DROP PROCEDURE IF EXISTS getUserInfo $$

CREATE PROCEDURE getUserInfo(in date_day datetime)
--
-- 實例
-- MYSQL存儲過程名為：getUserInfo
-- 參數為：date_day日期格式:2008-03-08
--
    BEGIN
declare _userName varchar(12); -- 用戶名
declare _chinese int ; -- 語文
declare _math int ;    -- 數學
declare done int;

-- 定義游標
DECLARE rs_cursor CURSOR FOR SELECT username,chinese,math from userInfo where datediff(createDate, date_day)=0;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;

-- 獲取昨天的日期
if date_day is null then
   set date_day = date_add(now(),interval -1 day);
end if;

open rs_cursor;
cursor_loop:loop
   FETCH rs_cursor into _userName, _chinese, _math; -- 取數據

   if done=1 then
    leave cursor_loop;
   end if;

-- 更新表
update infoSum set total=_chinese+_math where UserName=_userName;
end loop cursor_loop;
close rs_cursor;
    END$$
DELIMITER ;