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From:Vishal Chaudhary Date:February 1 2014 5:12am
Subject:MySQL Community Server 5.6.16 has been released
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Dear MySQL users,

MySQL Server 5.6.16, a new version of the popular Open Source
Database Management System, has been released. MySQL 5.6.16 is
recommended for use on production systems.

For an overview of what's new in MySQL 5.6, please see

     Starting with 5.6.11, Microsoft Windows packages for MySQL 5.6
     are available both as a "full" installer and as a "web" installer.
     The full installer is significantly larger and comes bundled with
     the latest software releases available. This bundle makes it easy
     to download and configure a full server and development suite.

     The web installer doesn't come bundled with any actual products
     and instead relies on download-on-demand to fetch only the
     products you choose to install. This makes the initial download
     much smaller but increases install time as the individual products
     will need to be downloaded.

For information on installing MySQL 5.6.16 on new servers or upgrading
to MySQL 5.6.16 from previous MySQL releases, please see

MySQL Server is available in source and binary form for a number of
platforms from our download pages at

Not all mirror sites may be up to date at this point in time, so if you
can't find this version on some mirror, please try again later or choose
another download site.

We welcome and appreciate your feedback, bug reports, bug fixes,
patches, etc:

The following section lists the changes in the MySQL source code since
the previous released version of MySQL 5.6. It may also be viewed
online at


Changes in MySQL 5.6.16 (2014-01-31)
Functionality Added or Changed

      * Previously, ALTER TABLE in MySQL 5.6 could alter a table such
        that the result had temporal columns in both 5.5 and 5.6
        format. Now ALTER TABLE upgrades old temporal columns to 5.6
        INDEX, and FORCE operations. This conversion cannot be done
        using the INPLACE algorithm, so specifying ALGORITHM=INPLACE
        in these cases results in an error. (Bug #17246318)

      * CMake now supports a -DTMPDIR=dir_name option to specify the
        default tmpdir value. If unspecified, the value defaults to
        P_tmpdir in <stdio.h>. Thanks to Honza Horak for the patch.
        (Bug #68338, Bug #16316074)

    Bugs Fixed

      * InnoDB; Replication: Using the InnoDB memcached plugin (see
        InnoDB Integration with memcached
        ) with innodb_api_enable_binlog set to 1 caused the server to
        leak memory. (Bug #70757, Bug #17675622)

      * InnoDB: A boolean mode full-text search query would result in
        a memory access violation during parsing. (Bug #17978763)

      * InnoDB: When new indexes are added by an ALTER TABLE
        operation, instead of only saving table-level statistics and
        statistics for the new indexes, InnoDB would save statistics
        for the entire table, including the table's other indexes.
        This behavior slowed ALTER TABLE performance. (Bug #17848838,
        Bug #16511145)

      * InnoDB: Due to a parser error, full-text search queries that
        include a sub-expression could return the wrong result. (Bug

      * InnoDB: The innochecksum tool did not use a Windows-specific
        API to retrieve file size information, which resulted in an
        incorrect error message (Error: ibdata1 cannot be found) when
        the MySQL 5.6 innochecksum 2GB file size limit was exceeded.
        innochecksum now provides support for files larger than 2GB in
        both MySQL 5.6 and MySQL 5.7. (Bug #17810862, Bug #70936)

      * InnoDB: Due to a regression introduced by the fix for
        Bug#17371537, memory was not allocated for the default
        memcached engine when using the default memcached engine as
        the backstore for data instead of InnoDB. (Bug #17800829)

      * InnoDB: InnoDB would report an incorrect operating system
        error code after failing to initialize. (Bug #17788055, Bug

      * InnoDB: Manipulating a table after discarding its tablespace
        using ALTER TABLE ... DISCARD TABLESPACE could result in a
        serious error. (Bug #17700280)

      * InnoDB: MATCH() ... AGAINST queries that use a long string as
        an argument for AGAINST() could result in an error when run on
        an InnoDB table with a full-text search index. (Bug #17640261)

      * InnoDB: An InnoDB full-text search failure would occur due to
        an "unended" token. The string and string length should be
        passed for string comparison. (Bug #17659310)

      * InnoDB: In debug builds, a merge insert buffer during a page
        read would cause a memory access violation. (Bug #17561188)

      * InnoDB: Truncating a memcached InnoDB table while memcached is
        performing DML operations would result in a serious error.
        (Bug #17468031)

