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When Privilege Changes Take Effect
Home Database Mysql Tutorial mysql数据库权限更改后的生效时间_MySQL

mysql数据库权限更改后的生效时间_MySQL

Jun 01, 2016 pm 01:11 PM

When Privilege Changes Take Effect

1.当mysqld启动时,所有授权表的内容被读进内存并且从此时生效。


2.当服务器注意到授权表被改变了时,现存的客户端连接有如下影响:

  • 表和列权限在客户端的下一次请求时生效。

  • 数据库权限改变在下一个USE db_name命令生效。

  • 全局权限的改变和密码改变在下一次客户端连接时生效。


3.如果用GRANT、REVOKE或SET PASSWORD对授权表进行修改,服务器会注意到并立即重新将授权表载入内存。


4.如果你手动地修改授权表(使用INSERT、UPDATE或DELETE等等),你应该执行mysqladmin flush-privileges或mysqladmin reload告诉服务器再装载授权表,否则你的更改将不会生效,除非你重启服务器。


5.如果你直接更改了授权表但忘记重载,重启服务器后你的更改方生效。这样可能让你迷惑为什么你的更改没有什么变化!



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