オリジナル版：http://dev.mysql.com/doc/refman/5.0/en/news-5-0-26.html
最も普及しているオープンソースデータベース管理システムであるMySQL 5.0.26がリリースされました。コミュニティエディションは、http://dev.mysql.com/downloads/とミラーサイトのダウンロード・ページから、ソースコード及び多くのプラットフォームのためのバイナリで現在利用可能です。
すべてのミラーサイトが現在、最新であるとは限らないことに注意してください。
あるミラーサイトでこのバージョンを見つけることができない場合は、再度確認を行うか、あるいは別のダウンロード・サイトを選択してください。
これは最近の製品バージョンのバグ修正版です。
このセクションでは、その前の公式のリリース以来適用している、変更とバグ修正のみを記録しています。使用するバージョンと特徴に関連した修正に関するより良質な個別の変更情報を受け取りたい場合は、MySQLネットワークにご登録下さい（商用のMySQL提供です。）より詳細については、http://www.mysql.com/network/advisors.htmlをご参照ください。
このバージョンでの個々のバグ修正に関するより詳細については、http://bugs.mysql.com/ で、バグデータベースを参照して下さい。
あなたのご意見をお待ちしています。
以下は、リリース5.0.26で変更された機能です。
Functionality added or changed:
* The source distribution has been updated so that the UDF
example can be compiled under Windows with CMake. See Section
24.2.4.5, "Compiling and Installing User-Defined Functions."
(Bug#19121:http://bugs.mysql.com/19121)
* The LOAD DATA FROM MASTER and LOAD TABLE FROM MASTER
statements are deprecated. See Section 13.6.2.2, "LOAD DATA
FROM MASTER Syntax," for recommended alternatives.
(Bug#18822:http://bugs.mysql.com/18822)
* mysqldump now has a --flush-privileges option. It causes
mysqldump to emit a FLUSH PRIVILEGES statement after dumping
the mysql database. This option should be used any time the
dump contains the mysql database and any other database that
depends on the data in the mysql database for proper
restoration. (Bug#21424:http://bugs.mysql.com/21424)
* The number of InnoDB threads is no longer limited to 1,000 on
Windows. (Bug#22268:http://bugs.mysql.com/22268)
Bugs fixed:
* Deleting entries from a large MyISAM index could cause index
corruption when it needed to shrink. Deletes from an index can
happen when a record is deleted, when a key changes and must be
moved and when a key must be un-inserted because of a duplicate key.
This can also happen in REPAIR TABLE when a duplicate key is found
and in myisamchk when sorting the records by an index.
(Bug#22384:http://bugs.mysql.com/22384)
* Conversion of values inserted into a BIT column could affect
adjacent columns. (Bug#22271:http://bugs.mysql.com/22271)
* The URL into the online manual that is printed in the stack
trace message by the server was out of date.
(Bug#21449:http://bugs.mysql.com/21449)
* PROCEDURE ANALYSE() returned incorrect values of M FLOAT(M, D)
and DOUBLE(M, D). (Bug#20305:http://bugs.mysql.com/20305)
* Join conditions using partial indexes on utf8 columns of
InnoDB tables incorrectly ignored rows where the length of the
actual value was greater than the length of the partial index.
(Bug#19960:http://bugs.mysql.com/19960)
* On an INSERT into an updatable but non-insertable view, an
error message was issued stating that the view was not
updatable. Now the message says the view is not
insertable-into. (Bug#5505:http://bugs.mysql.com/5505)
* INSERT DELAYED did not honor SET INSERT_ID or the
auto_increment_* system variables.
(Bug#20627:http://bugs.mysql.com/20627, Bug# 20830)
* For character sets having a mbmaxlen value of 2, any ALTER
TABLE statement changed TEXT columns to MEDIUMTEXT.
