MySQL 5.0.75 がリリースされました。　これは MySQL 5.0 シリーズのコミュニティ版（MySQL Community Server）の最新リリースです。

今回のリリースは、ソースコードのみとなっています。　5.0シリーズのバイナリでの配布は今まで通り、 5.0.67 が最新となります。
（バージョン5.1シリーズでは、5.1.30が最新）

ダウンロードはこちらから。
http://dev.mysql.com/downloads/mysql/5.0.html


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以下チェンジログ

■機能の追加と変更(5.0.75)
- Security Enhancement: To enable stricter control over the
location from which user-defined functions can be loaded, the
plugin_dir system variable has been backported from MySQL 5.1.
If the value is non-empty, user-defined function object files
can be loaded only from the directory named by this variable.
If the value is empty, the behavior that is used prior to the
inclusion of plugin_dir applies: The UDF object files must be
located in a directory that is searched by your system's
dynamic linker. (Bug#37428: http://bugs.mysql.com/37428)

- Previously, index hints did not work for FULLTEXT searches.
Now they work as follows:
For natural language mode searches, index hints are silently
ignored. For example, IGNORE INDEX(i) is ignored with no
warning and the index is still used.
For boolean mode searches, index hints are honored.
(Bug#38842: http://bugs.mysql.com/38842)

■バグ修正(5.0.75):
- Important Change: Security Fix: Additional corrections were
made for the symlink-related privilege problem originally
addressed in MySQL 5.0.60. The original fix did not correctly
handle the data directory pathname 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: http://bugs.mysql.com/32167, CVE-2008-2079
(http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2079))
See also Bug#39277: http://bugs.mysql.com/39277.

- Security Enhancement: The server consumed excess memory while
parsing statements with hundreds or thousands of nested
boolean conditions (such as OR (OR ... (OR ... ))). This could
lead to a server crash or incorrect statement execution, or
cause other client statements to fail due to lack of memory.
The latter result constitutes a denial of service.
(Bug#38296: http://bugs.mysql.com/38296)

- Incompatible Change: There were some problems using DllMain()
hook functions on Windows that automatically do global and
per-thread initialization for libmysqld.dll:

+ Per-thread initialization: MySQL internally counts the
number of active threads, which causes a delay in
my_end() if not all threads have exited. But there are
threads that can be started either by Windows internally
(often in TCP/IP scenarios) or by users. Those threads do
not necessarily use libmysql.dll functionality but still
contribute to the open-thread count. (One symptom is a
five-second delay in times for PHP scripts to finish.)

+ Process-initialization: my_init() calls WSAStartup that
itself loads DLLs and can lead to a deadlock in the
Windows loader.
To correct these problems, DLL initialization code now is not
invoked from libmysql.dll by default. To obtain the previous
behavior (DLL initialization code will be called), set the
LIBMYSQL_DLLINIT environment variable to any value. This
variable exists only to prevent breakage of existing
Windows-only applications that do not call mysql_thread_init()
and work okay today. Use of LIBMYSQL_DLLINIT is discouraged
and is removed in MySQL 6.0.
(Bug#37226: http://bugs.mysql.com/37226,
Bug#33031: http://bugs.mysql.com/33031)

- Incompatible Change: SHOW STATUS took a lot of CPU time for
calculating the value of the Innodb_buffer_pool_pages_latched
status variable. Now this variable is calculated and included
in the output of SHOW STATUS only when the UNIV_DEBUG symbol
is defined at server build time.
(Bug#36600: http://bugs.mysql.com/36600)

