-- 查看主键约束
SELECT * FROM information_schema.`TABLE_CONSTRAINTS`;

-- 查看外键约束
SELECT * FROM information_schema.`REFERENTIAL_CONSTRAINTS`;

-- 查看表权限信息
SELECT * FROM information_schema.`TABLE_PRIVILEGES`;

-- 查看所有列DML权限信息
SELECT * FROM information_schema.`COLUMN_PRIVILEGES`;

-- 查看表索引信息
SELECT * FROM information_schema.`STATISTICS`;

-- 查看用户权限信息
SELECT * FROM information_schema.`USER_PRIVILEGES`;

-- 查看触发器
SELECT * FROM information_schema.`TRIGGERS`;

-- 查看视图
SELECT * FROM `information_schema`.`VIEWS`;

-- 查看存储过程或存储函数
SELECT * FROM `information_schema`.`ROUTINES`;

--查看事件信息
SELECT * FROM information_schema.events;

备注:查看Events是否开启:
mysql> select @@global.event_scheduler;
mysql> show variables like 'event_scheduler';

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如何在MySQL元数据库里查看索引，约束，触发器，存储过程和事件的相关信息

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