MySQL定时器开启、调用实现代码
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2020-12-15
08:55:26
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MySQL定时器开启、调用实现代码定时器开启、调用实现代码
创建测试表
代码如下:
CREATE TABLE t
(
v VARCHAR(100) NOT NULL
) ENGINE INNODB DEFAULT CHARSET=utf8;
创建定时器 调用的存储过程
DELIMITER $$
DROP PROCEDURE IF EXISTS e_test $$
CREATE PROCEDURE e_test()
BEGIN
INSERT INTO t VALUES(‘1’);
END $$
DELIMITER ;
要使定时起作用 MySQL的常量GLOBAL event_scheduler必须为on或者是1
— 查看是否开启定时器
SHOW VARIABLES LIKE ‘%sche%’;
— 开启定时器 0：off 1：on
SET GLOBAL event_scheduler = 1;
— 创建事件
–每隔一秒自动调用e_test()存储过程
CREATE EVENT IF NOT EXISTS event_test
ON SCHEDULE EVERY 1 SECOND
ON COMPLETION PRESERVE
DO CALL e_test();
— 开启事件
ALTER EVENT event_test ON
COMPLETION PRESERVE ENABLE;
— 关闭事件
ALTER EVENT event_test ON
COMPLETION PRESERVE DISABLE;
从现在开始每隔九天定时执行
CREATE EVENT EVENT1
ON SCHEDULE EVERY 9 DAY STARTS NOW()
ON COMPLETION PRESERVE ENABLE
DO
BEGIN
CALL TOTAL();
END
每个月的一号凌晨1 点执行
CREATE EVENT EVENT2
ON SCHEDULE EVERY 1 MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL
DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 1 HOUR)
ON COMPLETION PRESERVE ENABLE
DO
BEGIN
CALL STAT();
END
每个季度一号的凌晨2点执行
CREATE EVENT TOTAL_SEASON_EVENT
ON SCHEDULE EVERY 1 QUARTER STARTS DATE_ADD(DATE_ADD(DATE(
CONCAT(YEAR(CURDATE()),’-‘,ELT(QUARTER(CURDATE()),1,4,7,10),’-‘,1)),INTERVAL 1 QUARTER),INTERVAL 2
HOUR)
ON COMPLETION PRESERVE ENABLE
DO
BEGIN
CALL SEASON_STAT();
END
每年1月1号凌晨四点执行
CREATE EVENT TOTAL_YEAR_EVENT
ON SCHEDULE EVERY 1 YEAR STARTS DATE_ADD(DATE(CONCAT(YEAR(CURDATE()) + 1,’-‘,1,’-‘,1)),INTERVAL 4
HOUR)
ON COMPLETION PRESERVE ENABLE
DO
BEGIN
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