- Incompatible Change: In connection with view creation, the
server created arc directories inside database directories and
maintained useless copies of .frm files there. Creation and
renaming procedures of those copies as well as creation of arc
directories has been discontinued.
This change does cause a problem when downgrading to older
server versions which manifests itself under these
circumstances:
1. Create a view v_orig in MySQL 5.0.72 or higher.
2. Rename the view to v_new and then back to v_orig.
3. Downgrade to an older 5.0.x server and run mysql_upgrade.
4. Try to rename v_orig to v_new again. This operation
fails.
As a workaround to avoid this problem, use either of these
approaches:
+ Dump your data using mysqldump before downgrading and
reload the dump file after downgrading.
+ Instead of renaming a view after the downgrade, drop it
and recreate it.
The downgrade problem introduced by the fix for this bug has
been addressed as Bug#40021: http://bugs.mysql.com/40021.
(Bug#17823: http://bugs.mysql.com/17823)

- CHECK TABLE ... FOR UPGRADE did not check for incompatible
collation changes made in MySQL 5.0.48. (This also affects
mysqlcheck and mysql_upgrade, which cause that statement to be
executed.) (Bug#40984: http://bugs.mysql.com/40984)
See also Bug#39585: http://bugs.mysql.com/39585.

- The FEDERATED handler had a memory leak.
(Bug#40875: http://bugs.mysql.com/40875)

- Prepared statements allowed invalid dates to be inserted when
the ALLOW_INVALID_DATES SQL mode was not enabled.
(Bug#40365: http://bugs.mysql.com/40365)

- mc.exe is no longer needed to compile MySQL on Windows. This
makes it possible to build MySQL from source using Visual
Studio Express 2008. (Bug#40280: http://bugs.mysql.com/40280)

- Support for the revision field in .frm files has been removed.
This addresses the downgrading problem introduced by the fix
for Bug#17823: http://bugs.mysql.com/17823.
(Bug#40021: http://bugs.mysql.com/40021)

- If the operating system is configured to return leap seconds
from OS time calls or if the MySQL server uses a time zone
definition that has leap seconds, functions such as NOW()
could return a value having a time part that ends with :59:60
or :59:61. If such values are inserted into a table, they
would be dumped as is by mysqldump but considered invalid when
reloaded, leading to backup/restore problems.
Now leap second values are returned with a time part that ends
with :59:59. This means that a function such as NOW() can
return the same value for two or three consecutive seconds
during the leap second. It remains true that literal temporal
values having a time part that ends with :59:60 or :59:61 are
considered invalid.
For additional details about leap-second handling, see Section
9.7.2, "Time Zone Leap Second Support."
(Bug#39920: http://bugs.mysql.com/39920)

- The server could crash during a sort-order optimization of a
dependent subquery. (Bug#39844: http://bugs.mysql.com/39844)

- With the ONLY_FULL_GROUP_BY SQL mode enabled, the check for
non-aggregated columns in queries with aggregate functions,
but without a GROUP BY clause was treating all the parts of
the query as if they were in the select list. This is fixed by
ignoring the non-aggregated columns in the WHERE clause.
(Bug#39656: http://bugs.mysql.com/39656)

- CHECK TABLE failed for MyISAM INFORMATION_SCHEMA tables.
(Bug#39541: http://bugs.mysql.com/39541)

- For a TIMESTAMP column in an InnoDB table, testing the column
with multiple conditions in the WHERE clause caused a server
crash. (Bug#39353: http://bugs.mysql.com/39353)

- The server returned a column type of VARBINARY rather than
DATE as the result from the COALESCE(), IFNULL(), IF(),
GREATEST(), or LEAST() functions or CASE expression if the
result was obtained using filesort in an anonymous temporary
table during the query execution.
(Bug#39283: http://bugs.mysql.com/39283)

- References to local variables in stored procedures are
replaced with NAME_CONST(name, value) when written to the
binary log. However, an "illegal mix of collation" error might
occur when executing the log contents if the value's collation
differed from that of the variable. Now information about the
variable collation is written as well.
(Bug#39182: http://bugs.mysql.com/39182)

