比如说创建一个比赛。定义比赛时间。没有达到比赛时间时比赛的属性字段值为‘waitting’
当到比赛时间时将字段值改为‘running’
我创建了一个调度器
set @runtime='2008-03-08 18:20:22'
select contest.startTime into @runtime from contest where contest.status='waitting' and id=14
CREATE EVENT update_contest_status
ON SCHEDULE AT TIMESTAMP @runtime
DO update contest set contest.status='Running');
SHOW PROCESSLIST;