MySQL

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MySQL 5.0.67



MySQL is a multithreaded, multi-user, SQL Database Management System (DBMS).


Features:

* A broad subset of ANSI SQL 99, as well as extensions
* Cross-platform support
* Stored procedures
* Triggers
* Cursors
* updatable Views
* True VARCHAR support
* INFORMATION_SCHEMA
* Strict mode
* X/Open XA distributed transaction processing (DTP) support; two phase commit as part of this, using Oracle's InnoDB engine
* Independent storage engines (MyISAM for read speed, InnoDB for transactions and referential integrity, Archive for storing historical data in little space)
* Transactions with the InnoDB, BDB and Cluster storage engines; savepoints with InnoDB
* SSL support
* Query caching
* Sub-SELECTs (i.e. nested SELECTs)
* Replication with one master per slave, many slaves per master, no automatic support for multiple masters per slave.
* Full-text indexing and searching using MyISAM engine
* Embedded database library
* Full Unicode support
* ACID compliance using the InnoDB, BDB and Cluster engines
* Shared-nothing clustering through MySQL Cluster



Download: http://dev.mysql.com/downloads/

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MySQL 5.1.40



Bugs fixed:

* Incompatible Change: In binary installations of MySQL, the supplied binary-configure script would start and configure MySQL, even when request help on the command with the --help command-line option. The --help, if provided, will no longer start and install the server. (Bug#30954)

* Partitioning: When reorganizing partitions, not all affected subpartitions were removed prior to renaming. One way in which the issue was visible was that attempting to reorganize two partitions into a single partition having the same name as one of the original partitions could lead to a crash of the server. (Bug#47029)
See also Bug#45961, Bug#43729.

* Partitioning: An online or fast ALTER TABLE of a partitioned table could leave behind temporary files in the database directory. (Bug#46483)

* Partitioning: When performing an INSERT ... SELECT into a partitioned table, read_buffer_size bytes of memory were allocated for every partition in the target table, resulting in consumption of large amounts of memory when the table had many partitions (more than 100).
This fix changes the method used to estimate the buffer size required for each partition and limits the total buffer size to a maximum of approximately 10 times read_buffer_size. (Bug#45840)

* Partitioning: Inserting negative values into an AUTO_INCREMENT column of a partitioned table could lead to apparently unrelated errors or a crash of the server. (Bug#45823)

* Partitioning: Unnecessary calls were made in the server code for performing bulk inserts on partitions for which no inserts needed to be made. (Bug#35845)See also Bug#35843.

* Replication: Performing ALTER TABLE ... DISABLE KEYS on a slave table caused row-based replication to fail. (Bug#47312)

* Replication: BEGIN statements were not included in the output of mysqlbinlog. (Bug#46998)

* Replication: When using row-based replication, importing a dump made with mysqldump and replicating a row with an AUTO_INCREMENT column set to 0, with NO_AUTO_VALUE_ON_ZERO active on the master, the row was inserted successfully on the master; however any setting for NO_AUTO_VALUE_ON_ZERO was ignored on the slave. When the AUTO_INCREMENT column was incremented, this caused replication to fail on the slave due to a duplicate key error. In some cases it could also cause the slave to crash. (Bug#45999)

* Replication: Concurrent transactions that inserted rows into a table with an AUTO_INCREMENT column could break statement-based or mixed-format replication error 1062 Duplicate entry '...' for key 'PRIMARY' on the slave. This was especially likely to happen when one of the transactions activated a trigger that inserted rows into the table with the AUTO_INCREMENT column, although other conditions could also cause the issue to manifest. (Bug#45677)

* Replication: By default, all statements executed by the mysql_upgrade program on the master are written to the binary log, then replicated to the slave. In some cases, this can result in problems; for example, it attempted to alter log tables on replicated databases (this failed due to logging being enabled).
As part of this fix, a new mysql_upgrade option --write-binlog is added. Its inverse, --skip-write-binlog, can be used to disable binary logging while the upgrade is in progress. (Bug#43579)

* Replication: On the master, if a binary log event is larger than max_allowed_packet, the error message ER_MASTER_FATAL_ERROR_READING_BINLOG is sent to a slave when it requests a dump from the master, thus leading the I/O thread to stop. On a slave, the I/O thread stops when receiving a packet larger than max_allowed_packet.
In both cases, however, there was no Last_IO_Error reported, which made it difficult to determine why the slave had stopped in such cases. Now, Last_IO_Error is reported when max_allowed_packet is exceeded, and provides the reason for which the slave I/O thread stopped. (Bug#42914) See also Bug#14068, Bug#47200, Bug#47303.

* API: The fix for Bug#24507 could lead in some cases to client application failures due to a race condition. Now the server waits for the “dummy” thread to return before exiting, thus making sure that only one thread can initialize the POSIX threads library. (Bug#42850)

* The pthread_cond_wait() implementations for Windows could deadlock in some rare circumstances. (Bug#47768)

* On Mac OS X or Windows, sending a SIGHUP signal to the server or an asynchronous flush (triggered by flush_time) caused the server to crash. (Bug#47525)

* Debug builds could not be compiled with the Sun Studio compiler. (Bug#47474)

* A multiple-table UPDATE involving a natural join and a mergeable view raised an assertion. (Bug#47150)

* Solaris binary packages now are compiled with -g0 rather than -g. (Bug#47137)

* EXPLAIN caused a server crash for certain valid queries. (Bug#47106)

* The configure option --without-server did not work. (Bug#46980)

* ailed multiple-table DELETE statements could raise an assertion. (Bug#46958)

* When creating a new instance on Windows using mysqld-nt and the --install parameter, the value of the service would be set incorrectly, resulting in a failure to start the configured service. (Bug#46917)

* The server crashed when re-using outer column references in correlated subqueries when the enclosing query used a temp table. (Bug#46791)

* Assertion failure could result from repeated execution of a stored procedure containing an incorrect query with a subselect. (Bug#46629)

* The server ignored the setting of sync_frm for CREATE TABLE ... LIKE. (Bug#46591)

