发布于 2015-06-04 00:51:48 | 102 次阅读 | 评论: 0 | 来源: 网友投递
Mysql关系型数据库管理系统
MySQL是一个开放源码的小型关联式数据库管理系统，开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低，尤其是开放源码这一特点，许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。
MySQL 5.5.44 发布，此版本主要是 bug 修复：
InnoDB; Partitioning：The CREATE_TIME column of the INFORMATION_SCHEMA.TABLES table now shows the correct table creation time for partitioned InnoDB tables. The CREATE_TIME column of the INFORMATION_SCHEMA.PARTITIONS table now shows the correct partition creation time for a partition of partitioned InnoDB tables.
The UPDATE_TIME column of the INFORMATION_SCHEMA.TABLES table now shows when a partitioned InnoDB table was last updated by an INSERT, DELETE, or UPDATE. The UPDATE_TIME column of the INFORMATION_SCHEMA.PARTITIONS table now shows when a partition of a partitioned InnoDB table was last updated. (Bug #69990, Bug #17299181)
InnoDB: An assertion was raised on shutdown due to XA PREPARE transactions holding explicit locks. (Bug #20816223)
InnoDB: Removal of a foreign key object from the data dictionary cache during error handling caused the server to exit. (Bug #20442523)
InnoDB: SHOW ENGINE INNODB STATUS output showed negative reservation and signal count values due to a counter overflow error. (Bug #20417397)
InnoDB: Estimates that were too low for the size of merge chunks in the result sorting algorithm caused a server exit. (Bug #20049521)
SHOW VARIABLES mutexes were being locked twice, resulting in a server exit. (Bug #20788853)
A Provides rule in RPM .spec files misspelled“mysql-embedded”as“mysql-emdedded”. (Bug #20734434)
Under certain conditions, the libedit command-line library could write outside an array boundary and cause a client program crash. (Bug #20318154)
Host value matching for the grant tables could fail to use the most specific of values that contained wildcard characters. (Bug #20181776)
A user with a name of event_scheduler could view the Event Scheduler process list without the PROCESS privilege. (Bug #20007583, Bug #20754369)
SHOW GRANTS after connecting using a proxy user could display the password hash of the proxied user. (Bug #19817663)
For a prepared statement with an ORDER BY that refers by column number to a GROUP_CONCAT() expression that has an outer reference, repeated statement execution could cause a server exit. (Bug #19814337)
Loading corrupt spatial data into a MyISAM table could cause the server to exit during index building. (Bug #19573096)
Certain queries for the INFORMATION_SCHEMA TABLES and COLUMNS tables could lead to excessive memory use when there were large numbers of empty InnoDB tables. (Bug #72322, Bug #18592390)
MySQL failed to compile using OpenSSL 0.9.8e. (Bug #68999, Bug #16861371)
下载：http://dev.mysql.com/downloads/mysql/
MySQL是一个开放源码的小型关联式数据库管理系统，开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低，尤其是开放源码这一特点，许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。