mysql中游标在存储过程中的详细用法_MySQL

昨天写的一个东东，分享下给大家。

drop PROCEDURE  if exists sp_cleanUserData;
CREATE  PROCEDURE `sp_cleanUserData`() 
BEGIN
  /*定义游标*/
declare v_dt bigint(20) default 0 ;
declare v_num INT DEFAULT 0;

  /*游标循环到末尾时给定义的常量赋值*/
declare cur_userId   CURSOR FOR select  userId from  user_level_info    where  DATE_SUB(CURDATE(), INTERVAL 60 DAY) >= firstLoginDate and lvdeclare CONTINUE HANDLER FOR SQLSTATE '02000' SET v_dt = -1;
    /*开游标*/
OPEN  cur_userId;
        /*游标赋值*/
FETCH  cur_userId INTO v_dt;
 
set v_num=1;
         /* 循环体  */
WHILE ( v_dt !=-1 ) DO
/* 用户任务表 */
delete  from  task_user where user_id =v_dt;
/* 玩家公告  */
delete  from  user_action_info where userId =v_dt;

set v_num= v_num+1;
if  v_num>100 then
commit; 
set v_num=1;
end if;
        /*读取下一行的数据*/
        FETCH cur_userId INTO v_dt;
/*循环结束*/
END WHILE;
        /*关闭游标*/
CLOSE cur_userId;
END;
call sp_cleanUserData;