* An attempt to create a table with the same name as an existing view could cause a server crash. (Bug#46384)

* A parser problem prevented properly stripping backquotes from an argument to a user-defined function (UDF). If the UDF was in an ORDER BY clause, its name would not be properly resolved against an alias with the same name in the select list. (Bug#46259)

* Dropping an InnoDB table that used an unknown collation (created on a different server, for example) caused a server crash. (Bug#46256)

* Certain SELECT statements containing DISTINCT, GROUP BY, and HAVING clauses could hang in an infinite loop. (Bug#46159)

* InnoDB did not disallow creation of an index with the name GEN_CLUST_INDEX, which is used internally. (Bug#46000)

* CREATE TEMPORARY TABLE failed for InnoDB tables on systems with case-insensitive file systems when lower_case_table_names = 2 and the pathname of the temporary file directory contained uppercase characters. (Bug#45638)

* Appending values to an ENUM or SET definition is a metadata change for which ALTER TABLE need not rebuild the table, but it was being rebuilt anyway. (Bug#45567)

* The socket system variable was unavailable on Windows. (Bug#45498)

* When re-installing MySQL on Windows on a server that has a data directory from a previous MySQL installation, the installer would fail to identify the existence of the installation and the password configured for the root user. (Bug#45200)

* Client flags were incorrectly initialized for the embedded server, causing several tests in the jp test suite to fail. (Bug#45159)

* InnoDB did not always disallow creating tables containing columns with names that match the names of internal columns, such as DB_ROW_ID, DB_TRX_ID, DB_ROLL_PTR, and DB_MIX_ID. (Bug#44369)

* SELECT ... WHERE ... IN (NULL, ...) was executed using a full table scan, even if the same query without the NULL used an efficient range scan. (Bug#44139) See also Bug#18360.

* InnoDB use of SELECT MAX(autoinc_column) could cause a crash when MySQL data dictionaries went out of sync. (Bug#44030)

* LOAD DATA INFILE statements were written to the binary log in such a way that parsing problems could occur when re-executing the statement from the log. (Bug#43746)

* Selecting from the process list in the embedded server caused a crash. (Bug#43733) See also Bug#47304.

* Attempts to enable large_pages with a shared memory segment larger than 4GB caused a server crash. (Bug#43606)

* A test for stack growth failed on some platforms, leading to server crashes. (Bug#42213)

* MySQL server used the wrong lock type (always TL_READ instead of TL_READ_NO_INSERT when appropriate) for tables used in subqueries of UPDATE statements. This led in some cases to replication failure because statements were written in the wrong order to the binary log. (Bug#42108)

* The mysql-stress-test.pl test script was missing from the noinstall packages on Windows. (Bug#41546)

* Privileges for SHOW CREATE VIEW were not being checked correctly. (Bug#35996)

* Different invocations of CHECKSUM TABLE could return different results for a table containing columns with spatial data types. (Bug#35570)

* myisamchk performed parameter value casting at startup that generated unnecessary warning messages. (Bug#33785)

* When building MySQL on Windows from source, the WITH_BERKELEY_STORAGE_ENGINE option would fail to configure BDB support correctly. (Bug#27693)




Download: http://www.mysql.com/

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MySQL 5.1.41



# Functionality added or changed:

* The InnoDB buffer pool is divided into two sublists: A new sublist containing blocks that are heavily used by queries, and an old sublist containing less-used blocks and from which candidates for eviction are taken. In the default operation of the buffer pool, a block when read in is loaded at the midpoint and then moved immediately to the head of the new sublist as soon as an access occurs. In the case of a table scan (such as performed for a mysqldump operation), each block read by the scan ends up moving to the head of the new sublist because multiple rows are accessed from each block. This occurs even for a one-time scan, where the blocks are not otherwise used by other queries. Blocks may also be loaded by the read-ahead background thread and then moved to the head of the new sublist by a single access. These effects can be disadvantageous because they push blocks that are in heavy use by other queries out of the new sublist to the old sublist where they become subject to eviction.

InnoDB Plugin now provides two system variables that enable LRU algorithm tuning:

- innodb_old_blocks_pct

Specifies the approximate percentage of the buffer pool used for the old block sublist. The range of values is 5 to 95. The default value is 37 (that is, 3/8 of the pool).

- innodb_old_blocks_time

Specifies how long in milliseconds (ms) a block inserted into the old sublist must stay there after its first access before it can be moved to the new sublist. The default value is 0: A block inserted into the old sublist moves immediately to the new sublist the first time it is accessed, no matter how soon after insertion the access occurs. If the value is greater than 0, blocks remain in the old sublist until an access occurs at least that many ms after the first access. For example, a value of 1000 causes blocks to stay in the old sublist for 1 second after the first access before they become eligible to move to the new sublist. See Section 7.4.6, “The InnoDB Buffer Pool”

For additional information, see Section 7.4.6, “The InnoDB Buffer Pool”. (Bug#45015)

* For InnoDB Plugin, two new status variables have been added to SHOW STATUS output. Innodb_buffer_pool_read_ahead and Innodb_buffer_pool_read_ahead_evicted indicate the number of pages read in by the InnoDB read-ahead background thread, and the number of such pages evicted without ever being accessed, respectively. Also, the status variables Innodb_buffer_pool_read_ahead_rnd and Innodb_buffer_pool_read_ahead_seq status variables have been removed.

The built-in version of InnoDB is not affected by these changes. (Bug#42885)

* InnoDB Plugin has been upgraded to version 1.0.5. This version is considered of Release Candidate (RC) quality.

* The server now supports a Debug Sync facility for thread synchronization during testing and debugging. To compile in this facility, configure MySQL with the --enable-debug-sync option. The debug_sync system variable provides the user interface Debug Sync. mysqld and mysql-test-run.pl support a --debug-sync-timeout option to enable the facility and set the default synchronization point timeout

# Bugs fixed:

* Important Change: Security Fix: Additional corrections were made for the symlink-related privilege problem originally addressed in MySQL 5.1.24. The original fix did not correctly handle the data directory path name if it contained symlinked directories in its path, and the check was made only at table-creation time, not at table-opening time later. (Bug#32167, CVE-2008-2079)
See also Bug#39277.

