mysql怎么让一个存储过程定时执行

比如说每天的12：30执行

查看event是否开启: show variables like '%sche%'; 
将事件计划开启: set global event_scheduler=1; 
关闭事件任务: alter event e_test ON COMPLETION PRESERVE DISABLE; 
开户事件任务: alter event e_test ON COMPLETION PRESERVE ENABLE; 

简单实例. 
创建表 CREATE TABLE test(endtime DATETIME); 

创建存储过程test 
     CREATE PROCEDURE test () 
     BEGIN 
          update examinfo SET endtime = now() WHERE id = 14; 
     END; 

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

     每隔30秒将执行存储过程test,将当前时间更新到examinfo表中id=14的记录的endtime字段中去.