mysql存储过程中使用游标的实例_MySQL

DELIMITER $$

DROP PROCEDURE IF EXISTS getUserInfo $$

CREATE PROCEDURE getUserInfo(in date_day datetime)
--
-- 实例
-- MYSQL存储过程名为：getUserInfo
-- 参数为：date_day日期格式:2008-03-08
--
BEGIN
declare _userName varchar(12); -- 用户名
declare _chinese int ; -- 语文
declare _math int ; -- 数学
declare done int;

-- 定义游标
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;

-- 获取昨天的日期
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; -- 取数据

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 ;