node with a low value for StartPartialTimeout could cause the cluster to come up partitioned (「split-brain」 issue). (Bug #16447)

A similar issue could occur when the cluster was first started with a sufficiently low value for this parameter. (Bug #18612)

NDB Cluster: On systems with multiple network interfaces, data nodes would get 「stuck」 in startup phase 2 if the interface connecting them to the management server was working on node startup while the interface interconnecting the data nodes experienced a temporary outage. (Bug #15695)

NDB Cluster: Unused open handlers for tables in which the metadata had changed were not properly closed. This could result in stale results from Cluster tables following an ALTER TABLE. (Bug #13228)

NDB Cluster: Uninitialized internal variables could lead to unexpected results. (Bug #11033, Bug #11034)

The presence of multiple equalities in a condition after reading a constant table could cause the optimizer not to use an index. This resulted in certain queries being much slower than in MySQL 4.1. (Bug #16504)

A recent change caused the mysql client not to display NULL values correctly and to display numeric columns left-justified rather than right-justified. The problems have been corrected. (Bug #18265)

InnoDB failure to release an adaptive hash index latch could cause a server crash if the query cache was enabled. (Bug #15758)

InnoDB: ALTER TABLE to add or drop a foreign key for an InnoDB table had no effect. (Bug #18477)

NDB Cluster: Attempting to create an index using multiple columns on an explicitly partitioned table in a replicated Cluster database could cause the master mysqld process to crash. (Bug #18284)

NDB Cluster: Queries using ORDER BY pkN failed against a LIST-partitioned Cluster table having a multi-column primary key, where pkN represents one of the columns making up the primary key. (Bug #18598)

Updating a field value when also requesting a lock with GET_LOCK() would cause slave servers in a replication environment to terminate. (Bug #17284)

SHOW PLUGIN was renamed to SHOW PLUGINS. SHOW PLUGIN now is deprecated and generates a warning. (Bug #17112)

Binary MySQL distributions now include a mysqld-max server, in addition to the usual mysqld optimized server and the mysqld-debug debugging server.

mysqld_safe no longer checks for a mysqld-max binary. Instead, mysqld_safe nows checks only for the standard mysqld server unless another server binary is specified explicitly via --mysqld or --mysqld-version. If you previously relied on the implicit invocation of mysqld-max, you should use an appropriate option now. (Bug #17861)

For partitioned tables, the output of SHOW TABLE STATUS now shows in the Engine column the name of the storage engine used by all partitions for the table; in the Create_options column, the output now shows partitioned for a partitioned table. This change also affects the values shown in the corresponding columns of the INFORMATION_SCHEMA.TABLES table. (Bug #17631)

NDB Cluster: A new --nowait-nodes startup option for ndbd makes it possible to 「skip」 specific nodes without waiting for them to start when starting the cluster. See 「ndbdのコマンド オプション」.

The NDBCluster storage engine now supports CREATE TABLE statements of arbitrary length. (Previously, CREATE TABLE statements for MySQL Cluster tables could contain a maximum of 4096 characters only.) (Bug #17813)

Large file support was re-enabled for the MySQL server binary for the AIX 5.2 platform. (Bug #13571)

The mysql_get_ssl_cipher() C API function was added.

Security fix: Invalid arguments to DATE_FORMAT() caused a server crash. (CVE-2006-3469, Bug #20729) Thanks to Jean-David Maillefer for discovering and reporting this problem to the Debian project and to Christian Hammers from the Debian Team for notifying us of it.

NDB Cluster: BLOB columns did not work correctly with user-partitioned NDB tables. (Bug #16796)

mysql_config returned incorrect libraries on x86_64 systems. (Bug #13158)

mysql_reconnect() sent a SET NAMES statement to the server, even for pre-4.1 servers that do not understand the statement. (Bug #18830)

COUNT(*) on a MyISAM table could return different results for the base table and a view on the base table. (Bug #18237)

For mysql.server, if the basedir option was specified after datadir in an option file, the setting for datadir was ignored and assumed to be located under basedir. (Bug #16240)

For full-text searches in boolean mode, and when a full-text parser plugin was used, a MYSQL_FTPARSER_PARAM::ftparser_state could have been corrupted by recursive calls to the plugin. (Bug #18836)

EXTRACT(QUARTER FROM date) returned unexpected results. (Bug #18100)

TRUNCATE did not reset the AUTO_INCREMENT counter for MyISAM tables when issued inside a stored procedure. (Bug #14945)

Note: This bug did not affect InnoDB tables. Also, TRUNCATE does not reset the AUTO_INCREMENT counter for NDBCluster tables regardless of when it is called (see Bug #18864).

The server was always built as though --with-extra-charsets=complex had been specified. (Bug #12076)

Partition pruning did not work properly for some kinds of partitioning and subpartitioning, with certain WHERE clauses. (Partitions and subpartitions that should have been marked as used were not so marked.) The error could manifest as incorrect content in EXPLAIN PARTITIONS output as well as missing rows in the results of affected queries. (Bug #18558)

NDB Cluster: An unitialized internal variable could lead to unexpected results. (Bug #18831)

For tables created in a MySQL 4.1 installation upgraded to MySQL 5.0 and up, multiple-table updates could update only the first matching row. (Bug #16281)

Complex queries with nested joins could cause a server crash. (Bug #18279)

A query against a partitioned table using WHERE col IS NULL could produce incorrect results given the following conditions:

The same issue could cause the server to crash when run in debug mode. (Bug #18659)

CAST(double AS SIGNED INT) for large double values outside the signed integer range truncates the result to be within range, but the result sometimes had the wrong sign, and no warning was generated. (Bug #15098)

MEDIUMINT columns were not handled in the same way as other column types by partition pruning.

Partition pruning would sometimes use inappropriate columns in preforming queries.

Both of these issues were rectified as part of the same bugfix. (Bug #18025)

Quoted values could not be used for partition option values. (Bug #13520)

Delimited identifiers could not be used in defining partitions. (Bug #13433)

Building the server using --with-example-storage-engine failed to enable the EXAMPLE storage engine in the server. (Bug #18464)

Triggers created in one version of the server could not be dropped after upgrading to a newer version. (Bug #15921)

Queries using WHERE ... IS NULL returned incorrect results from partitioned tables. (Bug #18070)

Partition pruning did not perform correctly with partitions on NULL, and could potentially crash the server. (Bug #18053)

If InnoDB encountered a HA_ERR_LOCK_TABLE_FULL error and rolled back a transaction, the transaction was still written to the binary log. (Bug #18283)

In order not to break legacy applications, support for TYPE = engine_name has been restored, but now generates a warning.

Important: This option has been deprecated since MySQL 4.0. Beginning with MySQL 5.2, TYPE = engine_name will no longer be available and will produce a syntax error. You should not use TYPE in any new applications, and you should immediately begin conversion of existing applications to use the ENGINE = engine_name syntax instead. (Bug #17501)

The deprecated constructs in the following table now generate warnings. You should not employ them in new applications, as they are likely to be removed in a future version of MySQL. Use the equivalents shown in the table's second column instead. For the same reason, existing applications depending on the deprecated constructs should be converted to make use of the current equivalents as soon as possible. (Bug #17501)

The deprecated items shown in the table are not guaranteed to be available in MySQL 5.2 or later.

