MYSQL事件查看器使用介绍

Posted 2020-11-10 dullbaby

要查看当前是否已开启事件调度器 
SHOW VARIABLES LIKE ‘event_scheduler‘; 

开启事件查看器 
SET GLOBAL event_scheduler = 1; 

创建事件 
语法： 
CREATE EVENT [IF NOT EXISTS] event_name 
ON SCHEDULE schedule 
[ON COMPLETION [NOT] PRESERVE] 
[ENABLE | DISABLE] 
[COMMENT ‘comment‘] 
DO sql_statement; 

实例： 
CREATE EVENT updateInfoStatus 
ON SCHEDULE EVERY 30 MINUTE 
DO 
UPDATE `jd_article` SET `status` = 0 WHERE `status` = 1 AND `date` <= now( ); 

修改事件 
语法： 
ALTER EVENT event_name 
[ON SCHEDULE schedule] 
[RENAME TO new_event_name] 
[ON COMPLETION [NOT] PRESERVE] 
[COMMENT ‘comment‘] 
[ENABLE | DISABLE] 
[DO sql_statement] 

实例： 
ALTER EVENT updateInfoStatus 
ON SCHEDULE EVERY 30 MINUTE 
DO 
UPDATE `jd_article` SET `status` = 0 WHERE `status` = 1 AND `date` <= now( ); 

删除事件 
DROP EVENTS IF EXISTS updateInfoStatus 

临时关闭事件 
ALTER EVENTS updateInfoStatus DISABLE 

开启事件 
ALTER EVENTS updateInfoStatus ENABLE 

查看事件详细信息 
SELECT * FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_NAME = ‘updateInfoStatus‘ AND EVENT_SCHEMA = ‘jdwc‘ 

查看所有事件 
SHOW EVENTS 

查看事件创建信息 
SHOW CREATE EVENT updateInfoStatus