mysql定時任務event——清理過期數據 （轉）
1.查詢是否開啟事件調度
SHOW VARIABLES LIKE ‘event_scheduler‘;
2.開啟事件調度
臨時： SET GLOBAL event_scheduler = 1;
永久： vim /etc/my.cnf event_scheduler=ON
[mysqld]
event_scheduler=ON //這一行加入mysqld標簽下
3.創建p_del_count存儲過程。 接收傳入參數30並執行刪除數據操作，刪除大於30天的數據。
drop procedure if exists p_del_count;
create procedure p_del_count(IN `date_inter` INT)
BEGIN
delete from t_req_log where (TO_DAYS(NOW()) - TO_DAYS(FROM_UNIXTIME(unix_timestamp(time),‘%Y%m%d‘))) >=date_inter;
END;
BEGIN
delete from t_warnmsg where (TO_DAYS(NOW()) - TO_DAYS(FROM_UNIXTIME(unix_timestamp(warntime),‘%Y%m%d‘))) >=date_inter;
delete from t_collection where (TO_DAYS(NOW()) - TO_DAYS(FROM_UNIXTIME(unix_timestamp(colltime),‘%Y%m%d‘))) >=date_inter;
END
4.創建定時任務 從2018-05-15 00:00:00起每一天執行一次p_del_count這個存儲過程，並將參數傳給 p_del_count存儲過程
drop event if exists e_del_t_req_log;
create event e_del_t_req_log
on schedule every 1 day starts ‘2018-05-15 00:00:00‘
on completion not preserve enable do call p_del_count (30);
on schedule every 1 day starts ‘2019-05-3 00:00:00‘
5.查看已有定時事件任務 SHOW EVENTS;
6.事件的開啟與關閉 開啟某事件：ALTER EVENT e_del_t_req_log
關閉某事件：ALTER EVENT e_del_t_req_log ON COMPLETION PRESERVE DISABLE;
mysql定時任務event——清理過期數據 （轉）