MySQL Cluster: The behavior of the ndb_restore utility has been changed as follows:

For details of these changes, see Section 19.9.3, “ndb_restore — Restore a Cluster Backup”. (Bug#26899, Bug#26900)

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

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

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

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

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

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

This is a new fix for this issue, and replaces the fix made in MySQL 5.0.25 and reverted in 5.0.26. (Bug#21174)

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

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

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

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

For more information about condition handlers and writing them to avoid invalid jumps, see Section 21.2.10.2, “DECLARE Handlers”. (Bug#26503)

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

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

MySQL Cluster: Under certain rare circumstances performing a DROP TABLE or TRUNCATE on an NDB table could cause a node failure or forced cluster shutdown. (Bug#27581)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

(Bug#21715)

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

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

Replication: Out-of-memory errors were not reported. Now they are written to the error log. (Bug#26844)

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

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

Cluster API: After defining a delete operation (using NdbOperation::deleteTuple()) on a nonexistent primary key of a table having a BLOB or TEXT column, invoking NdbTransaction::execute() caused the calling application to enter an endless loop rather than raising an error.

This issue also affected ndb_restore; when restoring tables containing BLOB or TEXT columns, this could cause it to consume all available memory and then crash. (Bug#24028)

See also Bug#27308, Bug#30177

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

See also Bug#27210, Bug#27006

This regression was introduced by Bug#19978

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

InnoDB: The first read statement, if served from the query cache, was not consistent with the READ COMMITTED isolation level. (Bug#21409)

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

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

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