查看event是否開啟: show variables like '%sche%';?
將事件計劃開啟: set global event_scheduler=1;?
關閉事件任務: alter event e_test ON COMPLETION PRESERVE DISABLE;?
開戶事件任務: alter event e_test ON COMPLETION PRESERVE ENABLE;?

簡單實例.?
創(chuàng)建表 CREATE TABLE test(endtime DATETIME);?

創(chuàng)建存儲過程test?
CREATE PROCEDURE test ()?
BEGIN?
update examinfo SET endtime = now() WHERE id = 14;?
END;?

創(chuàng)建event e_test?
CREATE EVENT if not exists e_test?
on schedule every 30 second?
on completion preserve?
do call test();?

每隔30秒將執(zhí)行存儲過程test,將當前時間更新到examinfo表中id=14的記錄的endtime字段中去?




1) 首先來看一個簡單的例子來演示每秒插入一條記錄到數(shù)據(jù)表?

USE test;?
CREATE TABLE aaa (timeline TIMESTAMP);?
CREATE EVENT e_test_insert?
ON SCHEDULE EVERY 1 SECOND?
DO INSERT INTO test.aaa VALUES (CURRENT_TIMESTAMP);?
等待3秒鐘后，再執(zhí)行查詢看看：?

copyright dedecms

mysql> SELECT * FROM aaa;?
+---------------------+?
| timeline |?
+---------------------+?
| 2007-07-18 20:44:26 |?
| 2007-07-18 20:44:27 |?
| 2007-07-18 20:44:28 |?
+---------------------+?
2) 5天后清空test表：?

CREATE EVENT e_test?
ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 5 DAY?
DO TRUNCATE TABLE test.aaa;?
3) 2007年7月20日12點整清空test表：?

CREATE EVENT e_test?
ON SCHEDULE AT TIMESTAMP '2007-07-20 12:00:00'?
DO TRUNCATE TABLE test.aaa;?
4) 每天定時清空test表：?

CREATE EVENT e_test?
ON SCHEDULE EVERY 1 DAY?
DO TRUNCATE TABLE test.aaa;?
5) 5天后開啟每天定時清空test表：?

CREATE EVENT e_test?
ON SCHEDULE EVERY 1 DAY?
STARTS CURRENT_TIMESTAMP + INTERVAL 5 DAY?
DO TRUNCATE TABLE test.aaa;?
6) 每天定時清空test表，5天后停止執(zhí)行：?

CREATE EVENT e_test?
ON SCHEDULE EVERY 1 DAY?
ENDS CURRENT_TIMESTAMP + INTERVAL 5 DAY?
DO TRUNCATE TABLE test.aaa;?
7) 5天后開啟每天定時清空test表，一個月后停止執(zhí)行：? 本文來自織夢 ?

CREATE EVENT e_test?
ON SCHEDULE EVERY 1 DAY?
STARTS CURRENT_TIMESTAMP + INTERVAL 5 DAY?
ENDS CURRENT_TIMESTAMP + INTERVAL 1 MONTH?
DO TRUNCATE TABLE test.aaa;?
[ON COMPLETION [NOT] PRESERVE]可以設置這個事件是執(zhí)行一次還是持久執(zhí)行，默認為NOT PRESERVE。?
8) 每天定時清空test表(只執(zhí)行一次，任務完成后就終止該事件)：?

CREATE EVENT e_test?
ON SCHEDULE EVERY 1 DAY?
ON COMPLETION NOT PRESERVE?
DO TRUNCATE TABLE test.aaa;?
[ENABLE | DISABLE]可是設置該事件創(chuàng)建后狀態(tài)是否開啟或關閉，默認為ENABLE。?
[COMMENT ‘comment’]可以給該事件加上注釋。?

三、修改事件(ALTER EVENT)?
ALTER EVENT event_name?
[ON SCHEDULE schedule]?
[RENAME TO new_event_name]?
[ON COMPLETION [NOT] PRESERVE]?
[COMMENT 'comment']?
[ENABLE | DISABLE]?
[DO sql_statement]?
1) 臨時關閉事件?

ALTER EVENT e_test DISABLE;?
2) 開啟事件?

ALTER EVENT e_test ENABLE;?
3) 將每天清空test表改為5天清空一次：?

ALTER EVENT e_test?
ON SCHEDULE EVERY 5 DAY;?
四、刪除事件(DROP EVENT)

語 法很簡單，如下所示：?

DROP EVENT [IF EXISTS] event_name?
例如刪除前面創(chuàng)建的e_test事件?

DROP EVENT e_test;?
當然前提是這個事件存在，否則會產(chǎn)生ERROR 1513 (HY000): Unknown event錯誤，因此最好加上IF EXISTS?

DROP EVENT IF EXISTS e_test;?

create event test?
ON SCHEDULE AT '2007-09-01 12:00:00' + INTERVAL 1 DAY?
on completion not preserve?
do insert into yyy values('hhh','uuu');?

解釋：從2007-09-01開始，每天對表yyy在12：00：00進行一個插入操作。而且只執(zhí)行一次（on completion not preserve ）?

我的計劃任務為：?

create event sysplan?
ON SCHEDULE AT '2010-05-22 23:00:00' + INTERVAL 1 DAY?
on completion not preserve?
do truncate table bjproj.ae_tmp;?


三、通過設定全局變量event_scheduler 的值即可動態(tài)的控制事件調(diào)度器是否啟用。?
查看是否event_scheduler開啟mysql> SHOW VARIABLES LIKE '%event%';?
設置開啟mysql> SET GLOBAL event_scheduler=ON;?
四、例子:?
每分鐘插入一條日志:DELIMITER //CREATE EVENT `user_log_event` ON SCHEDULE EVERY 1 MINUTE STARTS '2010-12-27 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO BEGIN INSERT INTO log SET addtime=NOW();END//

織夢好，好織夢

調(diào)用存儲過程:DELIMITER //CREATE EVENT `user_log_event` ON SCHEDULE EVERY 1 DAY STARTS '2010-00-00 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO BEGIN CALL user_log_prov();END//?

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mysql怎么讓一個存儲過程定時執(zhí)行