      * InnoDB: In sync0rw.ic, rw_lock_x_lock_func_nowait would
        needlessly call os_thread_get_curr_id. (Bug #17509710, Bug

      * InnoDB: Attempting to rename a table to a missing database
        would result in a serious error. (Bug #17447500)

      * InnoDB: If a tablespace data file path is updated in a .isl
        file and then a crash recovery is performed, the updated
        tablespace data file path is read from the .isl file but the
        SYS_DATAFILES table would not be not updated. The
        SYS_DATAFILES table is now updated with the new data file path
        after crash recovery. (Bug #17448389)

      * InnoDB: If the first page (page 0) of file-per-table
        tablespace data file was corrupt, recovery would be halted
        even though the doublewrite buffer contained a clean copy of
        the page. (Bug #17335427, Bug #70087)

      * InnoDB: The InnoDB memcached Readme file
        (README-innodb_memcached) incorrectly stated that libevent
        1.6.0 is linked statically into daemon memcached. The bundled
        version of libevent is 1.4.12, not 1.6.0. (Bug #17324419, Bug

      * InnoDB: Attempting to reset a replication slave while
        innodb_force_recovery is greater than 0 would return a cryptic
        error message: ERROR(1030) HY000: Got error -1 from storage
        engine. The error message has been changed to: ERROR HY000:
        Operation not allowed when innodb_force_recovery > 0.
        Replication options such as --relay-log-info-repository=TABLE
        and --master-info-repository=TABLE store information in tables
        in InnoDB. When innodb_force_recovery is greater than 0,
        replication tables cannot be updated which may cause
        replication administration commands to fail. (Bug #17287443,
        Bug #69907)

      * InnoDB: The ALTER TABLE INPLACE algorithm would fail to
        decrease the auto-increment value. (Bug #17250787, Bug #69882)

      * InnoDB: Comments in incorrectly stated that
        btr_cur_pessimistic_update() and btr_cur_optimistic_update()
        would accept a NULL value. (Bug #17231743, Bug #69847)

      * InnoDB: dict_table_schema_check would call dtype_sql_name
        needlessly. (Bug #17193801, Bug #69802)

      * InnoDB: The function os_file_get_status would not work with
        raw devices. (Bug #17023438, Bug #69424)

      * InnoDB: During crash recovery, an incorrect transaction active
        time would result in rolling back an uncommitted transaction.
        (Bug #16936961, Bug #69438)

      * InnoDB: Heap block debugging information (file_name, lineno),
        used for logging diagnostics, would appear in release builds.
        This information should only appear in debug builds. (Bug
        #16924719, Bug #69422)

      * InnoDB: Renaming a column while also adding or dropping
        columns in the same ALTER TABLE operation would cause an
        error. (Bug #16864981)

      * InnoDB: An online ALTER TABLE operation would consume more
        memory than expected. During an online ALTER TABLE operation,
        an online log buffer containing a head and tail buffer is
        created for each index that is created or rebuilt. The tail
        buffer is the writer context and is only required for
        concurrent write operations on an index while the ALTER TABLE
        operation is in progress. The head buffer is the reader
        context and is only required during the log apply phase. To
        reduce memory consumption, the tail buffer is now allocated
        when the first DML statement is run on the index, and the head
        buffer is only allocated in the log apply phase and freed
        afterwards. (Bug #16868967, Bug #69325, Bug #17911720)

      * InnoDB: On Windows, the full-text search (FTS) object ID was
        not in the expected hexadecimal format. (Bug #16559254)
        References: See also Bug #16559119.

      * InnoDB: Fetching and releasing pages from the buffer pool and
        tracking the page state are expensive and complex operations.
        Prior to the bug fix, these operations were performed using a
        page mutex. Using a page mutex to track several things is
        expensive and does not scale well. The bug fix separates fetch
        and release tracking (in-use state) of a page from page I/O
        state tracking. Fetch and release is now tracked using atomics
        where available.
        For portability, a new CMake build option,
        INNODB_PAGE_ATOMIC_REF_COUNT (default ON), can be used to
        disable atomic page reference counting on platforms where
        atomics support is not available. When atomic page reference
        counting is enabled (default), "[Note] InnoDB: Using atomics
        to ref count buffer pool pages" is printed to the error log at
        server startup. If atomic page reference counting is disabled,
        "[Note] InnoDB: Using mutexes to ref count buffer pool pages"
        is printed instead. (Bug #16249481, Bug #68079)