Incompatible change: For purposes of determining placement, RANGE partitioning now treats NULL as less than any other value. (Formerly, NULL was treated as equal to zero.) See 「MySQLパーティショニングの NULL 値の取り扱い」. (Bug #15447)

Incompatible Change: The semantics of ALTER TABLE t ENGINE=X; for partitioned tables is changed, and now means that the storage engine used for table t is changed to X.

The previous statement formerly (prior to MySQL 5.1.8) meant that all partitioning was removed from the table. In order to remove the partitioning of a table, the syntax ALTER TABLE t REMOVE PARTITIONING; is introduced. The REMOVE PARTITIONING option can be used in combination with existing ALTER TABLE options such as those employed for adding or dropping columns or indexes. (Bug #17754)

Added the --sysdate-is-now option to mysqld to enable SYSDATE() to be treated as an alias for NOW(). See 「日付時刻関数」. (Bug #15101)

The NDBCluster storage engine now supports INSERT IGNORE and REPLACE statements. Previously, these statements failed with an error. (Bug #17431)

Events no longer support times past the end of the Unix epoch. (Formerly, such dates were interpreted as being at the beginning of the Unix epoch.) (Bug #16396)

Event names are now case-insenstive. That is (for example), you cannot have events with the names Myevent and MyEvent belonging to the same database and definer. (Bug #16415)

Builds for Windows, Linux, and Unix (except AIX) platforms now have SSL support enabled, in the server as well as in the client libraries. Because part of the SSL code is written in C++, this does introduce dependencies on the system's C++ runtime libraries in several cases, depending on compiler specifics. (Bug #18195)

Temporary tables may no longer be partitioned. (Bug #17497)

Added the --events option to mysqldump to enable events to be included in the dump output. (Bug #16853)

NDB Cluster (Disk Data): You can now have only one log file group at any one time. See 「CREATE LOGFILE GROUP 構文」. (Bug #16386)

The syntax for CREATE PROCEDURE and CREATE FUNCTION statements now includes a DEFINER clause. The DEFINER value specifies the security context to be used when checking access privileges at routine invocation time if the routine has the SQL SECURITY DEFINER characteristic. See 「CREATE PROCEDUREおよびCREATE FUNCTION 構文」, for more information.

When mysqldump is invoked with the --routines option, it now dumps the DEFINER value for stored routines.

The output from SHOW CREATE TABLE is more consistent about using uppercase for keywords. Data types still are in lowercase. (Bug #10460)

The ExtractValue() function with contains() now uses the SQL collation in making comparisons. Perviously, comparisons were always binary (that is, case-sensitive). (Bug #16316)

The cluster_replication database has been renamed to cluster. This will effect replication between MySQL Clusters where one cluster is running MySQL 5.1.8 or later, and the other is running MySQL 5.1.7 or earlier. See 「MySQL Cluster レプリケーション」, and especially 「レプリケーション スキーマおよびテーブル」.

The stability of CREATE and DROP operations on NDB tables containing BLOB columns has been improved. (Bug #17761)

More specific error messages are now given when attempting to create an excessive number of partitions or subpartitions. (Previously, no distinction was made between an excessive number of partitions and an excessive number of subpartitions.) (Bug #17393)

The mysqltest utility now converts all CR/LF combinations to LF to allow test cases intended for Windows to work properly on UNIX-like systems. (Bug #13809)

The mysql_ping function will now retry if the reconnect flag is set and error CR_SERVER_LOST is encountered during the first attempt to ping the server. (Bug #14057)

mysqldump now surrounds the DEFINER, SQL SECURITY DEFINER and WITH CHECK OPTION clauses of a CREATE VIEW statement with "not in version" comments to prevent errors in earlier versions of MySQL. (Bug #14871)

For an event having no STARTS time specified when it was created, the mysql.event table's start column now displays the creation time rather than NULL. (Bug #16537)

In addition, both the SHOW EVENTS statement's Starts column and the STARTS column of the INFORMATION_SCHEMA.EVENTS table are now empty rather than NULL when STARTS was not used in the CREATE EVENT statement.

MICROSECOND intervals are no longer allowed for events. (Bug #16411)

Description of the EVENT privilege has been changed to To create, alter, drop, and execute events. (Bug #16412)

The binlog_format system variable now is dynamic and can be changed at runtime, as described in 「レプリケーション フォーマット」.

The binlog_format system variable now can be set to a third format, MIXED, as described in 「レプリケーション フォーマット」.

A slave server may switch the format automatically now. This happens when the server is running in either STATEMENT or MIXED format and encounters a row in the binary log that is written in ROW logging format. In that case, the slave switches to row-based replication temporarily for that event, and switches back to the previous format afterwards.

Partition pruning was made more stable, particularly in cases involving queries using tests for NULL values in the WHERE clause against subpartitioned tables which were partitioned by LIST( some_function(col1, ... ,colN) ). (Bug #17891)

Names of subpartitions must now be unique for an entire table, and not merely within the same partition. (Bug #15408)

The output of SHOW CREATE EVENT no longer qualifies the event name with the name of the schem to which the event belongs. (Bug #17714)

The client API will now attempt to reconnect on TCP/IP if the reconnect flag is set, as is the case with sockets. (Bug #2845)

The XPath last() function is now implemented for use with ExtractValue(). (Bug #16318)

Stored routine names longer than 64 characters were silently truncated. Now the limit is properly enforced and an error occurs. (Bug #17015)

During conversion from one character set to ucs2, multi-byte characters with no ucs2 equivalent were converted to multiple characters, rather than to 0x003F QUESTION MARK. (Bug #15375)

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)

Replication of data stored in a partitioned table would cause slave servers to issue a assertion and terminate. (Bug #18436)

The mysql_close() C API function leaked handles for shared-memory connections on Windows. (Bug #15846)

Checks for permissions on database operations could be performed in a case-insensitive manner (a user with permissions on database MYDATABASE could by accident get permissions on database myDataBase), if the privilege data were still cached from a previous check. (Bug #17279)

The server would crash when SHOW STATUS was called on a server linked with yaSSL. (Bug #18310)

SELECT ... WHERE column LIKE 'A%', when column had a key and used the latin2_czech_cs collation, caused the wrong number of rows to be returned. (Bug #17374)

Using ALTER TABLE to increase the length of a BINARY(M) column caused column values to be padded with spaces rather than 0x00 bytes. (Bug #16857)

Execution of a stored function or trigger which inserted data into a table while running concurrent selects on the same table could result in storing incorrect data in the query cache. (Bug #14767)

NDB Cluster: Attempting to restart a node with dropped events still pending would fail. (Bug #18491)

NDB Cluster: In asynchronous replication scenarios, binary log events could be lost on the remote mysqld. (Bug # 18472)

NDB Cluster: Two mysqld processes starting at the same time could cause a race condition. (Bug #18472)

NDB Cluster: Two mysqld processes did not synchronise DROP TABLE binary log events correctly. (Bug #18395)

NDB Cluster: When multiple node restarts were attempted without allowing each restart to complete, the error message returned was Array index out of bounds rather than Too many crashed replicas. (Bug #18349)

A SELECT ... ORDER BY ... from a view defined using a function could crash the server. An example of such a view might be CREATE VIEW v1 AS SELECT SQRT(c1) FROM t1. (Bug #18386)

REPAIR TABLE, OPTIMIZE TABLE, and ALTER TABLE operations on transactional tables (or on tables of any type on Windows) could corrupt triggers associated with those tables. (Bug #18153)

MyISAM: Performing a bulk insert on a table referenced by a trigger would crash the table. (Bug #17764)

Using ORDER BY intvar within a stored procedure (where intvar is an integer variable or expression) would crash the server. (Bug #16474)

Note: The use of an integer i in an ORDER BY i clause for sorting the result by the i^th column is deprecated (and non-standard). It should not be used in new applications. See 「SELECT 構文」.

