mysqlcheck:表维护和维修程序_MySQL
mysqlcheck客户端可以检查和修复MyISAM表。它还可以优化和分析表。
mysqlcheck的功能类似myisamchk,但其工作不同。主要差别是当mysqld服务器在运行时必须使用mysqlcheck,而myisamchk应用于服务器没有运行时。使用mysqlcheck的好处是不需要停止服务器来检查或修复表。
Mysqlcheck为用户提供了一种方便的使用SQL语句CHECK TABLE、REPAIR TABLE、ANALYZE TABLE和OPTIMIZE TABLE的方式。它确定在要执行的操作中使用使用哪个语句,然后将语句发送到要执行的服务器上。
有3种方式来调用mysqlcheck:
shell> mysqlcheck[options] db_name [tables]
shell> mysqlcheck[options] ---database DB1 [DB2 DB3...]
shell> mysqlcheck[options] --all--database
如果没有指定任何表或使用---database或--all--database选项,则检查整个数据库。
同其它客户端比较,mysqlcheck有一个特殊特性。重新命名二进制可以更改检查表的默认行为(--check)。如果你想要一个工具默认可以修复表的工具,只需要将mysqlcheck重新复制为mysqlrepair,或者使用一个符号链接mysqlrepair链接mysqlcheck。如果调用mysqlrepair,可按照命令修复表。
下面的名可用来更改mysqlcheck的默认行为:
mysqlrepair 默认选项为--repair
mysqlanalyze 默认选项为--analyze
mysqloptimize 默认选项为--optimize
mysqlcheck
支持下面的选项:
? ---help,-?
显示帮助消息并退出。
? --all--database,-A
检查所有数据库中的所有表。与使用---database选项相同,在命令行中命名所有数据库。
? --all-in-1,-1
不是为每个表发出一个语句,而是为命名数据库中待处理的所有表的每个数据库执行一个语句。
? --analyze,-a
分析表。
? --auto-repair

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