(Bug#21620:http://bugs.mysql.com/21620)
* A query that used GROUP BY and an ALL or ANY quantified
subquery in a HAVING clause could trigger an assertion
failure. (Bug#21853:http://bugs.mysql.com/21853)
* For an ENUM column that used the ucs2 character set, using
ALTER TABLE to modify the column definition caused the default
value to be lost. (Bug#20108:http://bugs.mysql.com/20108)
* mysql_com.h unnecessarily referred to the ulong type.
(Bug#22227:http://bugs.mysql.com/22227)
* Incorporated some portability fixes into the definition of
__attribute__ in my_global.h.
(Bug#2717:http://bugs.mysql.com/2717)
* Linking the pthreads library to single-threaded MySQL
libraries caused dlopen() to fail at runtime on HP-UX.
(Bug#18267:http://bugs.mysql.com/18267)
* In the package of pre-built time zone tables that is available
for download athttp://dev.mysql.com/downloads/timezones.html,
the tables now explicitly use the utf8 character set so that
they work the same way regardless of the system character set
value. (Bug#21208:http://bugs.mysql.com/21208)
* The build process incorrectly tried to overwrite
sql/lex_hash.h. This caused the build to fail when using a
shadow link tree pointing to original sources that were owned
by another account. (Bug#18888:http://bugs.mysql.com/18888)
* mysql_ftdump produced bad counts for common words.
(Bug#22326:http://bugs.mysql.com/22326)
* yaSSL had a conflicting definition for socklen_t on hurd-i386
systems. (Bug#22326:http://bugs.mysql.com/22326)
* When records are merged from the insert buffer and the page
needs to be reorganized, InnoDB used incorrect column length
information when interpreting the records of the page. This
caused a server crash due to apparent corruption of secondary
indexes in ROW_FORMAT=COMPACT that contain prefix indexes of
fixed-length columns. Data files should not be corrupted, but
the crash was likely to repeat every time the server was
restarted. (Bug#21638:http://bugs.mysql.com/21638)
* Using GROUP_CONCAT() on the result of a subquery in the FROM
clause that itself used GROUP_CONCAT() could cause a server
crash. (Bug#22015:http://bugs.mysql.com/22015)
* Execution of a prepared statement that uses an IN subquery
with aggregate functions in the HAVING clause could cause a
server crash. (Bug#21617:http://bugs.mysql.com/21617)
* The value of LAST_INSERT_ID() was not always updated correctly
within stored routines.
(Bug#21726:http://bugs.mysql.com/21726)
* The ARCHIVE engine incorrectly calculated the maximum file
size on big-endian machines, resulting in a server crash when
the file reached 2GB. (Bug#21675:http://bugs.mysql.com/21675)
* Selecting from a MERGE table could result in a server crash if
the underlying tables had fewer indexes than the MERGE table
itself. (Bug#21617:http://bugs.mysql.com/21617)
* A locking safety check in InnoDB reported a spurious error
stored_select_lock_type is 0 inside ::start_stmt() for INSERT
... SELECT statements in innodb_locks_unsafe_for_binlog mode.
The safety check was removed.
(Bug#10746:http://bugs.mysql.com/10746)
* make install tried to build files that should already have
been built by make all, causing a failure if installation was
performed using a different account than the one used for the
initial build. (Bug#19738:http://bugs.mysql.com/19738)
* The source distribution would not build on Windows due to a
spurious dependency on ib_config.h.
(Bug#22224:http://bugs.mysql.com/22224)
* The server returns a more informative error message when it
attempts to open a MERGE table that has been defined to use
non-MyISAM tables. (Bug#10974:http://bugs.mysql.com/10974)
* Within stored routines, some error messages were printed
incorrectly. A non-null-terminated string was passed to a
message-printing routine that expected a null-terminated
string. (Bug#20778:http://bugs.mysql.com/20778)
* SUBSTR() results sometimes were stored improperly into a
temporary table when multi-byte character sets were used.