A SELECT using a function against a nested view would crash the server. (Bug #15683)

ALTER TABLE ... ADD COLUMN ... AFTER ... failed when used on partitioned tables. (Bug #16806)

NDB Cluster: A timeout in the handling of an ABORT condition with more that 32 operations could yield a node failure. (Bug #18414)

NDB Cluster: A node restart immediately following a CREATE TABLE would fail. Important: This fix supports 2-node Clusters only. (Bug #18385)

NDB Cluster: In event of a node failure during a rollback, a 「false」 lock could be established on the backup for that node, which lock could not be removed without restarting the node. (Bug #18352)

NDB Cluster: The cluster created a crashed replica of a table having an ordered index — or when logging was not enabled, of a table having a table or unique index — leading to a crash of the cluster following 8 successibe restarts. (Bug #18298)

NDB Cluster: When replacing a failed master node, the replacement node could cause the cluster to crash from a buffer overflow if it had an excessively large amount of data to write to the cluster log. (Bug #18118)

NDB Cluster: Restarting nodes were allowed to start and join the cluster too early. (Bug #16772)

NDB Cluster: Issuing a DROP LOGFILE GROUP statement would cause ndbd processes to crash if MySQL had been compiled with gcc4. (Bug #18295)

Using triggers with partitioned InnoDB tables led to incorrect results. (Bug #17744)

Calling CREATE TABLE or ALTER TABLE twice on a partitioned table in a stored procedure or a prepared statement resulted in errors and sometimes server crashes. (Bug #17290)

A problem with NULLs and interval mapping sometimes caused incorrect results or crashes when trying to use less-than searches on partitioned tables. (Bug #17173)

CREATE TABLE ... PARTITION ... AS SELECT ... would cause the server to crash. (Bug #15336)

Creating a partition which depends on an expression containing a column using the UTF8 character set would cause the server to crash. (Bug #14367)

Invoking more than once a prepared statement that creates a partitioned table would crash the server. (Bug #14350)

NDB Cluster: A SELECT ... ORDER BY query on an explicitly partitioned Cluster table with no explicit indexes would crash the server. (Bug #17899)

The ExtractValue() function did not return an error when passed an invalid XPath string. (Bug #18172)

Stored procedures that call UDFs and pass local string variables caused server crashes. (Bug #17261)

Connecting to a server with a UCS2 default character set with a client using a non-UCS2 character set crashed the server. (Bug #18004)

Loading of UDFs in a statically linked MySQL caused a server crash. UDF loading is now blocked if the MySQL server is statically linked. (Bug #11835)

A security enhancement in Visual Studio 8 could cause a MySQL debug server compiled with it to hang when running SELECT queries against partitioned tables. (Bug #17722)

NDB Cluster: auto_increment values were not propagated correctly in statement-based replication. (Bug #18208)

Rpeated invocations of a stored procedure containing a SHOW CREATE EVENT statement would result in the error Packets out of order. (Bug #17403)

Repeated invocations of a stored procedure containing a CREATE EVENT or ALTER EVENT statement would crash the server. (Bug #16408)

Renaming and adding a new column to a partitioned table in the same ALTER TABLE statement caused the server to crash. (Bug #17772)

ALTER TABLE ... REBUILD PARTITION with no partition name specified would crash the server. (Bug #17940)

Trying to add a partition to a table having subpartitions could crash the server. (Bug #17140)

Attempting to use a conflicting VALUES clause in ALTER TABLE ... ADD PARTITION caused the server to crash. An example of such a conflicting clause would be that uses VALUES LESS THAN (constant) (which indicates a range) with a table that is partitioned by LIST. (Bug #17127)

ALTER TABLE ... COALESCE PARTITION failed with an Out of Memory error. (Bug #16810)

Names of subpartitions were not displayed in the output of SHOW CREATE TABLE. (Bug #16370)

Setting up subpartitions on at least one but not all the partitions of a partitioned table caused the server to crash. (Bug #15407)

Using the position() function in the XPath argument to ExtractValue() crashed the server. (Bug #18171)

A query with a WHERE date_column > date_value condition failed on a table partitioned by RANGE. (Bug #17894)

Cursors in stored routines could cause a server crash. (Bug #16887)

Replication slaves could not replicate triggers from older servers that included no DEFINER clause in the trigger definition. Now the trigger executes with the privileges of the invoker (which on the slave is the slave SQL thread). (Bug #16266)

Character set conversion of string constants for UNION of constant and table column was not done when it was safe to do so. (Bug #15949)

NULL values were written to the mysql.slow_log table incorrectly. (Bug #17600)

A query with a WHERE date_column > date_value condition failed on a table partitioned by RANGE. (Bug #17894)

A failed ALTER TABLE ... ADD PRIMARY KEY on a partitioned table would result in bad table metadata and could possibly crash the server. (Bug #17097)

No error was reported when subpartitions were defined for a non-subpartitioned table. (Bug #15961)

Searches on indexed columns of partitioned tables failed to find all matching rows following updates of the indexed columns. (Bug #14526)

The DEFINER value for stored routines was not replicated. (Bug #15963)

Use of TRUNCATE TABLE for a TEMPORARY table on a master server was propagated to slaves properly, but slaves did not decrement the Slave_open_temp_tables counter properly. (Bug #17137)

SELECT COUNT(*) for a MyISAM table could return different results depending on whether an index was used. (Bug #14980)

Updating a view that filters certain rows to set a filtered out row to be included in the table caused infinite loop. For example, if the view has a WHERE clause of salary > 100 then issuing an UPDATE statement of SET salary = 200 WHERE id = 10, caused an infinite loop. (Bug #17726)

Creating a table with the same name as the mapped name of another table caused a server crash. For example, if MySQL maps the table name txu#P#p1 to txu@0023P@0023p1 on disk, creating another table named txu@0023P@0023p1 crashed the server. (Bug #17142)

NDB Cluster: Adding an index together with replication could cause mysqld to crash. (Bug #18106)

NDB Cluster: Insufficient StringBuffer memory when attempting to create a trigger caused the server to crash. (Bug #18101)

NDB Cluster: Variable-length columns used as primary keys were not handled correctly. (Bug #18075)

NDB Cluster: Row-based replication could fail with tables using VARCHAR columns for primary keys and having BLOB columns. (Bug #18067)

NDB Cluster: CREATE UNIQUE INDEX on a column containing non-unique data could cause one or more ndbd nodes to hang or crash. (Bug #18040)

NDB Cluster (Disk Data): CREATE UNIQUE INDEX failed with Error 4243: Index not found. (Bug #18039)

NDB Cluster: Node recovery of tables with VARCHAR columns using character sets was inconsistent, which could cause a number of issues, including the data nodes failing to restart and ALTER TABLE statements to hang. (Bug #18026)

NDB Cluster: In some cases, a single ndbd node would fail following a system restart. (Bug #17854)

NDB Cluster (Replication): The binary log on the secondary master was not being set up correctly following a table rename. (Bug #17838)

NDB Cluster: With a single replica, transactions waiting in the log synchronisation queue were not being restarted, causing them to be aborted. (Bug #17536)

