MySQL 5.5.41 发布，此版本更新内容如下：
编译改进
移除了旧版本 Mac OS X 和 XCode 版本的 CMake 工作区 (Bug #18510941) Previously, the MYSQL_MAINTAINER_MODE
CMake option was turned on by default for debug builds and off for release builds, and MYSQL_MAINTAINER_MODE caused -Werror to be enabled when building with GCC. (Bug #18313717) 修改了构建支持，为 Clang 生成跟 gcc 一样的警告 (Bug #17959689) CMake configuration for the Clang compiler sets more appropriate flags
for building on Linux. Specifically, -g
-fno-omit-frame-pointer -fno-strict-aliasing is now added.
(Bug #17633291)
新功能和功能增强
Bugs 修复 InnoDB: An ALTER TABLE operation raised an assertion. (Bug #19908343) References: This bug is a regression of Bug #18806829. InnoDB:
In debug builds, setting the innodb_limit_optimistic_insert_debug debug
configuration option to 1 caused an infinite B-tree page split. (Bug #19904003, Bug #74605) InnoDB: The dict_set_corrupted() function attempted to update the clustered index of the SYS_INDEXES data dictionary table incorrectly. (Bug #19584379) InnoDB:
A procedure, called from a function to perform an operation on a
temporary table, caused the server to halt.
(Bug #19306524) InnoDB:
A CREATE TABLE operation that
failed with innodb_strict_mode=ON would
succeed without printing a warning with innodb_strict_mode=OFF. (Bug #17852083) Replication:
When using a MySQL version that had been compiled with the WITH_DEBUG option enabled, using expire_logs_days to purge
binary logs caused a restart to crash the server. This problem
arose after the fix for Bug #17283409. The fix ensures that current_thd is checked before calling DEBUG_SYNC().
(Bug #19553099) Replication: A kernel mutex contention was being caused because mysqlbinlog was calling localtime() for every event read, which in turn called stat(/etc/localtime). (Bug #72701, Bug #18808072) Replication:
The global scope for the sql_log_bin system variable has
been deprecated, and this variable can now be set with session
scope only. (Bug #67433, Bug #15868071) InnoDB permitted a foreign key to be created which referenced a parent table for which the user did not have sufficient privileges.
(Bug #18790730)
On Windows, the replace utility did not work. (Bug #16581605) On CentOS 6, specifying a relative path name for the --socket option caused MySQL startup script failure.
(Bug #74111, Bug #19775856) The IS_FREE_LOCK() and IS_USED_LOCK() function implementations contained a race condition due to which they
could access freed memory when a user lock was concurrently checked and freed.
(Bug #73123, Bug #19070633) mysql_setpermission failed to properly quote user names in SQL statements that it generated.
(Bug #66317, Bug #14486004)
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