- Some recent releases for Solaris 10 were built on Solaris 10
U5, which included a new version of libnsl.so that does not
work on U4 or earlier. To correct this, Solaris 10 builds now
are created on machines that do not have that upgraded
libnsl.so, so that they will work on Solaris 10 installations
both with and without the upgraded libnsl.so.
(Bug#39074: http://bugs.mysql.com/39074)

- With binary logging enabled CREATE VIEW was subject to
possible buffer overwrite and a server crash.
(Bug#39040: http://bugs.mysql.com/39040)

- Queries of the form SELECT ... REGEXP BINARY NULL could lead
to a hung or crashed server.
(Bug#39021: http://bugs.mysql.com/39021)

- Statements of the form INSERT ... SELECT .. ON DUPLICATE KEY
UPDATE col_name = DEFAULT could result in a server crash.
(Bug#39002: http://bugs.mysql.com/39002)

- Column names constructed due to wild-card expansion done
inside a stored procedure could point to freed memory if the
expansion was performed after the first call to the stored
procedure. (Bug#38823: http://bugs.mysql.com/38823)

- Repeated CREATE TABLE ... SELECT statements, where the created
table contained an AUTO_INCREMENT column, could lead to an
assertion failure. (Bug#38821: http://bugs.mysql.com/38821)

- If delayed insert failed to upgrade the lock, it did not free
the temporary memory storage used to keep newly constructed
BLOB values in memory, resulting in a memory leak.
(Bug#38693: http://bugs.mysql.com/38693)

- A server crash resulted from concurrent execution of a
multiple-table UPDATE that used a NATURAL or USING join
together with FLUSH TABLES WITH READ LOCK or ALTER TABLE for
the table being updated.
(Bug#38691: http://bugs.mysql.com/38691)

- On ActiveState Perl, mysql-test-run.pl --start-and-exit
started but did not exit.
(Bug#38629: http://bugs.mysql.com/38629)

- Server-side cursors were not initialized properly, which could
cause a server crash. (Bug#38486: http://bugs.mysql.com/38486)

- Stored procedures involving substrings could crash the server
on certain platforms due to invalid memory reads.
(Bug#38469: http://bugs.mysql.com/38469)

- A server crash or Valgrind warnings could result when a stored
procedure selected from a view that referenced a function.
(Bug#38291: http://bugs.mysql.com/38291)

- Incorrect handling of aggregate functions when loose index
scan was used caused a server crash.
(Bug#38195: http://bugs.mysql.com/38195)

- Queries containing a subquery with DISTINCT and ORDER BY could
cause a server crash. (Bug#38191: http://bugs.mysql.com/38191)

- Queries with a HAVING clause could return a spurious row.
(Bug#38072: http://bugs.mysql.com/38072)

- The server crashed if an argument to a stored procedure was a
subquery that returned more than one row.
(Bug#37949: http://bugs.mysql.com/37949)

- When analyzing the possible index use cases, the server was
incorrectly reusing an internal structure, leading to a server
crash. (Bug#37943: http://bugs.mysql.com/37943)

- A SELECT with a NULL NOT IN condition containing a complex
subquery from the same table as in the outer select caused an
assertion failure. (Bug#37894: http://bugs.mysql.com/37894)

- For InnoDB tables, ORDER BY ... DESC sometimes returned
results in ascending order.
(Bug#37830: http://bugs.mysql.com/37830)

- If a table has a BIT NOT NULL column c1 with a length shorter
than 8 bits and some additional NOT NULL columns c2, ..., and
a SELECT query has a WHERE clause of the form (c1 = constant)
AND c2 ..., the query could return an unexpected result set.
(Bug#37799: http://bugs.mysql.com/37799)

- Nesting of IF() inside of SUM() could cause an extreme server
slowdown. (Bug#37662: http://bugs.mysql.com/37662)

- TIMEDIFF() was erroneously treated as always returning a
positive result. Also, CAST() of TIME values to DECIMAL
dropped the sign of negative values.
(Bug#37553: http://bugs.mysql.com/37553)