NDB Cluster (Disk Data): It was not possible to create more than 9 tablespaces. (Bug #16913)

NDB Cluster: Inserting and deleting BLOB column values while a backup was in process could cause the loss of an ndbd node. (Bug #14028)

NDB Cluster: UNDO_BUFFER_SIZE was limited to 17 MB. (Bug #16657, Bug #17890)

Using ALTER TABLE ... REBUILD PARTITION without specifying the name of the partition caused the server to crash, rather than reporting a syntax error. (Bug #17947)

When attempting to insert a 0 into a LIST-partitioned table that had no value-list containing 0, no error was reported. (Bug #15253)

If the server was started with the --skip-grant-tables option, it was impossible to create a trigger or a view without explicitly specifying a DEFINER clause. (Bug #16777)

The server would execute stored routines that had a non-existent definer. (Bug #13198)

NDB Cluster: A simultaneous RENAME of several tables was logged multiple times. (Bug #17827)

NDB Cluster: Trying to perform a DELETE from a Cluster table following a LOCK TABLES would cause the ndbd processes to hang. (Bug #17812)

ALTER TABLE ... REORGANIZE PARTITION failed with Error on rename of filename ... on Windows. (Bug #17720)

NDB Cluster: ALTER TABLE ... ADD INDEX failed with ERROR 756: Index on disk column is not supported when run against a Disk Data table having a primary key. (Bug #17888)

NDB Cluster: DELETE operations on NDB tables could cause memory leaks. (Bug #16874)

NDB Cluster: Some query cache statistics were not always correctly reported for Cluster tables. (Bug #16795)

The EXAMPLE storage engine did not work on Windows. (Bug #17721)

For FEDERATED tables, a SELECT statement with an ORDER BY clause did not return rows in the proper order. (Bug #17377)

Setting the myisam_repair_threads system variable to a value larger than 1 could cause corruption of large MyISAM tables. (Bug #11527)

The length of a VARCHAR() column that used the utf8 character set would increase each time the table was re-created in a stored procedure or prepared statement, eventually causing the CREATE TABLE statement to fail. (Bug #13134)

The MySQL server could crash with out of memory errors when performing aggregate functions on a DECIMAL column. (Bug #17602)

INSERT statements executed by scheduled events were not written to the general log. (Bug #16413)

A memory leak caused warnings on slaves for certain statements that executed without warning on the master. (Bug #16175)

Naming a partition using the characters Ç or ç (「c-cedilla」; Unicode 00C7 or 00E7) made unreadable the table containing the partition. (Bug #14527)

The self() XPath function was not handled correcty by ExtractValue(). (Bug #16315)

The ExtractValue() function would not accept expressions which matched element names containing an underscore character. (Bug #16320)

NDB Cluster: Trying to update very large partitioned tables using the NDB storage engine sometimes caused the server to crash. (Bug #16385, Bug #17806)

Slow queries executed by scheduled events were not being written to the slow query log. (Bug #16426)

On Linux, creation of table partitions failed within a stored procedure. (Bug #14363)

mysql_fix_privilege_tables didn't create the mysql.plugin table. (Bug #17568)

Improper checking of binary log statements could result in a server crash. (Bug #17457)

The ExtractValue() function allowed the use of the ! character in identifiers by ignoring the illegal character. This is now correctly reported as a syntax error. (Bug #16313)

NDB Cluster: Trying to insert a value into a nonexistent LIST partition of an NDB table would cause the server to crash. (Bug #17763)

NDB Cluster: ALTER TABLE on a partitioned NDB table could cause the server to crash. (Bug #17499)

NDB Cluster: A repeated SELECT on a partitioned table that used the NDB storage engine could cause the server to crash. (Bug #17390)

NDB Cluster: Using ALTER TABLE ... ADD PARTITION on a table partitioned by LIST would cause the client to hang. (Bug #17701)

Triggers created without BEGIN and END clauses resulted in 「You have an error in your SQL syntax」 errors when dumping and replaying a binary log. (Bug #16878)

The RENAME TABLE statement did not move triggers to the new table. (Bug #13525)

Clients compiled from source with the --without-readline did not save command history from session to session. (Bug #16557)

Stored routines that contained only a single statement were not written properly to the dumpfile when using mysqldump. (Bug #14857)

Issuing GRANT EXECUTE on a procedure would display any warnings related to the creation of the procedure. (Bug #7787)

Attempting to add a new partition to a table partitioned by a unique key would cause an Out of memory error. (Bug #17169)

In a highly concurrent environment, a server crash or deadlock could result from execution of a statement that used stored functions or activated triggers coincident with alteration of the tables used by these functions or triggers. (Bug #16593)

Incompatible change: TYPE = engine_name is no longer accepted as a synonym for the ENGINE = engine_name table option. (TYPE has been deprecated since MySQL 4.0.)

Several changes were made to make upgrades easier:

Incompatible change: The mysql_stmt_attr_get() C API function now returns a boolean rather than an unsigned int for STMT_ATTR_UPDATE_MAX_LENGTH. (Bug #16144)

Added the --wait-timeout option to mysqlmanager to allow configuration of the timeout for dropping an inactive connection, and increased the default timeout from 30 seconds to 28,800 seconds (8 hours). (Bug #12674, Bug#15980)

All subpartitions within a given partitioned table are now guaranteed to have unique names. (Bug #15408)

Added the RENAME DATABASE statement.

The SQL mode in effect at the time an event is created or altered is recorded and used during event execution. (Bug #16407)

Added the PROCESSLIST table to INFORMATION_SCHEMA.

Attempting to read pre-5.1.6 partitioned tables with a MySQL 5.1.7 (or later) server now generates a suitable warning message. (Bug #16695)

For additional information about this issue, see 「Changes in release 5.1.6 (01 February 2006)」.

NDB Cluster: Attempting to SELECT ... FROM INFORMATION_SCHEMA.FILES now raises a warning in the event that the cluster has crashed. (Bug #17087)

NDB Cluster: It is now possible to replicate NDB tables having no explicit primary key. See 「MySQL Cluster レプリケーション」.

Removed the have_isam and have_raid system variables.

Status messages added to ndb_restore to allow users to know that data files for Disk Data are being created. (Bug #16873)

Added the IN NATURAL LANGUAGE MODE and IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION modifiers for full-text searches. See 「全文検索関数」.

Creator privileges are now checked for all events before execution. (Bug #17289)

CREATE EVENT, DROP EVENT, and ALTER EVENT statements are not allowed in triggers. (Bug #16410)

New charset command added to mysql command-line client. By typing charset name or \C name (such as \C UTF8), the client character set can be changed without reconnecting. (Bug #16217)

In row-based replication, when executing a Rows_log_event, the associated table was locked, the rows applied and the lock released. This did not work since there are storage engines that count locks and perform an autocommit when the number of locks reach zero. Now we ensure that all table maps come before all ROWS events in a statement.

