mysql 存储过程、循环

CREATE PROCEDURE  questionProc()
BEGIN

 declare pgId int();
 declare pGuid varchar();
　-- 定义游标卡尺
 declare done boolean  DEFAULT TRUE;
 -- 获取数据到游标卡尺
 DECLARE cur CURSOR FOR select id,qid from tb_question;
-- 打开游标卡尺
OPEN cur;
　　-- 开始循环
    WHILE done do
      FETCH cur INTO pgId,pGuid;

        update tb_question_item set question_id=pgId where qid= pGuid;
   end while;
CLOSE cur;
END;

CALL questionProc();