* Security Fix: MySQL clients linked against OpenSSL did not check server certificates presented by a server linked against yaSSL. (Bug#47320)

* Partitioning: An ALTER TABLE ... ADD PARTITION statement that caused open_files_limit to be exceeded led to a crash of the MySQL server. (Bug#46922)
See also Bug#47343.

* Partitioning: The cardinality of indexes on partitioned tables was calculated using the first partition in the table, which could result in suboptimal query execution plans being chosen. Now the partition having the most records is used instead, which should result in better use of indexes and thus improved performance of queries against partitioned tables in many if not most cases. (Bug#44059)

* Replication: This issue occurred in MySQL 5.1.40 only. (Bug#48297)

*Replication: When a session was closed on the master, temporary tables belonging to that session were logged with the wrong database names when either of the following conditions was true:

1. The length of the name of the database to which the temporary table belonged was greater than the length of the current database name.
2. The current database was not set.(Bug#48216)
See also Bug#46861, Bug#48297.

* Replication: When using row-based replication, changes to non-transactional tables that occurred early in a transaction were not immediately flushed upon committing a statement. This behavior could break consistency since changes made to non-transactional tables become immediately visible to other connections. (Bug#47678)
See also Bug#47287, Bug#46864, Bug#43929, Bug#46129.

* Replication: When mysqlbinlog --verbose was used to read a binary log that had been recorded using the row-based format, the output for events that updated some but not all columns of tables was not correct. (Bug#47323)

* Replication: When using the row-based format to replicate a transaction involving both transactional and non-transactional engines, which contained a DML statement affecting multiple rows, the statement failed; if this transaction was followed by a COMMIT, the master and the slave could diverge, because the statement was correctly rolled back on the master, but was applied on the slave. (Bug#47287)
See also Bug#46864.

* Replication: A problem with the BINLOG statement in the output of mysqlbinlog could break replication; statements could be logged with the server ID stored within events by the BINLOG statement rather than the ID of the running server. With this fix, the server ID of the server executing the statements can no longer be overridden by the server ID stored in the binary log's format description statement. (Bug#46640)
This regression was introduced by Bug#32407.

* Replication: When using statement-based replication and the transaction isolation level was set to READ COMMITTED or a less strict level, InnoDB returned an error even if the statement in question was filtered out according to the --binlog-do-db or --binlog-ignore-db rules in effect at the time. (Bug#42829)

* Replication: FLUSH LOGS did not actually close and reopen the binary log index file. (Bug#34582)

* SUM() artificially increased the precision of a DECIMAL argument, which was truncated when a temporary table was created to hold the results. (Bug#48370)
See also Bug#45261.

* If an outer query was invalid, a subquery might not even be set up. EXPLAIN EXTENDED did not expect this and caused a crash by trying to dereference improperly set up information. (Bug#48295)

* A query containing a view using temporary tables and multiple tables in the FROM clause and PROCEDURE ANALYSE() caused a server crash.
As a result of this bug fix, PROCEDURE ANALYSE() is legal only in a top-level SELECT. (Bug#48293)
See also Bug#46184.

* Error handling was missing for SELECT statements containing subqueries in the WHERE clause and that assigned a SELECT result to a user variable. The server could crash as a result. (Bug#48291)

* An assertion could fail if the optimizer used a SPATIAL index. (Bug#48258, Bug#47019)

* Memory-allocation failures were handled incorrectly in the InnoDB os_mem_alloc_large() function. (Bug#48237)
* WHERE clauses with outer_value_list NOT IN subquery were handled incorrectly if the outer value list contained multiple items at least one of which could be NULL. (Bug#48177)

* A combination of GROUP BY WITH ROLLUP, DISTINCT and the const join type in a query caused a server crash when the optimizer chose to employ a temporary table to resolve DISTINCT. (Bug#48131)

* In some cases, using a null microsecond part in a WHERE condition (for example, WHERE date_time_field <= 'YYYY-MM-DD HH:MM:SS.0000') could lead to incorrect results due to improper DATETIME comparison. (Bug#47963)

* A build configured using the --without-server option did not compile the yaSSL code, so if --with-ssl was also used, the build failed. (Bug#47957)

* mysys/mf_keycache.c requires threading, but no test was made for thread support. (Bug#47923)

* For debug builds, an assertion could fail during the next statement executed for a temporary table after a multiple-table UPDATE involving that table and modified an AUTO_INCREMENT column with a user-supplied value. (Bug#47919)

* The mysys/mf_strip.c file, which defines the strip_sp has been removed from the MySQL source. The function was no longer in use within the main build, and the supplied function was causing symbol errors on Windows builds. (Bug#47857)

* The Windows build for MySQL would compile the split.c and debug.c files unnecessarily, causing additional symbols to be included in mysqld. (Bug#47850)

* When building storage engines on Windows it was not possible to specify additional libraries within the CMake file required for the build. An ${engine}_LIBS macro has been added to the files to support these additional storage-engine specific libraries. (Bug#47797)

* When building a pluggable storage engine on Windows, the engine name could be based on the directory name where the engine was located, rather than the configured storage engine name. (Bug#47795)

* During cleanup of a stored procedure's internal structures, the flag to ignore the errors for INSERT IGNORE or UPDATE IGNORE was not cleaned up, which could result in a server crash. (Bug#47788)

* If the first argument to GeomFromWKB() function was a geometry value, the function just returned its value. However, it failed to preserve the argument's null_value flag, which caused an unexpected NULL value to be returned to the caller, resulting in a server crash. (Bug#47780)

* InnoDB could crash when updating spatial values. (Bug#47777)

* On WIndows, when an idle named pipe connection was forcibly closed with a KILL statement or because the server was being shut down, the thread that was closing the connection would hang infinitely. (Bug#47571, Bug#31621)

* A function call could end without throwing an error or setting the return value. For example, this could happen when an error occurred while calculating the return value. This is fixed by setting the value to NULL when an error occurs during evaluation of an expression. (Bug#47412)