NDB Cluster: ndbd restart could sometimes fail due to incorrect memory access. (Bug #17417)

Execution times for scheduled events were not calculated correctly: the last execution time was used as a base rather than the actual start time. (Bug #17494)

Using an XPath expression containing = with ExtractValue() caused the server to crash. (Bug #16242)

NDB Cluster: An unhandled resources issue could cause node failure with a DELETE FROM TABLE affecting thousands of rows. (Bug #16492)

NDB Cluster: Cluster tables not having an explicit primary key could not be replicated. (Bug #14541)

For a transaction that used MyISAM and InnoDB tables, interruption of the transaction due to a dropped connection on a master server caused slaves to lose synchrony. (Bug #16559)

SELECT with GROUP BY on a view could cause a server crash. (Bug #16382)

SET TRANSACTION ISOLATION LEVEL acted like SET SESSION TRANSACTION ISOLATION LEVEL. That is, it set the isolation level for longer than the next transaction. (Bug #7955)

SHOW CREATE TABLE produced extraneous spaces after the PRIMARY KEY keywords. (Bug #13883)

If the query optimizer transformed a GROUP BY clause in a subquery, it did not also transform the HAVING clause if there was one, producing incorrect results. (Bug #16603)

SUBSTRING_INDEX() could yield inconsistent results when applied with the same arguments to consecutive rows in a query. (Bug #14676)

myisam_ftdump did not work for FULLTEXT indexes associated with a parser plugin. (Bug #17116)

BIT fields were not properly handled when using row-based replication. (Bug #13418)

Column counts were encoded incorrectly in the binary log for row-based logging format. (Bug #17678)

Data truncations on non-UNIQUE indexes could crash InnoDB when using multi-byte character sets. (Bug #17530)

An ALTER DATABASE statement on a replication master crashed the slaves. (Bug #17521)

Partitioning with certain SUBPARTITION BY HASH clauses caused an error when querying for a partitioned column using an IS NULL comparison. (Bug #17430, Bug #17432)

The mysql_fix_privilege_tables.sql script did not properly initialize the Event_priv column to 'Y' for those accounts that should have the EVENT privilege. (Bug #16400)

NDB Cluster: Inserting the output of REPEAT('some_string', some_int) into a BLOB column resulted in the error Invalid blob attributes or invalid blob parts table. (Bug #17505)

NDB Cluster: Row-based replication was not being set up correctly if a backup was already in progress. For example, connecting a mysqld instance to a cluster which was being backed up would result in the message NDB: skipping setup table test.t1 being written to the error log. (Bug #17459)

NDB Cluster: CREATE TEMPORARY TABLE of a Cluster table would fail with an Unsupported error or crash the server. (Bug #17210, Bug #16552)

NDB Cluster: UNIQUE keys in Cluster tables were limited to 225 bytes in length. (Bug #15918)

NDB Cluster: REPLACE failed when attempting to update a primary key value in a Cluster table. (Bug #14007)

NDB Cluster: Creating NDB tables containing BLOB columns but no primary key caused unpredictable behavior. (Bug #17559)

Creating an event and using a whitespace character other than space following the DO keyword caused a server crash. (Bug #17453)

Previously, a stored function invocation was written to the binary log as DO func_name() if the invocation changes data and occurs within a non-logged statement, or if the function invokes a stored procedure that produces an error. These invocations now are logged as SELECT func_name() instead for better control over error code checking (slave servers could stop due to detecting a different error than occurred on the master). (Bug #14769)

CHECKSUM TABLE returned different values on MyISAM table depending on whether the QUICK or EXTENDED options were used. (Bug #8841)

Querying the INFORMATION_SCHEMA.PARTITIONS table on a non-max server caused a server crash. This also happened following the creation of a table with a very large number (hundreds) of partitions. (Bug #16591, Bug #17141)

Attempting to add a new partition to a table partitioned by a unique key would cause an Out of memory error. (Bug #17169)

MySQL server dropped client connection for certain SELECT statements against views defined that used MERGE algorithm. (Bug #16260)

A statement containing GROUP BY and HAVING clauses could return incorrect results when the HAVING clause contained logic that returned FALSE for every row. (Bug #14927)

Using GROUP BY on column used in WHERE clause could cause empty set to be returned. (Bug #16203)

DROP DATABASE did not drop events for the database. (Bug #16406)

Race conditions between event creation, dropping, and execution could result in a server crash or hang. (Bug #17373)

SET sql_mode = N, where N > 31, did not work properly. (Bug #13897)

Repeated invocation of my_init() and my_end() caused corruption of character set data and connection failure. (Bug #6536)

When used with the ExtractValue() function, an XPath expression having no leading 「 / 」 character would crash the server. (Bug #16234)

A SELECT from the last partition of a subpartitioned table having a UNIQUE KEY could crash the MySQL Server. (Bug #16907)

A SELECT on a subpartitioned table having a multiple-column PRIMARY or UNIQUE KEY, and whose partitioning function used only the first column of the key, could cause mysqld to crash. (Bug #16901)

Using REPLACE INTO on a partitioned table having a primary key would crash the server in the event of a duplicate key error. (Bug #16782)

DROP TABLE would sometimes fail on a table having subpartitions that used the default storage engine. (Bug #16775)

NDB Cluster: Sharing of table names containing special characters between multiple SQL nodes was not handled correctly when binary logging was enabled (a timeout error resulted). (Bug #17415)

NDB Cluster: Table definitions were not shared between multiple SQL nodes in a cluster without binary logging being enabled. (Bug #17414)

NDB Cluster: Cluster log file paths were truncated to 128 characters. They may now be as long as MAX_PATH (the maximum path length permitted by the operating system). (Bug #17411)

SHOW CREATE EVENT displayed no output. (Bug #16423)

Statements that contained Unicode characters were not logged to the log tables correctly. (Bug #16905)

On Windows platforms, some attempts to create partitioned tables from the command line would cause the mysql client to hang. (Bug #17082)

NDB Cluster: SHOW CREATE TABLE would fail when run against a table created in a different session. (Bug #17340)

NDB Cluster: Following multiple forced shutdowns and restarts of data nodes, DROP DATABASE could fail. (Bug #17325)

NDB Cluster: An UPDATE with an inner join failed to match any records if both tables in the join did not have a primary key. (Bug #17257)

NDB Cluster: A DELETE with a join in the WHERE clause failed to retrieve any records if both tables in the join did not have a primary key. (Bug #17249)

The NDB Cluster storage engine did not allow views to be updated. (Bug #17206)

NDB Cluster: Row-based replication of a cluster failed to take --binlog_ignore_db settings into account. (Bug #17188)

Trying to create a partitioned table with more than 32 attributes failed. (Bug #17179)

NDB Cluster: When attempting to import data into an NDB table using LOAD DATA INFILE, the server would hang in the event of a duplicate key error. (Bug #17154)

NDB Cluster: In some cases, LOAD DATA INFILE did not load all data into NDB tables. (Bug #17081)

NDB Cluster: Performing large numbers of data manipulation statements on cluster tables using Disk Data could lead to a server crash. ()

NDB Cluster: In some cases, a cluster using Disk Data tables could not be restarted following a normal shutdown. (Bug #16872)

NDB Cluster: The REDO log would become corrupted (and thus unreadable) in some circumstances, due to a failure in the query handler. (Bug #17295)

NDB Cluster: CREATE TABLE new_tbl LIKE old_tbl; failed when old_tbl used the NDB storage engine. (Bug #17005)

NDB Cluster: No error message was generated for setting NoOfFragmentLogFiles too low. (Bug #13966)

NDB Cluster: No error message was generated for setting MaxNoOfAttributes too low. (Bug #13965)

The SELECT privilege was required for triggers that performed no selects. (Bug #15196)

The UPDATE privilege was required for triggers that performed no updates. (Bug #15166)

CAST(... AS TIME) operations returned different results when using versus not using prepared-statement protocol. (Bug #15805)

