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;

SELECT * FROM t;