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From:Joerg Bruehe Date:May 4 2006 5:21pm
Subject:MySQL 4.1.19 has been released
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MySQL 4.1.19, a new version of the popular Open Source Database
Management System, has been released. The Community Edition is now
available in source and binary form for a number of platforms from our
download pages at and mirror sites.

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

This is a bugfix release for the recent production release family.

This MySQL 4.1.19 release includes the patches for recently reported
security vulnerabilites in the MySQL client-server protocol. We would
like to thank Stefano Di Paola <stefano.dipaola@stripped> for finding
and reporting these to us.

This section documents all changes and bug fixes that have been
applied since the last official MySQL release. If you would like
to receive more fine-grained and personalised update alerts about
fixes that are relevant to the version and features you use,
please consider subscribing to MySQL Network (a commercial MySQL
offering). For more details please see

We welcome and appreciate your feedback!

Functionality added or changed:
   * Security enhancement: Added the global max_prepared_stmt_count
     system variable to limit the total number of prepared
     statements in the server. This limits the potential for
     denial-of-service attacks based on running the server out of
     memory by preparing huge numbers of statements. The current
     number of prepared statements is available through the
     prepared_stmt_count system variable.
   * InnoDB now caches a list of unflushed files instead of
     scanning for unflushed files during a table flush operation.
     This improves performance when --innodb-file-per-table is set
     on a system with a large number of InnoDB tables.
   * New charset command added to mysql command-line client. By
     typing charset name or \C name (such as \C UTF8), the client
     character set can be changed without reconnecting.
   * Large file support was re-enabled for the MySQL server binary
     for the AIX 5.2 platform.
   * When using the GROUP_CONCAT() function where the
     group_concat_max_len system variable was greater than 512, the
     type of the result was BLOB only if the query included an
     ORDER BY clause; otherwise the result was a VARCHAR.
     The result type of the GROUP_CONCAT() function is now VARCHAR
     only if the value of the group_concat_max_len system variable
     is less than or equal to 512. Otherwise, this function returns
     a BLOB. (Bug#14169:

Bugs fixed:
   * Security fix: A malicious client, using specially crafted
     invalid login or COM_TABLE_DUMP packets was able to read
     uninitialized memory, which potentially, though unlikely in
     MySQL, could have led to an information disclosure. Thanks to
     Stefano Di Paola <stefano.dipaola@stripped> for finding and
     reporting this bug.
   * NDB Cluster: A simultaneous DROP TABLE and table update
     operation utilising a table scan could trigger a node failure.
   * NDB Cluster: Backups could fail for large clusters with many
     tables, where the number of tables approached MaxNoOfTables.
   * The IN-to-EXISTS transformation was making a reference to a
     parse tree fragment that was left out of the parse tree. This
     caused problems with prepared statements.
   * Attempting to set the default value of an ENUM or SET column
     to NULL caused a server crash.
   * Index corruption could occur in cases when
     key_cache_block_size was not a multiple of myisam_block_size
     (for example, with key_cache_block_size=1536 and
   * UNCOMPRESS(NULL) could cause subsequent UNCOMPRESS() calls to
     return NULL for legal non-NULL arguments.
   * Conversion of a number to a CHAR UNICODE string returned an
     invalid result. (Bug#18691:
   * A call to MIN() with a CASE expression as its argument could
     return a non-minimum value.
   * A LOCK TABLES statement that failed could cause MyISAM not to
     update table statistics properly, causing a subsequent CHECK
     TABLE to report table corruption.
   * Avoid trying to include <asm/atomic.h> when it doesn't work in
     C++ code. (Bug#13621:
   * Executing SELECT on a large table that had been compressed
     within myisampack could cause a crash.
   * NDB Cluster: In a 2-node cluster with a node failure,
     restarting the node with a low value for StartPartialTimeout
     could cause the cluster to come up partitioned ("split-brain"
     issue). (Bug#16447:
     A similar issue could occur when the cluster was first started
     with a sufficiently low value for this parameter.
   * NDB Cluster: On systems with multiple network interfaces, data
     nodes would get "stuck" in startup phase 2 if the interface
     connecting them to the management server was working on node
     startup while the interface interconnecting the data nodes
     experienced a temporary outage.
   * mysql_config returned incorrect libraries on x86_64 systems.
   * mysql_reconnect() sent a SET NAMES statement to the server,
     even for pre-4.1 servers that do not understand the statement.
   * During conversion from one character set to ucs2, multi-byte
     characters with no ucs2 equivalent were converted to multiple
     characters, rather than to 0x003F QUESTION MARK.
   * The mysql_close() C API function leaked handles for
     share-memory connections on Windows.
   * The euro sign (€) was not stored correctly in columns using
     the latin1_german1_ci or latin1_general_ci collation.
   * The server was always built as though
     --with-extra-charsets=complex had been specified.
   * SELECT ... WHERE column LIKE 'A%' when column had a key and
     used the latin2_czech_cs collation.
   * A query using WHERE (column_1, column_2) IN ((value_1,
     value_2)[, (..., ...), ...]) would return incorrect results.
   * The -lmtmalloc library was removed from the output of
     mysql_config on Solaris, as it caused problems when building
     DBD::mysql (and possibly other applications) on that platform
     that tried to use dlopen() to access the client library.
   * When running a query that contained a GROUP_CONCAT( SELECT
     GROUP_CONCAT(...) ), the result was NULL except in the ROLLUP
     part of the result, if there was one.
   * CASTdouble AS SIGNED INT) for large double values outside the
     signed integer range truncates the result to be within range,
     but the result sometimes had the wrong sign.
   * SET value definitions containing commas were not rejected. Now
     a definition such as SET('a,b','c,d') results in an error.
   * MyISAM: Keys for which the first part of the key was a CHAR or
     VARCHAR column using the UTF-8 character set and longer than
     254 bytes could become corrupted.
   * NDB Cluster: A timeout in the handling of an ABORT condition
     with more that 32 operations could yield a node failure.
   * NDB Cluster: A node restart immediately following a CREATE
     TABLE would fail. Important: This fix supports 2-node Clusters
     only. (Bug#18385:
   * NDB Cluster: In event of a node failure during a rollback, a
     "false" lock could be established on the backup for that node,
     which lock could not be removed without restarting the node.
   * NDB Cluster: The cluster created a crashed replica of a table
     having an ordered index --- or when logging was not enabled,
     of a table having a table or unique index --- leading to a
     crash of the cluster following 8 successibe restarts.
   * NDB Cluster: When replacing a failed master node, the
     replacement node could cause the cluster to crash from a
     buffer overflow if it had an excessively large amount of data
     to write to the cluster log.
   * NDB Cluster: Restarting nodes were allowed to start and join
     the cluster too early.
   * If InnoDB encountered a HA_ERR_LOCK_TABLE_FULL error and
     rolled back a transaction, the transaction was still written
     to the binary log. (Bug#18283:
   * Connecting to a server with a UCS2 default character set with
     a client using a non-UCS2 character set crashed the server.
   * Character set conversion of string constants for UNION of
     constant and table column was not done when it was safe to do
     so. (Bug#15949:
   * Use of TRUNCATE TABLE for a TEMPORARY table on a master server
     was propagated to slaves properly, but slaves did not
     decrement the Slave_open_temp_tables counter properly.
   * SELECT COUNT(*) for a MyISAM table could return different
     results depending on whether an index was used.
   * Large file support did not work in AIX server binaries.
   * Security Improvement: GRANTs to users with wildcards in their
     host information could be erroneously applied to similar users
     with the same username and similar wildcards. For example, a
     privilege granted to foo@% are also applied to user foo@192.%.
   * NDB Cluster: Inserting and deleting BLOB column values while a
     backup was in process could cause the loss of an ndbd node.
   * Setting the myisam_repair_threads system variable to a value
     larger than 1 could cause corruption of large MyISAM tables.
   * Security improvement: In grant table comparisons, improper use
     of a latin1 collation caused some hostname matches to be true
     that should have been false. Thanks to Deomid Ryabkov for
     finding this bug and proposing a solution.
   * NDB Cluster: ndb_delete_all would run out of memory on tables
     containing BLOB columns.
   * A statement containing GROUP BY and HAVING clauses could
     return incorrect results when the HAVING clause contained
     logic that returned FALSE for every row.
   * mysqldump tried to dump data from a view. (In MySQL 4.1, this
     applies when connecting to a server from MySQL 5.0 or higher.)
   * NDB Cluster: An UPDATE with an inner join failed to match any
     records if both tables in the join did not have a primary key.
   * NDB Cluster: A DELETE with a join in the WHERE clause failed
     to retrieve any records if both tables in the join did not
     have a primary key. (Bug#17249:
   * NDB Cluster: In some cases, LOAD DATA INFILE did not load all
     data into NDB tables. (Bug#17081:
   * NDB Cluster: The REDO log would become corrupted (and thus
     unreadable) in some circumstances, due to a failure in the
     query handler. (Bug#17295:
   * NDB Cluster: No error message was generated for setting
     NoOfFragmentLogFiles too low.
   * NDB Cluster: No error message was generated for setting
     MaxNoOfAttributes too low.
   * Binary distributions for Solaris contained files with group
     ownership set to the non-existing wheel group. Now the bin
     group is used. (Bug#15562:
   * Killing a long-running query containing a subquery could cause
     a server crash. (Bug#14851:
   * Repeated invocation of my_init() and my_end() caused
     corruption of character set data and connection failure.
   * A FULLTEXT query in a prepared statement could result in
     unexpected behavior. (Bug#14496:
   * A FULLTEXT query in a UNION could result in unexpected
     behavior. (Bug#16893:
   * Server crash when dropping InnoDB constraints named
     TABLENAME_ibfk_0. (Bug#16387:
   * Corrected race condition when dropping the adaptive hash index
     for a B-tree page in InnoDB.
   * LOAD DATA FROM MASTER produced invalid warnings and Packet out
     of order errors when the database already existed on the
     slave. (Bug#15302:
   * A key on a MEMORY table would sometimes fail to match a row.
   * MYSQL_STMT objects were not preserved following a connection
     reset. Attempting to operate on them afterwards caused the
     server to crash. (Bug#12744:


Joerg Bruehe, Senior Production Engineer
Office:  (+49 30) 417 01 487     VoIP: 4464@stripped

MySQL 4.1.19 has been releasedJoerg Bruehe4 May