(Bug#20204:http://bugs.mysql.com/20204)
* On Windows, inserting into a MERGE table after renaming an
underlying MyISAM table caused a server crash.
(Bug#20789:http://bugs.mysql.com/20789)
* Certain malformed INSERT statements could crash the mysql
client. (Bug#21142:http://bugs.mysql.com/21142)
* On Mac OS X, zero-byte read() or write() calls to an
SMB-mounted filesystem could return a non-standard return
value, leading to data corruption. Now such calls are avoided.
(Bug#12620:http://bugs.mysql.com/12620)
* With TRADITIONAL SQL mode, assignment of out-of-bound values
and rounding of assigned values was done correctly, but
assignment of the same numbers represented as strings
sometimes was handled differently.
(Bug#6147:http://bugs.mysql.com/6147)
* The source distribution failed to compile when configured with
the --without-geometry option.
(Bug#12991:http://bugs.mysql.com/12991)
* The source distribution failed to compile when configured with
the --with-libwrap option.
(Bug#18246:http://bugs.mysql.com/18246)
* For INSERT ... ON DUPLICATE KEY UPDATE, use of
VALUES(col_name) within the UPDATE clause sometimes was
handled incorrectly. (Bug#21555:http://bugs.mysql.com/21555)
* Row equalities (such as WHERE (a,b) = (c,d) were not taken
into account by the optimizer, resulting in slow query
execution. Now they are treated as conjunctions of equalities
between row elements. (Bug#16081:http://bugs.mysql.com/16081)
* Column names supplied for a view created on a master server
could be lost on a slave server.
(Bug#19419:http://bugs.mysql.com/19419)
* For a MyISAM table locked with LOCK TABLES ...WRITE, queries
optimized using the index_merge method did not show rows
inserted with the lock in place.
(Bug#20256:http://bugs.mysql.com/20256)
* Table aliases in multiple-table DELETE statements sometimes
were not resolved. (Bug#21392:http://bugs.mysql.com/21392)
* A function result in a comparison was replaced with a constant
by the optimizer under some circumstances when this
optimization was invalid.
(Bug#21698:http://bugs.mysql.com/21698)
* A subquery that uses an index for both the WHERE and ORDER BY
clauses produced an empty result.
(Bug#21180:http://bugs.mysql.com/21180)
* If the auto_increment_offset setting causes MySQL to generate
a value larger than the column's maximum possible value, the
INSERT statement is accepted in strict SQL mode, whereas but
should fail with an error.
(Bug#20573:http://bugs.mysql.com/20573)
* Queries containing a subquery that used aggregate functions
could return incorrect results.
(Bug#16792:http://bugs.mysql.com/16792)
* EXPLAIN sometimes returned an incorrect select_type for a
SELECT from a view, compared to the select_type for the
equivalent SELECT from the base table.
(Bug#5500:http://bugs.mysql.com/5500)
* Use of myisampack or myisamchk on a table with FULLTEXT
indexing resulted in table corruption.
(Bug#19702:http://bugs.mysql.com/19702)
* BIN(), OCT(), and CONV() did not work with BIT values.
(Bug#15583:http://bugs.mysql.com/15583)
* The server could crash for the second execution of a function
containing a SELECT statement that uses an aggregating IN
subquery. (Bug#21493:http://bugs.mysql.com/21493)
* UPGRADE was treated as a reserved word, although it is not.
(Bug#21772:http://bugs.mysql.com/21772)
* mysql_upgrade produced a malformed upgrade_defaults file by
overwriting the [client] group header with a password option.
This prevented mysqlcheck from running successfully when
invoked by mysql_upgrade.
(Bug#21011:http://bugs.mysql.com/21011)
* Usernames have a maximum length of 16 characters (even if they
contain multi-byte characters), but were being truncated to 16
bytes. (Bug#20393:http://bugs.mysql.com/20393)
* mysql displayed an empty string for NULL values.
(Bug#21618:http://bugs.mysql.com/21618)