      * InnoDB: Table renaming errors would appear in the LATEST
        output. (Bug #12762390, Bug #61746)

      * InnoDB: UNIV_SYNC_DEBUG, which was disabled in univ.i with the
        fix for Bug#16720368, is now enabled. (Bug #69617, Bug

      * Partitioning: Queries using the index_merge optimization (see
        Index Merge Optimization
        on.html)) could return invalid results when run against tables
        that were partitioned by HASH. (Bug #17588348, Bug #70588)

      * Partitioning: When no partition had returned a row since the
        last HA_ERR_KEY_NOT_FOUND error, the use of uninitialized
        memory in the priority queue used for returning rows in sorted
        order could lead to a crash of the server. (Bug #17401628)

      * Replication: Creating and dropping large numbers of temporary
        tables could lead to increased memory consumption. (Bug

      * Replication: mysqlbinlog --verbose failed when it encountered
        a corrupt row event in the binary log. Such a row event could
        also cause the slave to fail. (Bug #17632978)
        References: See also Bug #16960133.

      * Replication: When log_warnings is greater than 1, the master
        prints binary log dump thread information---containing the
        slave server ID, binary log file name, and binary log
        position---in mysqld.1.err. A slave server ID greater than 2
        billion was printed with a negative value in such cases. (Bug
        #17641586, Bug #70685)

      * Replication: mysqlbinlog did not properly decode DECIMAL
        values in a row-based binary log. This could cause invalid
        values to be printed out for DECIMAL columns. (Bug #17544169)
        References: See also Bug #14309019.

      * Replication: Seconds_Behind_Master in the output of SHOW SLAVE
        STATUS could under some conditions be reported as 0 when it
        should have had a value greater than zero. (Bug #17233214)
        References: See also Bug #16579028.

      * Replication: The semisynchronous replication plugin was called
        twice for a DDL statement, incrementing
        Rpl_semi_sync_master_yes_tx by 2 instead of 1 each time such a
        statement was executed. (Bug #70410, Bug #17509011)

      * Compilation errors occurred on Solaris 10; resolved by
        including my_config.h before system header files. (Bug

      * FORCE INDEX [FOR ORDER BY] (index_name) did not work for
        The fix for this bug also also changes the warning created for
        EXPLAIN. Instead of printing only {IGNORE|USE|FORCE} INDEX it
        now also prints FOR {GROUP BY|ORDER BY|JOIN} if that was
        specified in the query. (Bug #17889511)

      * With the compressed client/server protocol enabled,
        Performance Schema statement instrumentation could raise an
        assertion. (Bug #17794846)

      * In some cases, UNIX_TIMESTAMP() could return NULL when it
        should return 0. (Bug #17728371)

      * An assertion could be raised if a filesort failed to resize
        its main buffer when record properties changed. (Bug

      * The cache used for the Index Merge access method was freed
        only after successful retrieval of all rows. Interruption or
        failure of the operation led to a file descriptor leak. (Bug

      * Using the mysqldump --set-gtid-purged option with no value
        caused mysqldump to crash. (Bug #17650245)

      * A race condition between Performance Schema statement event
        threads led to a server exit. (Bug #17637970)

      * In a view definition requiring resolution of aggregate
        expressions within a subquery to an outer query, selecting
        from the view could cause a server exit. (Bug #17547804)
        References: This bug is a regression of Bug #16436383.

      * An addressing error in accessing the join buffer could produce
        invalid results or a server exit. (Bug #17513341)

      * mysql_config incorrectly included some flags to generate
        compiler warning output. (Bug #17400967)

      * With semi-join optimization enabled, queries with nested
        subqueries could cause a server exit due to incorrect
        resolution of references to columns in the middle query block.
        (Bug #17398972)

      * In some cases, the optimizer wrote fixed-length temporary
        MyISAM tables to disk rather than variable-length temporary
        tables. (Bug #17231940)

      * Enabling the validate_password plugin could result in
        incorrect password hashes being stored in the mysql.user
        table. (Bug #17065383)

      * For accounts authenticated using the sha256_password plugin,
        setting the password after the password had been expired did
        not clear the password-expired flag. (Bug #16872181)

      * On Mac OS X 10.7, a race condition involving vio_shutdown()
        and the select-based implementation of vio_io_wait() could
        cause a server exit. (Bug #16354789, Bug #17733393)

      * Host names in example URLs used within the source code were
        replaced by names in the domain, the domain
        intended by IANA for this purpose. (Bug #15890092)