* A simple SELECT with implicit grouping could return many rows rather than a single row if the query was ordered by the aggregated column in the select list. (Bug#47280)

* An assertion could be raised for CREATE TABLE if there was a pending INSERT DELAYED or REPLACE DELAYED for the same table. (Bug#47274)

* Incorrect handling of predicates involving NULL by the range optimizer could lead to to an infinite loop during query execution. (Bug#47123)

* Repair by sort or parallel repair of MyISAM tables could fail to fail over to repair with key cache. (Bug#47073)

* On WIndows, when a failed I/O operation occurred with return code of ERROR_WORKING_SET_QUOTA, InnoDB intentionally crashed the server. Now InnoDB sleeps for 100ms and retries the failed operation. (Bug#47055)

* When MySQL crashed (or a snapshot was taken that simulates a crash), it was possible that internal XA transactions (used to synchronize the binary log and InnoDB) could be left in a PREPARED state, whereas they should be rolled back. This occurred when the server_id value changed before the restart, because that value was used to construct XID values.

Now the restriction is relaxed that the server_id value be consistent for XID values to be considered valid. The rollback phase should then be able to clean up all pending XA transactions. (Bug#46944)

* If InnoDB Plugin reached its limit on the number of concurrent transactions (1023), it wrote a descriptive message to the error log but returned a misleading error message to the client, or an assertion failure occurred. (Bug#46672)
See also Bug#18828.

* Concurrent INSERT INTO ... SELECT statements for an InnoDB table could cause an AUTO_INCREMENT assertion failure. (Bug#46650)

* If a transaction was rolled back inside InnoDB due to a deadlock or lock wait timeout, and a statement in the transaction had an IGNORE clause, the server could crash at the end of the statement or on shutdown. (Bug#46539)

* Trailing spaces were not ignored for user-defined collations that mapped spaces to a character other than 0x20. (Bug#46448)
See also Bug#29468.

* The GPL and commercial license headers had different sizes, so that error log, backtrace, core dump, and cluster trace file line numbers could be off by one if they were not checked against the version of the source used for the build. (For example, checking a GPL build backtrace against commercial sources.) (Bug#46216)

* InnoDB did not disallow creation of an index with the name GEN_CLUST_INDEX, which is used internally. (Bug#46000)

* During the build of the Red Hat IA64 MySQL server RPM, the system library link order was incorrect. This made the resulting Red Hat IA64 RPM depend on "libc.so.6.1(GLIBC_PRIVATE)(64bit)", thus preventing installation of the package. (Bug#45706)

* The caseinfo member of the CHARSET_INFO structure was not initialized for user-defined Unicode collations, leading to a server crash. (Bug#45645)

* With InnoDB Plugin, renaming a table column and then creating an index on the renamed column caused a server crash to to the .frm file and the InnoDB data directory going out of sync. Now InnoDB Plugin 1.0.5 returns an error instead: ERROR 1034 (HY000): Incorrect key file for table 'tbl_name'; try to repair it. To work around the problem, create another table with the same structure and copy the original table to it. (Bug#44571)

* An InnoDB error message incorrectly referred to the nonexistent innodb_max_files_open variable rather than to innodb_open_files. (Bug#44338)

* For ALTER TABLE, renaming a DATETIME or TIMESTAMP column unnecessarily caused a table copy operation. (Bug#43508)

* The weekday names for the Romanian lc_time_names locale 'ro_RO' were incorrect. Thanks to Andrei Boros for the patch to fix this bug. (Bug#43207)

* XA START could cause an assertion failure or server crash when it is called after a unilateral rollback issued by the Resource Manager (both in a regular transaction and after an XA transaction). (Bug#43171)

* The FORCE INDEX FOR ORDER BY index hint was ignored when join buffering was used. (Bug#43029)

* Incorrect handling of range predicates combined with OR operators could yield incorrect results. (Bug#42846)

* Failure to treat BIT values as unsigned could lead to unpredictable results. (Bug#42803)

* For the embedded server on Windows, InnoDB crashed when innodb_file_per_table was enabled and a table name was in full path format. (Bug#42383)

* In a replication scenario with innodb_locks_unsafe_for_binlog enabled on the slave, where rows were changed only on the slave (not through replication), in some rare cases, many messages of the following form were written to the slave error log: InnoDB: Error: unlock row could not find a 4 mode lock on the record. (Bug#41756)

* With a nonstandard InnoDB page size, some error messages became inaccurate. (Bug#41490)

* Simultaneous ANALYZE TABLE operations for an InnoDB tables could be subject to a race condition. (Bug#38996)

* Previously, InnoDB performed REPLACE INTO T SELECT ... FROM S WHERE ... by setting shared next-key locks on rows from S. Now InnoDB selects rows from from S with shared locks or as a consistent read, as for INSERT ... SELECT. This reduces lock contention between sessions. (Bug#37232)

* When an InnoDB tablespace filled up, an error was logged to the client, but not to the error log. Also, the error message was misleading and did not indicate the real source of the problem. (Bug#31183)

* In mysql, using Control-C to kill the current query resulted in a ERROR 1053 (08S01): Server shutdown in progress" message if the query was waiting for a lock. (Bug#28141)





Download: http://www.mysql.com/

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MySQL 5.0.89




# Bugs fixed:

* Privileges for stored routines were ignored for mixed-case routine names. (Bug#48872) See also Bug#41049.
* Building MySQL on Fedora Core 12 64-bit would due to errors in comp_err. (Bug#48864)
* DISTINCT was ignored for queries with GROUP BY WITH ROLLUP and only const tables. (Bug#48475)
* Loose index scan was inappropriately chosen for some WHERE conditions. (Bug#48472)
* A bad typecast could cause query execution to allocate large amounts of memory. (Bug#48458)
* mysql_secure_installation did not work on Solaris. (Bug#48086)
* When running mysql_secure_installation, the command would fail if the root password contained multiple spaces, \, # or quote characters. (Bug#48031)
* InnoDB did not disallow creation of an index with the name GEN_CLUST_INDEX, which is used internally. (Bug#46000)
* Use of InnoDB monitoring (SHOW ENGINE INNODB STATUS or one of the InnoDB Monitor tables) could cause a server crash due to invalid access to a shared variable in a concurrent environment. (Bug#38883)
* Output from mysql --html did not encode the <, >, or & characters. (Bug#27884)




