End of Product Lifecycle. Active development and support for MySQL Database Server versions 3.23, 4.0, and 4.1 has ended. For details, see http://www.mysql.com/about/legal/lifecycle/#calendar. Please consider upgrading to a recent version. Further updates to the content of this manual will be minimal. All formats of this manual will continue to be available until 31 Dec 2010.
The initial release of MySQL 4.1.3 for Windows was accidentally compiled without support for the Spatial Extensions (OpenGIS). This was fixed by rebuilding from the same 4.1 code snapshot with the missing option and releasing those packages as version 4.1.3a.
To enable compiling the newly released PHP 5 against MySQL 4.1.3 on Windows, the Windows packages had to be rebuilt once more to add a few missing symbols to the MySQL client library. These packages were released as MySQL 4.1.3b.
Functionality Added or Changed
Incompatible Change: The
timezone system variable has been removed and replaced by
system_time_zone. See Section 5.1.3, “Server System Variables”.
Incompatible Change: C API change:
mysql_shutdown() now requires a second argument. This is a source-level incompatibility that affects how you compile client programs; it does not affect the ability of compiled clients to communicate with older servers. See Section 220.127.116.11, “mysql_shutdown()”.
Replication: Replication and mysqlbinlog now have better support for the case that the session character set and collation variables are changed within a given session. See Section 14.7, “Replication Features and Issues”.
DROP DATABASE IF EXISTS,
DROP TABLE IF EXISTS, single-table
DELETE and single-table
UPDATE are now written to the binary log even if they changed nothing on the master (for example, even if the
DELETE matched no row). The old behavior sometimes caused bad surprises in replication setups.
Added SQL syntax for prepared statements. See Section 12.6, “SQL Syntax for Prepared Statements”.
sync_binlog=N global variable and startup option, which makes the MySQL server synchronize its binary log to disk (
fdatasync()) after every
Nth write to the binary log.
CHECK TABLE now can be killed. It then marks the table as corrupted. See Section 18.104.22.168, “KILL Syntax”.
OPTIMIZE TABLE for
InnoDB tables is now mapped to
ALTER TABLE instead of
ARCHIVE storage engine.
--innodb-safe-binlog server option, which adds consistency guarantees between the content of
InnoDB tables and the binary log. See Section 5.3.4, “The Binary Log”.
sync_frm is now a settable global variable (not only a startup option).
Support for per-connection time zones was added. Now you can set the current time zone for a connection by setting the
@@time_zone system variable to a value such as
'Europe/Moscow' is the name of one of the time zones described in the system tables). Functions like
UNIX_TIMESTAMP, and so forth honor this time zone. Values of
TIMESTAMP type are also interpreted as values in this time zone. So now our
TIMESTAMP type behaves similar to Oracle's
TIMESTAMP WITH LOCAL TIME ZONE. That is, values stored in such a column are normalized toward UTC and converted back to the current connection time zone when they are retrieved from such a column. To set up the tables that store time zone information, see Section 2.10, “Postinstallation Setup and Testing”.
LIKE now supports the use of a prepared statement parameter or delimited constant expression as the argument to
ESCAPE . (Bug #4200)
Language-specific collations were added for the
utf8 Unicode character sets: Icelandic, Latvian, Romanian, Slovenian, Polish, Estonian, Swedish, Turkish, Czech, Danish, Lithuanian, Slovak, Spanish, Traditional Spanish.
Changed the slave SQL thread to print fewer useless error messages (no more message duplication; no more messages when an error is skipped (because of
Basic time zone conversion function
CONVERT_TZ() was added. It assumes that its first argument is a datetime value in the time zone specified by its second argument and returns the equivalent datetime value in the time zone specified by its third argument.
Replication: Complex expressions using
OR, or both could result in a crash if the query containing the expression query was ignored, either by a replication server due to
--replicate-*-table rules, or by any MySQL server due to a syntax error. (Bug #3969, Bug #4494)
Replication: The slave SQL thread refused to replicate
INSERT ... SELECT if it examined more than 4 billion rows. (Bug #3871)
Re-execution of optimized
MIN() functions is now handled correctly for prepared statements. (Bug #2687)
Different numbers of warnings were generated when an invalid datetime (as a string or as a number) was inserted into a
TIMESTAMP column. (Bug #2336)
During the installation process of the server RPM on Linux, if mysqld was run as the
root system user and with
--log-bin pointing to a directory outside of
/var/lib/mysql, it created binary log files owned by
root in this directory, which remained owned by
root after the installation. Now mysqld is started as the
mysql system user instead. (Bug #4038)
A potential memory overrun could occur in
mysql_real_connect() (which required a compromised DNS server and certain operating systems). (Bug #4017)
CREATE DATABASE IF NOT EXISTS caused an error on Win32 platforms if the database existed. (Bug #4378)
Attempt to prepare a statement containing a character set introducer caused the server to crash. (Bug #4105)
Attempting to execute a nonprepared statement could cause the server to crash. (Bug #4236)
mysqlbinlog didn't escape the string content of user variables, and did not deal well when these variables were in non-ASCII character sets; this is now fixed by always printing the string content of user variables in hexadecimal. The character set and collation of the string is now also printed. (Bug #3875)
UNION returned incorrect results if the display length of columns for numeric types was set to less than the actual length of values in them. (Bug #4067)
Conversion of a client-side string column to a
MYSQL_TIME application buffer was not handled correctly by the prepared statements API. (Bug #4030)
EXPLAIN statements could lead to a server crash. (Bug #4271)
A malicious user could bypass password verification with specially crafted packets, using a modified client library. (CVE-2004-0627, CVE-2004-0628)
NULL was not handled correctly with derived tables. (Bug #4097)
MERGE tables created with
INSERT_METHOD=LAST were not able to report a key number, causing Duplicate entry errors for
UNIQUE keys in
INSERT statements. As a result, the error message was not precise enough (error 1022 instead of error 1062) and
INSERT ... ON DUPLICATE KEY UPDATE did not work. (Bug #4008)
Parameters in some prepared statements were not handled correctly. (Bug #4280)
Prepared statements did not always work correctly on big-endian platforms. (Bug #4173)
CONCAT(?, , when used in prepared statements, returned incorrect results. (Bug #3796)
Tables were unlocked too early in cases of a subquery in a query's
HAVING clause. (Bug #3984)
The range optimizer did not perform correctly when using many
IN() queries on different key parts. (Bug #4157)
COUNT(DISTINCT) degraded in cases like
COUNT(DISTINCT a TEXT, b CHAR(1)) (no index used). (Bug #3904)
In rare circumstances,
DELETE from a table with
FULLTEXT indexes resulted in a corrupted table, if words of different lengths could be considered equal. This is possible with some collations, for example,
latin1_german2_ci. (Bug #3808)
mysql_stmt_close() hung when attempting to close a statement after failed
mysql_stmt_fetch() call. (Bug #4079)
--with-charset with configure did not affect the MySQL client library. (Bug #3990)
root account to Windows version of mysqld. (Bug #4242)
The microseconds part of
MYSQL_TYPE_DATETIME columns was not sent to the client by prepared statements. (Bug #4026)
mysqldump when it did not return any error if the output device was full. (Bug #1851)
DROP DATABASE honor the value of
lower_case_table_names. (Bug #4066)
Under rare circumstances,
MATCH ... AGAINST(... IN BOOLEAN MODE) could yield incorrect results if, in the collation used for the data, one byte could match many (as in
latin1_german2_ci.) (Bug #3964)