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)

MySQL now can do stack dumps on x86_64 and i386/NPTL systems. (Bug#21250)

The mysqld manpage has been reclassified from volume 1 to volume 8. (Bug#21220)

A warning now is issued if the client attempts to set the SQL_LOG_OFF variable without the SUPER privilege. (Bug#16180)

The LOAD DATA FROM MASTER and LOAD TABLE FROM MASTER statements are deprecated. See Section 12.6.2.2, “LOAD DATA FROM MASTER Syntax”, for recommended alternatives. (Bug#9125, Bug#20596, Bug#14399, Bug#12187, Bug#15025, Bug#18822)

MySQL Cluster: Packaging: 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)

MySQL Cluster: Backup of a cluster failed if there were any tables with 128 or more columns. (Bug#23502)

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

MySQL Cluster: If a node restart could not be performed from the REDO log, no node takeover took place. This could cause partitions to be left empty during a system restart. (Bug#22893)

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

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

MySQL Cluster: 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)

MySQL Cluster: The node recovery algorithm was missing a version check for tables in the ALTER_TABLE_COMMITTED state (as opposed to the TABLE_ADD_COMMITTED state, which has the version check). This could cause inconsistent schemas across nodes following node recovery. (Bug#21756)

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

MySQL Cluster: The output for the --help option used with NDB executable programs (such as ndbd, ndb_mgm, ndb_restore, ndb_config, and others mentioned in Section 15.10, “Cluster Utility Programs”) referred to the Ndb.cfg file, instead of to my.cnf. (Bug#21585)

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

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

MySQL 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)

MySQL Cluster: Attempting to create an NDB table on a MySQL with an existing non-Cluster table with the same name in the same database could result in data loss or corruption. MySQL now issues a warning when a SHOW TABLES or other statement causing table discovery finds such a table. (Bug#21378)

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

MySQL Cluster: 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 the same node group to shut down. (Bug#21213)

MySQL Cluster: The ndb_size.pl script did not account for TEXT and BLOB column values correctly. (Bug#21204)

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

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

MySQL 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)

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

MySQL 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)

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

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

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

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

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

MySQL Cluster: A problem with takeover during a system restart caused ordered indexes to be rebuilt incorrectly. (Bug#15303)

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)

REPAIR TABLE ... USE_FRM could cause a server crash or hang when used for a MyISAM table in a database other than the default database. (Bug#22562)

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)

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)

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

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

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)

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

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

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

(Bug#21787)

Redundant binary log LAST_INSERT_ID events could be generated; LAST_INSERT_ID(expr) did not return the value of expr; LAST_INSERT_ID() could return the value generated by the current statement if the call occurred after value generation, as in:

CREATE TABLE t1 (i INT AUTO_INCREMENT PRIMARY KEY, j INT);
INSERT INTO t1 VALUES (NULL, 0), (NULL, LAST_INSERT_ID());

(Bug#21726)

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)

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

EXPORT_SET() did not accept arguments with coercible character sets. (Bug#21531)

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

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

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

Within a prepared statement, SELECT (COUNT(*) = 1) (or similar use of other aggregate functions) did not return the correct result for statement re-execution. (Bug#21354)

In the package of pre-built time zone tables that is available for download at 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)

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. (Bug#21206)

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

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

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)

For InnoDB tables, the server could crash when executing NOT IN(...) subqueries. (Bug#21077)

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

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)

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)

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 ALTER TABLE to add an ENUM column with an enumeration value containing 0xFF caused the name of the first table column to be lost. (Bug#20922)

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

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

mysql_install_db incorrectly had a blank first line. (Bug#20721)

Character set collation was ignored in GROUP BY clauses. (Bug#20709)

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)

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)

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

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

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

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

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)

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

libmysqld returned TEXT columns to the client as number of bytes, not number of characters (which can be different for multi-byte character sets). (Bug#19983)

For TIME_FORMAT(), the %H and %k format specifiers can return values larger than two digits (if the hour is greater than 99), but for some query results that contained three-character hours, column values were truncated. (Bug#19844)

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)

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

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)

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)

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

Using > ALL with subqueries that return no rows yielded incorrect results under certain circumstances due to incorrect application of MIN()/MAX() optimization. (Bug#18503)

Multiple invocations of the REVERSE() function could return different results. (Bug#18243)

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)

Views could not be updated within a stored function or trigger. (Bug#17591)

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)

Use of the join cache in favor of an index for ORDER BY operations could cause incorrect result sorting. (Bug#17212)

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

Conversion of TIMESTAMP values between UTC and the local time zone resulted in some values having the year 2069 rather than 1969. (Bug#16327)

Using ANY with “non-table” subqueries such as SELECT 1 yielded incorrect results under certain circumstances due to incorrect application of MIN()/MAX() optimization. (Bug#16302)

Parallel builds occasionally failed on Solaris. (Bug#16282)

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

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)

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

The use of WHERE col_name IS NULL in SELECT statements reset the value of LAST_INSERT_ID() to zero. (Bug#14553)

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

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

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

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)

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

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)

DELETE with WHERE condition on a BTREE-indexed column for a MEMORY table deleted only the first matched row. (Bug#9719)

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

As a result of this change, the MYSQL_OPT_READ_TIMEOUT and MYSQL_OPT_WRITE_TIMEOUT options for mysql_options() now apply to TCP/IP connections on all platforms. Previously, they applied only to Windows. (Bug#9678)

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)

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

The result for CAST() when casting a value to UNSIGNED was limited to the maximum signed BIGINT value (9223372036854775808), rather than the maximum unsigned value (18446744073709551615). (Bug#8663)

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

For cross-database multiple-table UPDATE statements, a user with all privileges for the default database could update tables in another database for which the user did not have UPDATE privileges. (Bug#7391)

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

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

A patch fixing the omission of leading zeros in dates in MySQL 4.1.21 was reverted.

The patch for the following bugs was reverted: Bug#16377.