Download: http://www.mysql.com/

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MySQL 5.1.44




# Bugs fixed:

* Partitioning: When an ALTER TABLE ... REORGANIZE PARTITION statement on an InnoDB table failed due to innodb_lock_wait_timeout expiring while waiting for a lock, InnoDB did not clean up any temporary files or tables which it had created. Attempting to reissue the ALTER TABLE statement following the timeout could lead to storage engine errors, or possibly a crash of the server. (Bug#47343)
* Replication: In some cases, inserting into a table with many columns could cause the binary log to become corrupted. (Bug#50018). See also Bug#42749.
* Replication: When using row-based replication, setting a BIT or CHAR column of a MyISAM table to NULL, then trying to delete from the table, caused the slave to fail with the error Can't find record in table. (Bug#49481, Bug#49482)
* Replication: When logging in row-based mode, DDL statements are actually logged as statements; however, statements that affected temporary tables and followed DDL statements failed to reset the binary log format to ROW, with the result that these statements were logged using the statement-based format. Now the state of binlog_format is restored after a DDL statement has been written to the binary log. (Bug#49132)
* Replication: When using row-based logging, the statement CREATE TABLE t IF NOT EXIST ... SELECT was logged as CREATE TEMPORARY TABLE t IF NOT EXIST ... SELECT when t already existed as a temporary table. This was caused by the fact that the temporary table was opened and the results of the SELECT were inserted into it when a temporary table existed and had the same name.Now, when this statement is executed, t is created as a base table, the results of the SELECT are inserted into it — even if there already exists a temporary table having the same name — and the statement is logged correctly. (Bug#47418).See also Bug#47442.
* Replication: Due to a change in the size of event representations in the binary log, when replicating from a MySQL 4.1 master to a slave running MySQL 5.0.60 or later, the START SLAVE UNTIL statement did not function correctly, stopping at the wrong position in the log. Now the slave detects that the master is using the older version of the binary log format, and corrects for the difference in event size, so that the slave stops in the correct position. (Bug#47142)
* The SSL certificates in the test suite were about to expire. They have been updated with expiration dates in the year 2015. (Bug#50642)
* The printstack function does not exist on Solaris 8 or earlier, which would lead to a compilation failure. (Bug#50409)
* A user could see tables in INFORMATION_SCHEMA.TABLES without appropriate privileges for them. (Bug#50276)
* Debug output for join structures was garbled. (Bug#50271)
* The filesort sorting method applied to a CHAR(0) column could lead to a server crash. (Bug#49897)
* sql_buffer_result had an effect on non-SELECT statements, contrary to the documentation. (Bug#49552)
* In some cases a subquery need not be evaluated because it returns only aggregate values that can be calculated from table metadata. This sometimes was not handled by the enclosing subquery, resulting in a server crash. (Bug#49512)
* The method for comparing INFORMATION_SCHEMA names and database names was nonoptimal and an improvement was made: When the database name length is already known, a length check is made first and content comparison skipped if the lengths are unequal. (Bug#49501)
* The MD5() and SHA1() functions had excessive overhead for short strings. (Bug#49491)
* Mixing full-text searches and row expressions caused a crash. (Bug#49445)
* Creating or dropping a table with 1023 transactions active caused an assertion failure. (Bug#49238)
* mysql-test-run.pl now recognizes the MTR_TESTCASE_TIMEOUT, MTR_SUITE_TIMEOUT, MTR_SHUTDOWN_TIMEOUT, and MTR_START_TIMEOUT environment variables. If they are set, their values are used to set the --testcase-timeout, --suite-timeout, --shutdown-timeout, and --start-timeout options, respectively. (Bug#49210)

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MySQL 5.1.45



# Bugs fixed:

* Partitioning: Attempting to drop a partitioned table from one connection while waiting for the completion of an ALTER TABLE that had been issued from a different connection, and that changed the storage engine used by the table, could cause the server to crash. (Bug#42438)
* Replication: Adding an index to a table on the master caused the slave to stop logging slow queries to the slow query log. (Bug#50620)
* Replication: Queries which were written to the slow query log on the master were not written to the slow query log on the slave. (Bug#23300) See also Bug#48632.
* mysqld_multi failed due to a syntax error in the script. (Bug#51468)
* Referring to a subquery result in a HAVING clause could produce incorrect results. (Bug#50995)
* Use of filesort plus the join cache normally is preferred to a full index scan. But it was used even if the index is clustered, in which case, the clustered index scan can be faster. (Bug#50843)
* For debug builds, SHOW BINARY LOGS caused an assertion to be raised if binary logging was not enabled. (Bug#50780)
* Incorrect handling of BIT columns in temporary tables could lead to spurious duplicate-key errors. (Bug#50591)
* Full-text queries that used the truncation operator (*) could enter an infinite loop. (Bug#50351)
* mysqltest no longer lets you execute an SQL statement on a connection after doing a send command, unless you do a reap first. This was previously accepted but could produce unpredictable results. (Bug#49269)
* For debug builds on Windows, warnings about incorrect use of debugging directives were written to the error log. The directives were rewritten to eliminate these messages. (Bug#49025)
* Building MySQL on Fedora Core 12 64-bit failed, due to errors in comp_err. (Bug#48864)
* An ARZ file missing from the database directory caused the server to crash. (Bug#48757)
* Slow CALL statements were not always logged to the slow query log because execution time for multiple-statement stored procedures was assessed incorrectly. (Bug#47905)
* Failure to open a view with a nonexistent DEFINER was improperly handled and the server would crash later attempting to lock the view. (Bug#47734)
* If EXPLAIN encountered an error in the query, a memory leak occurred. (Bug#45989)
* Grouping by a subquery in a query with a DISTINCT aggregate function led to incorrect and unordered grouping values. (Bug#45640)
* Propagation of a large unsigned numeric constant in WHERE expressions could lead to incorrect results. This also affected EXPLAIN EXTENDED, which printed incorrect numeric constants in such transformed WHERE expressions. (Bug#45360)
* Valgrind warnings about uninitialized variables in optimizer code were silenced. (Bug#45195)
* flush_cache_records() did not correctly check for errors that should cause statement execution to stop, leading to a server crash. (Bug#39022)
* When building MySQL when using a different target directory (for example using the VPATH environment variable), the build of the embedded readline component would fail. (Bug#35250)
* INSERT INTO ... VALUES(DEFAULT) failed to insert the correct value for ENUM columns. For MyISAM tables, an empty value was inserted. For CSV tables, the table became corrupt. (Bug#33717)