      * For utf8 and utf8mb4 strings, handler functions unnecessarily
        called a Unicode conversion function. (Bug #14057034)

      * Several -W warning flags were turned off for compilation in
        maintainer mode if MySQL was configured with
        -DWITH_INNODB_MEMCACHED=1. (Bug #13898319)

      * Calling the ExtractValue() function with an invalid XPath
        expression could in some cases lead to a failure of the
        server. (Bug #12428404, Bug #61065)

      * Use of a non-multibyte algorithm for skipping leading spaces
        in multi-byte strings could cause a server exit. (Bug

      * With ONLY_FULL_GROUP_BY SQL mode enabled, a query that uses
        GROUP BY on a column derived from a subquery in the FROM
        clause failed with a column isn't in GROUP BY error, if the
        query was in a view. (Bug #11923239)

      * For the utf8_bin collation, ORDER BY LOWER(col_name) could
        produce incorrect ordering. (Bug #69005, Bug #16691598)

      * Several issues identified by the Coverity static analysis tool
        were fixed. Thanks to Honza Horak for the patch. (Bug #70830,
        Bug #17760511)

      * On Windows, the --local-service server option did not work,
        and was not displayed in the --help message. (Bug #69637, Bug

      * It was not possible to query a view with an ORDER BY clause
        that referenced an alias in the SELECT clause of the view
        definition, unless all columns in the view were named in the
        select list.
        To handle this problem, the server now writes a view
        differently into the .frm file that stores the view
        definition. If you experience view-evaluation errors such as
        just described, drop and recreate the view so that the .frm
        file contains the updated view representation. (Bug #69678,
        Bug #17077305)

      * The prototype of the Performance Schema instrumentation API
        mysql_cond_timedwait() call was fixed to be drop-in compatible
        with pthread_cond_timedwait(). This fix affects only
        implementers of third-party plugins. (Bug #70628, Bug

      * The make_atomic_cas_body64 implementation on IA32 with gcc but
        without gcc builtins could be miscompiled due to an incorrect
        constraint. The patch also causes MySQL to use builtin atomics
        when compiled using Clang. (Bug #63451, Bug #17242996)

      * Complex updates of Performance Schema tables involving joins
        or subqueries failed to update every row. (Bug #70025, Bug

      * For the path specified with the --basedir option, mysql_plugin
        attempted to unlink the path rather than free the memory in
        which the path was stored. (Bug #69752, Bug #17168602)

      * COUNT(DISTINCT) sometimes produced an incorrect result when
        the last read row contained a NULL value. (Bug #68749, Bug
        #16539979, Bug #71028, Bug #17867117)

      * referred to partitioning code that should have
        been protected by an #ifdef, even when MySQL was configured
        with -DWITH_PARTITION_STORAGE_ENGINE=OFF. (Bug #71010, Bug

      * An incorrect result could be returned for a query with an IF()
        predicate in the WHERE clause combined with OUTER JOIN in a
        subquery that is transformed to a semi-join. (A workaround is
        to disable semi-join using SET
        optimizer_switch='semijoin=off';) (Bug #70608, Bug #17600176)

      * A full-text search combined with derived tables (subqueries in
        the FROM clause) caused a server exit.
        Now if a full-text operation depends on a derived table, the
        server produces an error indicating that a full-text search
        cannot be done on a materialized table. (Bug #68751, Bug

      * Some scripts displayed out-of-date information regarding where
        to report bugs. (Bug #68742, Bug #16530527)

      * Some files in the Performance Schema file_instances table were
        not being removed because the file-removal operation was not
        instrumented. (Bug #69782, Bug #17209750)

      * mysqldump --single-transaction acquired metadata locks for
        each dumped table but did not release them until the dump
        operation finished. Consequently, other DDL operations on a
        dumped table blocked even after the table itself had been
        dumped. mysqldump now attempts to release metadata locks
        earlier. (Bug #71017, Bug #17862905)

      * Updating a FEDERATED table with UPDATE... JOIN caused a server
        exit when the local table contained a single row and that row
        could be joined to a row in the FEDERATED table. (Bug #68354,
        Bug #16324629)

      * mysql_install_db referred to the obsolete mysqlbug script for
        reporting problems. It now refers to
        instead. (Bug #29716, Bug #11746921)

On Behalf of the MySQL/ORACLE RE Team,

Vishal Chaudhary

MySQL Community Server 5.6.16 has been releasedVishal Chaudhary2 Feb