- mysqlcheck used SHOW FULL TABLES to get the list of tables in
a database. For some problems, such as an empty .frm file for
a table, this would fail and mysqlcheck then would neglect to
check other tables in the database.
(Bug#37527: http://bugs.mysql.com/37527)

- The <=> operator could return incorrect results when comparing
NULL to DATE, TIME, or DATETIME values.
(Bug#37526: http://bugs.mysql.com/37526)

- Updating a view with a subquery in the CHECK option could
cause an assertion failure.
(Bug#37460: http://bugs.mysql.com/37460)

- Statements that displayed the value of system variables (for
example, SHOW VARIABLES) expect variable values to be encoded
in character_set_system. However, variables set from the
command line such as basedir or datadir were encoded using
character_set_filesystem and not converted correctly.
(Bug#37339: http://bugs.mysql.com/37339)

- For a MyISAM table with CHECKSUM = 1 and ROW_FORMAT = DYNAMIC
table options, a data consistency check (maximum record
length) could fail and cause the table to be marked as
corrupted. (Bug#37310: http://bugs.mysql.com/37310)

- The max_length result set metadata value was calculated
incorrectly under some circumstances.
(Bug#37301: http://bugs.mysql.com/37301)

- CREATE INDEX could crash with InnoDB plugin 1.0.1.
(Bug#37284: http://bugs.mysql.com/37284)

- The NO_BACKSLASH_ESCAPES SQL mode was ignored for LOAD DATA
INFILE and SELECT INTO ... OUTFILE. The setting is taken into
account now. (Bug#37114: http://bugs.mysql.com/37114)

- On a 32-bit server built without big tables support, the
offset argument in a LIMIT clause might be truncated due to a
64-bit to 32-bit cast.
(Bug#37075: http://bugs.mysql.com/37075)

- If the server failed to expire binary log files at startup, it
could crash. (Bug#37027: http://bugs.mysql.com/37027)

- Use of CONVERT() with GROUP BY to convert numeric values to
CHAR could return truncated results.
(Bug#36772: http://bugs.mysql.com/36772)

- A query which had an ORDER BY DESC clause that is satisfied
with a reverse range scan could cause a server crash for some
specific CPU/compiler combinations.
(Bug#36639: http://bugs.mysql.com/36639)

- Dumping information about locks in use by sending a SIGHUP
signal to the server or by invoking the mysqladmin debug
command could lead to a server crash in debug builds or to
undefined behavior in production builds.
(Bug#36579: http://bugs.mysql.com/36579)

- The mysql client, when built with Visual Studio 2005, did not
display Japanese characters.
(Bug#36279: http://bugs.mysql.com/36279)

- When the fractional part in a multiplication of DECIMAL values
overflowed, the server truncated the first operand rather than
the longest. Now the server truncates so as to produce more
precise multiplications.
(Bug#36270: http://bugs.mysql.com/36270)

- Hostname values in SQL statements were not being checked for
'@', which is illegal according to RFC952.
(Bug#35924: http://bugs.mysql.com/35924)

- The UUID() function returned UUIDs with the wrong time; this
was because the offset for the time part in UUIDs was
miscalculated. (Bug#35848: http://bugs.mysql.com/35848)

- mysql_install_db failed on machines that had the hostname set
to localhost. (Bug#35754: http://bugs.mysql.com/35754)

- Dynamic plugins failed to load on i5/OS.
(Bug#35743: http://bugs.mysql.com/35743)

- Freeing of an internal parser stack during parsing of complex
stored programs caused a server crash.
(Bug#35577: http://bugs.mysql.com/35577,
Bug#37269: http://bugs.mysql.com/37269,
Bug#37228: http://bugs.mysql.com/37228)

- Index scans performed with the sort_union() access method
returned wrong results, caused memory to be leaked, and caused
temporary files to be deleted when the limit set by
sort_buffer_size was reached.
(Bug#35477: http://bugs.mysql.com/35477,
Bug#35478: http://bugs.mysql.com/35478)