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MySQL 5.1.47




# Bugs fixed:

* Important Change: Replication: When invoked, CHANGE MASTER TO and SET GLOBAL sql_slave_skip_counter now cause information to be written to the error log about the slave's state prior to execution of the statement. For CHANGE MASTER TO, this information includes the previous values for MASTER_HOST, MASTER_PORT, MASTER_LOG_FILE, and MASTER_LOG_POS. For SET GLOBAL SQL_SLAVE_SKIP_COUNTER, this information includes the previous values of sql_slave_skip_counter, the group relay log name, and the group relay log position. (Bug#43406, Bug#43407)
* Replication: The failure of a REVOKE statement was logged with the wrong error code, causing replication slaves to stop even when the failure was expected on the master. (Bug#51987)
* Certain path names passed to LOAD_FILE() could cause a server crash. (Bug#53417)
* When reporting a foreign key constraint violation during INSERT, InnoDB could display uninitialized data for the DB_TRX_ID and DB_ROLL_PTR system columns. (Bug#53202)
* InnoDB page splitting could enter an infinite loop for compressed tables. (Bug#52964)
* An overly strict assertion could fail during the purge of delete-marked records in DYNAMIC or COMPRESSED InnoDB tables that contain column prefix indexes. (Bug#52746)
* InnoDB attempted to choose off-page storage without ensuring that there was an “off-page storage” flag in the record header. To correct this, in DYNAMIC and COMPRESSED formats, InnoDB stores locally any non-BLOB columns having a maximum length not exceeding 256 bytes. This is because there is no room for the “external storage” flag when the maximum length is 255 bytes or less. This restriction trivially holds in REDUNDANT and COMPACT formats, because there InnoDB always stores locally columns having a length up to local_len = 788 bytes. (Bug#52745)
* Setting @@GLOBAL.debug to an empty string failed to clear the current debug settings. (Bug#52629)
* A memory leak occurred due to missing deallocation of the comparators array (a member of the Arg_comparator class). (Bug#52124)
* For debug builds, creating a view containing a subquery that might require collation adjustment caused an assertion to be raised. For example, this could occur if some items had different collations but the result collation could be adjusted to the one of them. (Bug#52120)
* Connections waiting for an InnoDB row lock ignored KILL until the row lock wait ended. Now, KILL during lock wait results in “query interrupted” instead of “lock wait timeout exceeded”. (Bug#51920)
* Locking involving the LOCK_plugin, LOCK_global_system_variables, and LOCK_status mutexes could deadlock. (Bug#51591)
* InnoDB fast index creation could incorrectly use a table copy in some cases. (Bug#50946)
* A syntactically invalid trigger could cause the server to crash when trying to list triggers. (Bug#50755)
* InnoDB Plugin checks to see whether a row could possibly exceed the maximum size if all columns are fully used. This produced Row size too large errors for some tables that could be created with the built-in InnoDB. Now the check is only done when innodb_strict_mode is enabled or if the table is dynamic or compressed. (Bug#50495)
* On Windows, the server failed to find a description for Event ID 100. (Bug#48042)
* For updates to InnoDB tables, TIMESTAMP columns could be updated even when no values actually changed. (Bug#47453)
* If the server is started with --skip-grant-tables, plugin loading and unloading should be disallowed, but the server failed to reject INSTALL PLUGIN and UNINSTALL PLUGIN statements. (Bug#46261)
* Storage engine plugins on Windows could've been built with a definition of time_t which was different from the server expectations. The difference could cause affected plugins to crash. In addition, the use of the time_t type in the storage engine API layer has been enforced. (Bug#39802, Bug#40092)
* When using UNINSTALL PLUGIN to remove a loaded plugin, open tables and connections caused mysqld to hang until the open connections had been closed. (Bug#39053)
* 1) In rare cases, if a thread was interrupted during a FLUSH PRIVILEGES operation, a debug assertion occurred later due to improper diagnostic area setup. 2) A KILL operation could cause a console error message referring to a diagnostic area state without first ensuring that the state existed. (Bug#33982)