Killing a long-running query containing a subquery could cause a server crash. (Bug #14851)

InnoDB could display an incorrect error message for a cascading update. (Bug #9680)

A RETURN statement within a trigger caused a server crash. RETURN now is disallowed within triggers. To exit immediately, use LEAVE. (Bug #16829)

Packaging changes: MySQL 5.1.6 introduces some changes to distribution packaging:

Incompatible change: This release introduces the TRIGGER privilege. Previously, the SUPER privilege was needed to create or drop triggers. Now those operations require the TRIGGER privilege. This is a security improvement because you no longer need to grant users the SUPER privilege to enable them to create triggers. However, the requirement that the account named in a trigger's DEFINER clause must have the SUPER privilege has changed to a requirement for the TRIGGER privilege. After upgrading, be sure to update your grant tables as described in 「mysql_fix_privilege_tables — MySQL システム テーブルのアップグレード」. This process assigns the TRIGGER privilege to all accounts that had the SUPER privilege. (After updating, you might also consider whether any of those accounts no longer need SUPER.) If you fail to update the grant tables, triggers may fail when activated. (Bug #9142)

Incompatible change: Before MySQL 5.1.6, the server writes general query log and slow query log entries to log files. As of MySQL 5.1.6, the server's logging capabilities for these logs are more flexible. Log entries can be written to log files (as before) or to the general_log and slow_log tables in the mysql database. If logging is enabled, either or both destinations can be selected. The --log-output option controls the destination or destinations of log output. See 「一般クエリとスロー クエリのログ出力先の選択」.

If logging is enabled, the default destination now is to log to tables, which differs from earlier versions. If you had the server configured for logging to log files formerly, use --log-output=FILE to preserve this behavior after an upgrade to MySQL 5.1.6 or higher.

Incompatible change: Due to a change in the naming scheme for partitioning and subpartitioning files, it is not possible for the server to read partitioned tables created in previous MySQL versions. A suggested workaround is (1) to create a non-partitioned table with the same table schema using a standard CREATE TABLE statement (that is, with no partitioning clauses) and then (2) to issue a SELECT INTO to copy the data into the non-partitioned table before the upgrade; following the upgrade, you can partition the new table using ALTER TABLE ... PARTITION BY .... Alternatively, you can dump the table using mysqldump prior to upgrading and reload it afterwards with LOAD DATA. In either case, you should drop the pre-5.1.6 partitioned tables before upgrading to 5.1.6 or later. (Bug #13437)

Important: If any partitioned tables that were created prior to MySQL 5.1.6 are present following an upgrade to MySQL 5.1.6 or later, it is also not possible to read from the INFORMATION_SCHEMA.PARTITIONS table, nor will you be able to drop those tables or the database or databases in which they are located. In this event, you must: (1) shut down mysqld; (2) manually delete the table, partition, and (if any) subpartition files; and then (3) restart the MySQL Server. (Bug #16695)

Incompatible change: Words with apostrophes are now matched in a FULLTEXT search against non-apostrophe words (for example, a search for Jerry will match against the term Jerry's). Users upgrading to this version must issue REPAIR TABLE statements for tables containing FULLTEXT indexes. (Bug #14194)

MySQL 5.1.6 introduces the Event Scheduler which allows one to schedule statements for execution at predetermined times. Events can be transient (one-time-only) or recurrent at regular intervals, and may execute queries and statements permitted in stored routines, including compound statements.

Events can be altered after creation, and dropped when no longer needed.

Information about scheduled events can be obtained using the statements SHOW EVENTS and SHOW CREATE EVENT, or by querying the INFORMATION_SCHEMA.EVENTS table. All of these are available beginning in MySQL 5.1.6.

Users must have the EVENT privilege (also added in 5.1.6) to create events.

For more information, see 19章Event Scheduler.

Replication between MySQL Clusters is now supported. It is now also possible to replicate between a MySQL Cluster and a non-cluster database. See 「MySQL Cluster レプリケーション」.

Special characters in database and table identifiers now are encoded when creating the corresponding directory names and filenames. This relaxes the restrictions on the characters that can appear in identifiers. See 「ファイル名への識別子のマッピング」.

Queries against partitioned tables can now take advantage of partition pruning. In some cases, this can result in query execution that is an order of magnitude faster than the same query against a non-partitioned version of the same table.

The mysqldump utility now supports an option for dumping tablespaces. Use -Y or --all-tablespaces to enable this functionality. (Bug #16753)

Partition support is not an 「engine」, but it was included in the output of SHOW ENGINES. Now it is not. (Bug #14355) The have_partition_engine variable was renamed to have_partitioning. (Bug #16718)

ANALYZE TABLE is now supported for partitioned tables. (Bug #13441)

Added the event_scheduler system variable.

Added the ndb_extra_logging system variable.

Added the FILES table to INFORMATION_SCHEMA.

Added the EVENTS table to INFORMATION_SCHEMA.

Added the PARTITIONS table to INFORMATION_SCHEMA.

The ARCHIVE storage engine now supports the AUTO_INCREMENT column attribute and the AUTO_INCREMENT table option. 「ARCHIVE ストレージエンジン」.

Added support for the CREATE INDEX and DROP INDEX statements to the NDB Cluster storage engine.

Server plugins can register their own status variables to be displayed by the SHOW STATUS statement.

An indexing error sometimes caused values to be assigned to the wrong RANGE partition. (Bug #16684)

NDB Cluster: ndb_delete_all would run out of memory on tables containing BLOB columns. (Bug #16693)

Using the TRUNCATE() function with a negative number for the second argument on a BIGINT column returned incorrect results. (Bug #8461)

When the fulltext search parser plugin returned more words than half of the length (in bytes) of the query string, the server would crash. (Bug #16722)

Improper memory handling for stored routine variables could cause memory overruns and binary log corruption. (Bug #15588)

A FULLTEXT query in a prepared statement could result in unexpected behavior. (Bug #14496)

STR_TO_DATE(1,NULL) caused a server crash. (CVE-2006-3081, Bug #15828)

An INSERT statement in a stored procedure corrupted the binary log. (Bug #16621)

The mysql_real_connect() C API function incorrectly reset the MYSQL_OPT_RECONNECT option to its default value. (Bug #15719)

Specifying a value for --tmpdir without a trailing slash had unpredictable results. (Bug #15904)

Attempting to insert data into a partitioned table that used the BLACKHOLE storage engine caused mysqld to crash. (Bug #14524)

Using RANGE partitioning with a CASE statement as the partitioning function would cause records to be placed in the wrong partition. (Bug #15393)

ALTER TABLE ... ADD PARTITIONS on a table with one partition crashed the server. (Bug #15820)

NDB Cluster returned incorrect Can't find file error for OS error 24, changed to Too many open files. (Bug #15020)

Multi-byte path names for LOAD DATA and SELECT ... INTO OUTFILE caused errors. Added the character_set_filesystem system variable, which controls the interpretation of string literals that refer to filenames. (Bug #12448)

Certain subqueries where the inner query is the result of a aggregate function would return different results on MySQL 5.0 than on MySQL 4.1. (Bug #15347)

The error message for specifying values for which no partition exists returned wrong values on certain platforms. (Bug #15910)

Certain Japanese table names were not properly saved during a CREATE TABLE statement. (Bug #3906)

NDB Cluster leaked disk space when performing INSERTS/DELETES in a loop. (Bug #16771)

NDB Cluster returned wrong error when tablespace on disk was full. (Bug #16738)