- If the server crashed with an InnoDB error due to
unavailability of undo slots, errors could persist during
rollback when the server was restarted: There are two UNDO
slot caches (for INSERT and UPDATE). If all slots end up in
one of the slot caches, a request for a slot from the other
slot cache would fail. This can happen if the request is for
an UPDATE slot and all slots are in the INSERT slot cache, or
vice versa. (Bug#35352: http://bugs.mysql.com/35352)

- For InnoDB tables, ALTER TABLE DROP failed if the name of the
column to be dropped began with "foreign".
(Bug#35220: http://bugs.mysql.com/35220)

- perror on Windows did not know about Win32 system error codes.
(Bug#34825: http://bugs.mysql.com/34825)

- Queries of the form SELECT ... WHERE string = ANY(...) failed
when the server used a single-byte character set and the
client used a multi-byte character set.
(Bug#34760: http://bugs.mysql.com/34760)
See also Bug#20835: http://bugs.mysql.com/20835.

- Using OPTIMIZE TABLE as the first statement on an InnoDB table
with an AUTO_INCREMENT column could cause a server crash.
(Bug#34286: http://bugs.mysql.com/34286)

- mysql_install_db failed if the server was running with an SQL
mode of TRADITIONAL. This program now resets the SQL mode
internally to avoid this problem.
(Bug#34159: http://bugs.mysql.com/34159)

- For a stored procedure containing a SELECT * ... RIGHT JOIN
query, execution failed for the second call.
(Bug#33811: http://bugs.mysql.com/33811)

- Previously, use of index hints with views (which do not have
indexes) produced the error ERROR 1221 (HY000): Incorrect
usage of USE/IGNORE INDEX and VIEW. Now this produces ERROR
1176 (HY000): Key '...' doesn't exist in table '...', the same
error as for base tables without an appropriate index.
(Bug#33461: http://bugs.mysql.com/33461)

- Cached queries that used 256 or more tables were not properly
cached, so that later query invalidation due to a TRUNCATE
TABLE for one of the tables caused the server to hang.
(Bug#33362: http://bugs.mysql.com/33362)

- Some division operations produced a result with incorrect
precision. (Bug#31616: http://bugs.mysql.com/31616)

- mysql_upgrade attempted to use the /proc filesystem even on
systems that do not have it.
(Bug#31605: http://bugs.mysql.com/31605)

- mysqldump could fail to dump views containing a large number
of columns. (Bug#31434: http://bugs.mysql.com/31434)

- On NetWare, mysql_install_db could appear to execute normally
even if it failed to create the initial databases.
(Bug#30129: http://bugs.mysql.com/30129)

- The Serbian translation for the ER_INCORRECT_GLOBAL_LOCAL_VAR
error was corrected. (Bug#29738: http://bugs.mysql.com/29738)

- XA transaction rollbacks could result in corrupted transaction
states and a server crash.
(Bug#28323: http://bugs.mysql.com/28323)

- In some cases, the parser interpreted the ; character as the
end of input and misinterpreted stored program definitions.
(Bug#26030: http://bugs.mysql.com/26030)

- For access to the INFORMATION_SCHEMA.VIEWS table, the server
did not check the SHOW VIEW and SELECT provileges, leading to
inconsistency between output from that table and the SHOW
CREATE VIEW statement.
(Bug#22763: http://bugs.mysql.com/22763)

- The FLUSH PRIVILEGES statement did not produce an error when
it failed. (Bug#21226: http://bugs.mysql.com/21226)

- A race condition between the mysqld.exe server and the Windows
service manager could lead to inability to stop the server
from the service manager.
(Bug#20430: http://bugs.mysql.com/20430)

- mysqld_safe would sometimes fail to remove the pid file for
the old mysql process after a crash. As a result, the server
would fail to start due to a false A mysqld process already
exists... error. (Bug#11122: http://bugs.mysql.com/11122)