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MySQL 5.1.48




# Bugs fixed:

* Important Change: Replication: MyISAM transactions replicated to a transactional slave left the slave in an unstable condition. This was due to the fact that, when replicating from a nontransactional storage engine to a transactional engine with autocommit turned off, no BEGIN and COMMIT statements were written to the binary log; thus, on the slave, a never-ending transaction was started. The fix for this issue includes enforcing autocommit mode on the slave by replicating all autocommit=1 statements from the master. (Bug#29288)
* Partitioning: ALTER TABLE statements that cause table partitions to be renamed or dropped (such as ALTER TABLE ... ADD PARTITION, ALTER TABLE ... DROP PARTITION, and ALTER TABLE ... REORGANIZE PARTITION) — when run concurrently with queries against the INFORMATION_SCHEMA.PARTITIONS table — could fail, cause the affected partitioned tables to become unusable, or both. This was due to the fact that the INFORMATION_SCHEMA database ignored the name lock imposed by the ALTER TABLE statement on the partitions affected. In particular, this led to problems with InnoDB tables, because InnoDB would accept the rename operation, but put it in a background queue, so that subsequent rename operations failed when InnoDB was unable to find the correct partition. Now, INFORMATION_SCHEMA honors name locks imposed by ongoing ALTER TABLE statements that cause partitions to be renamed or dropped. (Bug#50561) See also Bug#47343, Bug#45808.
* Partitioning: It was possible to execute a CREATE TEMPORARY TABLE tmp LIKE pt statement, where pt is a partitioned table, even though partitioned temporary tables are not permitted, which caused the server to crash. Now a check is performed to prevent such statements from being executed. (Bug#49477)
* Partitioning: When attempting to perform DDL on a partitioned table and the table's .par file could not be found, the server returned the inaccurate error message Out of memory; restart server and try again (needed 2 bytes). Now in such cases, the server returns the error Failed to initialize partitions from .par file. (Bug#49161)
* Replication: In some cases, attempting to update a column with a value of an incompatible type resulted in a mismatch between master and slave because the column value was set to its implicit default value on the master (as expected), but the same column on the slave was set to NULL. (Bug#52868)
* Replication: When using a non-transactional table on the master with autocommit disabled, no COMMIT was recorded in the binary log following a statement affecting this table. If the slave's copy of the table used a transactional storage engine, the result on the slave was as though a transaction had been started, but never completed. (Bug#49522) See also Bug#29288.
* Replication: Reading from a table that used a self-logging storage engine and updating a table that used a transactional engine (such as InnoDB) generated changes that were written to the binary log using statement format which could make slaves diverge. However, when using mixed logging format, such changes should be written to the binary log using row format. (This issue did not occur when reading from tables using a self-logging engine and updating MyISAM tables, as this was already handled by checking for combinations of non-transactional and transactional engines.) Now such statements are classified as unsafe, and in mixed mode, cause a switch to row-based logging. (Bug#49019)
* Valgrind warnings resulting from passing incomplete DATETIME values to the TIMESTAMP() function were corrected. (Bug#53942)
* Builds of the embedded mysqld would fail due to a missing element of the struct NET. (Bug#53908)
* UPDATE on an InnoDB table modifying the same index that was used to satisfy the WHERE condition could trigger a debug assertion under some circumstances. (Bug#53830)
* For single-table DELETE statements that used quick select and index scan simultaneously caused a server crash or assertion failure. (Bug#53450)
* Incorrect results could be returned for LEFT JOIN of InnoDB tables with an impossible WHERE condition. (Bug#53334)
* Fixed a checksum error reported for compressed tables when the --innodb_checksums option is enabled. (Bug#53248)
* Corrected the handling of the setting innodb_change_buffering=default. (The appropriate default value is different between MySQL 5.1 and 5.5.) (Bug#53165)
* mysqldump and SELECT ... INTO OUTFILE truncated long BLOB and TEXT values to 766 bytes. (Bug#53088)
* DBUG code could in some cirsumstances call FreeState() twice, leading to a server crash or failure. (Bug#52884)
* Aggregate functions could incorrectly return NULL in outer join queries. (Bug#52051)
* The Loose Index Scan optimization method assumed that it could on the storage engine to maintain interval endpoint information, which was not true for the partitioning engine. (Bug#50939)
* Calculation of intervals for Event Scheduler events was not portable. (Bug#50087)
* Selecting from INFORMATION_SCHEMA.ROUTINES or INFORMATION_SCHEMA.PARAMETERS resulted in a memory leak. (Bug#48729)
* When the transaction isolation level was REPEATABLE READ and binary logging used statement or mixed format, SELECT statements with subqueries referencing InnoDB tables unnecessarily acquired shared locks on rows in these tables. (Bug#46947)
* Using an initial command with mysql_options(..., MYSQL_INIT_COMMAND, ...) that generated multiple result sets (such as a stored procedure or a multi-statement command) left the connection unusable. (Bug#42373)
* If a crash occurs while creating an index using the InnoDB “Fast Index Creation” mechanism, the partially created index is dropped during the crash recovery processing when the database is restarted.







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MySQL 5.1.49




# Bugs fixed:

* Replication: When using unique keys on NULL columns in row-based replication, the slave sometimes chose the wrong row when performing an update. This happened because a table having a unique key on such a column could have multiple rows containing NULL for the column used by the unique key, and the slave merely picked the first row containing NULL in that column. (Bug#53893)
* Replication: FLUSH LOGS could in some circumstances crash the server. This occurred because the I/O thread could concurrently access the relay log I/O cache while another thread was performing the FLUSH LOGS, which closes and reopens the relay log and, while doing so, initializes (or re-initializes) its I/O cache. This could cause problems if some other thread (in this case, the I/O thread) is accessing it at the same time. Now the thread performing the FLUSH LOGS takes a lock on the relay log before actually flushing it. (Bug#50364)
* An ALTER TABLE statement could convert an InnoDB compressed table (with row_format=compressed) back to an uncompressed table (with row_format=compact). (Bug#54679)
* A signal-handler redefinition for SIGUSR1 was removed. The redefinition could cause the server to encounter a kernel deadlock on Solaris when there are many active threads. Other POSIX platforms might also be affected. (Bug#54667)
* InnoDB could issue an incorrect message on startup, if tables were created under the setting innodb_file_per_table=ON and the server was restarted under the setting innodb_file_per_table=OFF. The message was of the form InnoDB: Warning: allocated tablespace n, old maximum was 0. (Bug#54658)
* The make_binary_distribution target to make could fail on some platforms because the lines generated were too long for the shell. (Bug#54590)
* The server failed to disregard sort order for some zero-length tuples, leading to an assertion failure. (Bug#54459)
* The default value of myisam_max_extra_sort_file_size could be higher than the maximum accepted value, leading to warnings upon the server start. (Bug#54457)
* If a session tried to drop a database containing a table opened with HANDLER in another session, any DATABASE statement (CREATE, DROP, ALTER) executed by that session produced a deadlock. (Bug#54360)
* Fast index creation could fail, leaving the new secondary index corrupted. (Bug#54330)
* A client could supply data in chunks to a prepared statement parameter other than of type TEXT or BLOB using the mysql_stmt_send_long_data() C API function (or COM_STMT_SEND_LONG_DATA command). This led to a crash because other data types are not valid for long data. (Bug#54041)
* Builds of the embedded mysqld would fail due to a missing element of the struct NET. (Bug#53908, Bug#53912)
* The definition of the MY_INIT macro in my_sys.h included an extraneous semicolon, which could cause compilation failure. (Bug#53906)
* A client with automatic reconnection enabled saw the error message Lost connection to MySQL server during query if the connection was lost between the mysql_stmt_prepare() and mysql_stmt_execute() C API functions. However, mysql_stmt_errno() returned 0, not the corresponding error number 2013. (Bug#53899)
* Queries that used MIN() or MAX() on indexed columns could be optimized incorrectly. (Bug#53859)
* The Lock_time value in the slow query log was negative for stored routines. (Bug#53191)
* The results of some ORDER BY ... DESC queries were sorted incorrectly. (Bug#51431)
* Index Merge between three indexes could return incorrect results. (Bug#50389)
* Performing large numbers of RENAME TABLE statements caused excessive memory use. (Bug#47991)
* The server could crash with an out of memory error when trying to parse a query that was too long to fit in memory. Now the parser rejects such queries with an ER_OUT_OF_RESOURCES error. (Bug#42064)
* Sort-index_merge for join tables other than the first table used excessive memory. (Bug#41660)
* Valgrind warnings in the InnoDB compare_record() function were corrected. (Bug#38999)
* mysqld could fail during execution when using SSL. (Bug#34236)
* The behavior of the RPM upgrade installation has changed. During an upgrade installation using the RPM packages, if the MySQL server is running when the upgrade occurs, the server is stopped, the upgrade occurs, and server is restarted. If the server is not already running when the RPM upgrade occurs, the server is not started at the end of the upgrade. The boot scripts for MySQL are installed in the appropriate directories in /etc, so the MySQL server will be restarted automatically at the next machine reboot. (Bug#27072)