The DATA DIRECTORY and INDEX DIRECTORY clauses of a CREATE TABLE statement involving partitions did not work. (Bug #14354)

Subselect could return wrong results when records cache and grouping was involved. (Bug #15347)

In some cases the query optimizer did not properly perform multiple joins where inner joins followed left joins, resulting in corrupted result sets. (Bug #15633)

The absence of a table in the left part of a left or right join was not checked prior to name resolution, which resulted in a server crash. (Bug #15538)

NDB Cluster: Trying to import too many dumped tables requiring resources beyond those allocated in the cluster configuration would cause the server to crash instead of reporting an insufficient resources error. (Bug #16455)

NDB Cluster (Disk Data): Tablespaces created using parameters with relatively low values (< 10 MB) produced filesizes much smaller than expected. (Bug #16742)

NDB Cluster: CREATE TABLESPACE statements were incorrectly parsed on 64-bit platforms. (INITIAL SIZE size worked, but INITIAL SIZE = size failed.) (Bug #13556)

Trying to add more than one partition in a single ALTER TABLE ... ADD PARTITION statement caused the server to crash. (Bug #16534)

Creating a partitioned table using a storage engine other than the session default storage engine caused the server to crash. (Bug #15966)

An ALTER TABLE ... PARTITION BY ... statement did not have any effect. (Bug #15523)

NDBCluster (Disk Data): The error message generated by a failed ADD UNDOFILE did not provide any reasons for the failure. (Bug #16267)

NDBCluster (Disk Data): DROP LOGFILE GROUP corrupted the cluster file system and caused ndbd to fail when running more than one node on the same system. (Bug #16193)

NDBCluster: A bitfield whose offset and length totaled 32 would crash the cluster. (Bug #16125)

NDBCluster: Upon the completion of a scan where a key request remained outstanding on the primary replica and a starting node died, the scan did not terminate. This caused incompleted error handling of the failed node. (Bug #15908)

NDBCluster: The ndb_autodiscover test failed sporadically due to a node not being permitted to connect to the cluster. (Bug #15619)

Using mysqldump to obtain a dump of a partitioned table employing the NDB storage engine produced a non-functional table creation statement. (Bug #13155)

SHOW CREATE TABLE did not display the PARTITIONS clause for tables partitioned by HASH or KEY. (Bug #14327)

Inserting a negative value into an integer column used as the partitioning key for a table partitioned by HASH could cause the server to crash. (Bug #15968)

With a table partitioned by LIST, inserting a value which was smaller than any value shown in the partitioning value-lists could cause the server to crash. (Bug #14365)

ALTER TABLE ... DROP PARTITION would truncate all DATE column values in the table's remaining partitions to NULL. (Bug #13644)

ALTER TABLE ... ADD PARTITION could crash the server or cause an Out of memory error in some circumstances. (Bug #13447)

The server would allow foreign keys to be declared in the definition of a partitioned table despite the fact that partitioned tables do not support foreign keys (see 「パーティショニングの制約と制限」). (Bug #13446)

A SELECT from a key-partitioned table with a multi-column key could cause the server to crash. (Bug #13445)

Issuing a TRUNCATE statement twice in succession on the same partitioned table would cause the server to crash. (Bug #13442)

Using a REPLACE statement on a partitioned table caused the server to crash. (Bug #13440)

Using an identifier rather than a literal integer value in the LESS THAN clause of a range-partitioned table could cause the server to crash and corruption of tables. (Bug #13439)

Using ENGINE=... within a PARTITION clause could cause the server to crash. (Bug #13438)

CREATE TABLE ... LIKE did not work if the table whose schema was to be copied was a partitoned table. (Bug #13435)

SHOW CREATE TABLE did not display the PARTITIONS clause for tables partitioned by HASH or KEY. (Bug #14327)

Certain permission management statements could create a NULL hostname for a user, resulting in a server crash. (Bug #15598)

Temporary table aliasing did not work inside stored functions. (Bug #12198)

Parallel builds occasionally failed on Solaris. (Bug #16282)

Added the INFORMATION_SCHEMA ENGINES table.

Added the INFORMATION_SCHEMA PLUGINS table and the SHOW PLUGIN statement.

Added the binlog_format system variable that controls whether to use row-based or statement-based binary logging. Added the --binlog-format and --binlog-row-event-max-size server options for binary logging control. See 「レプリケーション フォーマット」.

Plugins now can have status variables that are displayed in the output from SHOW STATUS. See 「Writing Plugins」.

Added the XML functions ExtractValue() and UpdateXML(). ExtractValue() returns the content of a fragment of XML matching a given XPath expression. UpdateXML() replaces the element selected from a fragment of XML by an XPath expression supplied by the user with a second XML fragment (also user-supplied), and returns the modified XML. See 「XML 関数」.

Added the --base64-output option to mysqlbinlog to print all binary log entries using base64 encoding. This is for debugging only. Logs produced using this option should not be applied on production systems.

Added the --port-open-timeout option to mysqld to control how many seconds the server should wait for the TCP/IP port to become free if it cannot be opened. (Bug #15591)

Two new Hungarian collations are included: utf8_hungarian_ci and ucs2_hungarian_ci. These support the correct sort order for Hungarian vowels. However, they do not support the correct order for sorting Hungarian consonant contractions; this issue will be fixed in a future release.

InnoDB: An UPDATE statement with no index column in the WHERE condition locked all the rows in the table. (Bug #3300)

INSERT DELAYED caused mysqld to crash. (Bug #16095)

The output of mysqldump --triggers did not contain the DEFINER clause in dumped trigger definitions. (Bug #15110)

The output of SHOW TRIGGERS contained extraneous whitespace. (Bug #15103)

An INSERT ... SELECT statement between tables in a MERGE set can return errors when statement involves insert into child table from merge table or vice-versa. (Bug #5390)

A COMMIT statement followed by a ALTER TABLE statement on a BDB table caused server crash. (Bug #14212)

InnoDB: Comparison of indexed VARCHAR CHARACTER SET ucs2 COLLATE ucs2_bin columns using LIKE could fail. (Bug #14583)

Creating a trigger caused a server crash if the table or trigger database was not known because no default database had been selected. (Bug #14863)

Issuing a DROP USER command could cause some users to encounter a hostname is not allowed to connect to this MySQL server error. (Bug #15775)

The --plugin_dir option was not working. Also fix error with specifying parser name for fulltext. (Bug #16068)

Attempting to insert into a table partitioned by LIST a value less than any specified in one of the table's partition definitions resulted in a server crash. In such cases, mysqld now returns ERROR 1500 (HY000): Table has no partition for value v , where v is the out-of-range value. (Bug #15819)

Added the mysqlslap program, which is designed to emulate client load for a MySQL server and report the timing of each stage. It works as if multiple clients are accessing the server.

Added the --server-id option to mysqlbinlog to enable only those events created by the server having the given server ID to be extracted. (Bug #15485)

It is now possible to build the server such that MyISAM tables can support up to 128 keys rather than the standard 64. This can be done by configuring the build using the option --with-max-indexes=N, where N≤128 is the maximum number of indexes to permit per table. (Bug #10932)

The bundled BDB library was upgraded to version 4.4.16.

Added the cp1250_polish_ci collation for the cp1250 character set.

Added the myisam_use_mmap system variable.

Added the --bdb-data-direct and --bdb-log-direct server options.

