mysql 游标的使用方法

BEGIN

/*计算用户提成总金额*/

declare amountPrice,pays,rates,goodsPrice DECIMAL(10,2) DEFAULT 0;

DECLARE  flag int,getUserId;

#if(userlevel=1) then

SELECT  member_id into getUserId  from 33hao_member where openid=open_id

declare cur cursor for  select commission1_rate rates,commission1_pay pays,goods_price from 33hao_goods_common;

 DECLARE CONTINUE HANDLER FOR NOT FOUND SET flag=1;

    SET flag=0;

OPEN cur;

REPEAT

FETCH cur into rates,pays,goodsPrice;

if(rates=null) then

  set amountPrice=amountPrice+pays;

ELSE

   set  amountPrice=amountPrice+goodsPrice*rates;

end if;

UNTIL flag end REPEAT;

CLOSE cur;

RETURN  amountPrice;

end