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MySQL 5.1.50





# Bugs fixed:

* Important Change: Replication: The LOAD DATA INFILE statement is now considered unsafe for statement-based replication. When using statement-based logging mode, the statement now produces a warning; when using mixed-format logging, the statement is made using the row-based format. (Bug#34283)
* Partitioning: UPDATE and INSERT statements affecting partitioned tables performed poorly when using row-based replication. (Bug#52517)
* Partitioning: INSERT ON DUPLICATE KEY UPDATE statements performed poorly on tables having many partitions. This was because the handler function for reading a row from a specific index was not optimized in the partitioning handler. (Bug#52455)
* The server could crash on shutdown, if started with --innodb-use-system-malloc=0. (Bug#55581)
* GROUP BY operations used max_sort_length inconsistently. (Bug#55188)
* Building MySQL on Solaris 8 x86 failed when using Sun Studio due to gcc inline assembler code. (Bug#55061)
* In debug builds, an assertion could be raised when the server tried to send an OK packet to the client after having failed to detect errors during processing of the WHERE condition of an UPDATE statement. (Bug#54734)
* The database server could crash when renaming a table that had active transactions. (This issue only affected the database server when built for debugging.) (Bug#54453)
* The server could crash during the recovery phase of startup, if it previously crashed while inserting BLOB or other large columns that use off-page storage into an InnoDB table created with ROW_FORMAT=REDUNDANT or ROW_FORMAT=COMPACT. (Bug#54408)
* For an InnoDB table created with ROW_FORMAT=COMPRESSED or ROW_FORMAT=DYNAMIC, a query using the READ UNCOMMITTED isolation level could cause the server to stop with an assertion error, if BLOB or other large columns that use off-page storage were being inserted at the same time. (Bug#54358)
* A client could supply data in chunks to a prepared statement parameter other than of type TEXT or BLOB using the mysql_stmt_send_long_data() C API function (or COM_STMT_SEND_LONG_DATA command). This led to a crash because other data types are not valid for long data. (Bug#54041)
* mysql_secure_installation did not properly identify local accounts and could incorrectly remove nonlocal root accounts. (Bug#54004)
* Transactions could be incorrectly committed during recovery, rather than rolled back, if the server crashed and was restarted after performing ALTER TABLE...ADD PRIMARY KEY on an InnoDB table, or some other operation that involves copying the entire table. (Bug#53756)
* Portability problems in SHOW STATUS could lead to incorrect results on some platforms. (Bug#53493)
* Builds of MySQL generated a large number of warnings. (Bug#53445)
* With lower_case_table_names set to a nonzero value, searches for table or database names in INFORMATION_SCHEMA tables could produce incorrect results. (Bug#53095)
* The ABI check for MySQL failed to compile with gcc 4.5. (Bug#52514)
* mysql_secure_installation sometimes failed to locate the mysql client. (Bug#52274)
* Reading a ucs2 data file with LOAD DATA INFILE was subject to three problems. 1) Incorrect parsing of the file as ucs2 data, resulting in incorrect length of the parsed string. This is fixed by truncating the invalid trailing bytes (incomplete multibyte characters) when reading from the file. 2) Reads from a proper ucs2 file did not recognize newline characters. This is fixed by first checking whether a byte is a newline (or any other special character) before reading it as a part of a multibyte character. 3) When using user variables to hold column data, the character set of the user variable was set incorrectly to the database charset. This is fixed by setting it to the character set specified in the LOAD DATA INFILE statement, if any. (Bug#51876)
* Searches in INFORMATION_SCHEMA tables for rows matching a nonexistent database produced an error instead of an empty query result. (Bug#49542)
* On FreeBSD, memory mapping for MERGE tables could fail if underlying tables were empty. (Bug#47139)
* The my_like_range_xxx() functions returned badly formed maximum strings for Asian character sets, which caused problems for storage engines. (Bug#45012)
* A debugging assertion could be raised after a write failure to a closed socket. (Bug#42496)
* An assertion failure occurred within yaSSL for very long keys. (Bug#29784) See also Bug#53463.






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