SHOW ENGINES output showed the FEDERATED engine as DISABLED even for builds with FEDERATED support. (Bug #15559)

Server could not be built on default Debian systems with BDB enabled. (Bug #15734)

BDB: A DELETE, INSERT, or UPDATE of a BDB table could cause the server to crash where the query contained a subquery using an index read. (Bug #15536)

A left join on a column that having a NULL value could cause the server to crash. (Bug #15268)

It was not possible to reorganize a partition reusing a discarded partition name.

Now, for example, you can create a table such as this one:

CREATE TABLE t1 (a INT) 
    PARTITION BY RANGE (a) (
      PARTITION p0 VALUES LESS THAN (10),
      PARTITION p1 VALUES LESS THAN (20),
      PARTITION p2 VALUES LESS THAN MAXVALUE
    );

and then repartition it as shown here:

ALTER TABLE t1 REORGANIZE PARTITION p2 INTO (
    PARTITION p2 VALUES LESS THAN (30)
);

Previously, attempting to do so would produce the error All partitions must have unique names in the table . (Bug #15521)

NDB Cluster: The --ndb option for perror did not function. (Bug #15486)

The BLACKHOLE storage engine did not handle transactions properly: Rolled-back transactions were written to the binary log. Now they ae not. (Bug #15406)

NDB Cluster: Using ORDER BY primary_key_column when selecting from a table having the primary key on a VARCHAR column caused a forced shutdown of the cluster. (Bug #14828, Bug #15240, Bug #15682, Bug #15517)

ANALYZE TABLE did not properly update table statistics for a MyISAM table with a FULLTEXT index containing stopwords, so a subsequent ANALYZE TABLE would not recognize the table as having already been analyzed. (Bug #14902)

The maximum value of MAX_ROWS was handled incorrectly on 64-bit systems. (Bug #14155)

Multiple-table update operations were counting updates and not updated rows. As a result, if a row had several updates it was counted several times for the 「rows matched」 value but updated only once. (Bug #15028)

SELECT queries that began with an opening parenthesis were not being placed in the query cache. (Bug #14652)

Space truncation was being ignored when inserting into BINARY or VARBINARY columns. Now space truncation results in a warning, or an error in strict mode. (Bug #14299)

Selecting from a view processed with the temptable algorithm caused a server crash if the query cache was enabled. (Bug #15119)

Creating a view that referenced a stored function that selected from a view caused a crash upon selection from the view. (Bug #15096)

Creating a view within a stored procedure could result in an out of memory error or a server crash. (Bug #14885)

SHOW CREATE DATABASE was sometimes refused when the client had privileges for the database. (Bug #9785)

mysql ignored the MYSQL_TCP_PORT environment variable. (Bug #5792)

ROW_COUNT() returned an incorrect result after EXECUTE of a prepared statement. (Bug #14956)

Invalid casts to DATE values now result in a message of Incorrect datetime value, rather than Truncated incorrect datetime value. (Bug #8294)

Attempts to assign NULL to a NOT NULL column in strict mode now result in a message of Column 'col_name' cannot be null, rather than Column set to default value; NULL supplied to NOT NULL column 'col_name' at row n. (Bug #11491)

For binary string data types, mysqldump --hex-blob produced an illegal output value of 0x rather than ''. (Bug #13318)

Some comparisons for the IN() operator were inconsistent with equivalent comparisons for the = operator. (Bug #12612)

Partitioning: allows distributing portions of individual tables across a filesystem, according to rules which can be set when the table is created. In effect, different portions of a table are stored as separate tables in different locations, but from the user point of view, the partitioned table is still a single table. See 15章パーティショニング, for further information on this functionality. (Author: Mikael Ronström)

Plugin API: MySQL 5.1 adds support for a very flexible plugin API that enables loading and unloading of various components at runtime, without restarting the server. Although the work on this is not finished yet, plugin full-text parsers are a first step in this direction. This allows users to implement their own input filter on the indexed text, enabling full-text search capability on arbitrary data such as PDF files or other document formats. A pre-parser full-text plugin performs the actual parsing and extraction of the text and hands it over to the built-in MySQL full-text search. (Author: Sergey Vojtovich)

The plugin API requires the mysql.plugin table. When upgrading from an older version of MySQL, you should run the mysql_fix_privilege_tables command to create this table. See 「mysql_fix_privilege_tables — MySQL システム テーブルのアップグレード」.

Incompatible change: Plugins are installed in the directory named by the plugin_dir system variable. This variable also controls the location from which the server loads user-defined functions (UDFs), which is a change from earlier versions of MySQL. That is, all UDF library files now must be installed in the plugin directory. When upgrading from an older version of MySQL, you must migrate your UDF files to the plugin directory.

The Instance Manager (IM) now has some additional functionality:

The performance of boolean full-text searches (using the 「+」 Operator) has been improved. See 「全文検索関数」, for more details about full-text searching. (Author: Sergey Vojtovich)

VARCHAR fields used in MySQL Cluster tables are now variable-sized; that is, they now only allocate as much space as required to store the data. Previously, a VARCHAR(n) column allocated n+2 bytes (aligned to 4 bytes), regardless if the actual inserted value required that much space. (In other words, a VARCHAR column always required the same, fixed, amount of storage as a CHAR column of the same size.)

Renamed the table_cache system variable to table_open_cache. Any scripts that refer to table_cache should be updated to use the new name.

Added the table_definition_cache system variable. If you use a large number of tables, you can create a large table definition cache to speed up opening of tables. The table definition cache takes less space and does not use file descriptors, unlike the normal table cache.

Added the SHOW AUTHORS statement.

Added the SHOW FUNCTION CODE and SHOW PROCEDURE CODE statements (available only for servers that have been built with debugging support). See 「SHOW PROCEDURE CODE と SHOW FUNCTION CODE 構文」.

RAND() no longer allows non-constant initializers. (Prior to MySQL 5.0.13, the effect of non-constant initializers is undefined.) (Bug #6172)

Set functions could not be aggregated in outer subqueries. (Bug #12762)

Added MAXLOCKS, MINLOCKS, MAXWRITE, and MINWRITE as allowable values of the --bdb-lock-detect option. (Bug #14876)

Added the bdb_cache_parts and bdb_region_size system variables, and allowed bdb_cache_size to be larger than 4GB on systems that support it. (Bug #14895)

Added Transactions, XA, and Savepoints columns to SHOW ENGINES output.

Added --replace to mysqldump. This option uses REPLACE INTO, rather than INSERT INTO, when writing the dumpfile.

Foreign keys were not properly enforced in TEMPORARY tables. Foreign keys now are disallowed in TEMPORARY tables. (Bug #12084)

Performing a CREATE TABLE statement with a PARTITION BY clause in a prepared statement could crash a server running in debug mode. (Bug #12097)

NDB: Specifying the wrong nodegroup in a CREATE TABLE using partitioning would lead to the table name being locked after the CREATE TABLE statement failed (that is, the table name could not be re-used). (Bug #12114)

Using ORDER BY in a query with a partitioned table on a 64-bit operating system could crash the server. (Bug #12116)

When two threads competed for the same table, a deadlock could occur if one thread also had a lock on another table through LOCK TABLES and the thread was attempting to remove the table in some manner while the other thread tried to place locks on both tables. (Bug #10600)

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

Added support for ODBC v2 statement options using attributes.

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

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

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

Fixed occasional mis-handling of the SQL_NUMERIC_C type.

Fixed the binding of certain integer types.