mysql 结果集问题

zzyoucan 2015-07-14 11:27:35

BEGIN
#Routine body goes here...
DECLARE int_unreaded_mail_del_time INT DEFAULT 0;
DECLARE int_readed_mail_del_time INT DEFAULT 0;

DECLARE int_send_time INT DEFAULT 0;
DECLARE int_staus INT DEFAULT 0;
DECLARE int_mailid INT DEFAULT 0;

DECLARE _DONE INT DEFAULT 0;
DECLARE cur CURSOR FOR SELECT `mail_id`, UNIX_TIMESTAMP(`send_time`), `status` FROM `user_mail` WHERE `user_id` = in_user_id;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET _DONE = 1;

SELECT `value` INTO int_unreaded_mail_del_time FROM `sys_setting` WHERE `key` = 'Mail_UnReaded_Mail_Valid_Time';
SELECT `value` INTO int_readed_mail_del_time FROM `sys_setting` WHERE `key` = 'Mail_Readed_Mail_Valid_Time';

#遍历邮件将无效邮件删除
OPEN cur;
REPEAT
FETCH cur INTO int_mailid, int_send_time, int_staus;

IF NOT _DONE THEN

IF int_staus = 1 THEN#已读
IF int_send_time + int_readed_mail_del_time < UNIX_TIMESTAMP(Now()) THEN
#给玩家添加道具
#CALL _give_out_of_date_mail_attach_to_user(int_mailid);
DELETE FROM `user_mail` WHERE `mail_id` = int_mailid;
DELETE FROM `user_mail_attach` WHERE `mail_id` = int_mailid;
END IF;
ELSEIF int_staus = 2 THEN#未读
IF int_send_time + int_unreaded_mail_del_time < UNIX_TIMESTAMP(Now()) THEN
#CALL _give_out_of_date_mail_attach_to_user(int_mailid);
DELETE FROM `user_mail` WHERE `mail_id` = int_mailid;
DELETE FROM `user_mail_attach` WHERE `mail_id` = int_mailid;
END IF;
END IF;
END IF;
UNTIL _DONE END REPEAT;
CLOSE cur;

#获取玩家邮件信息
SELECT `mail_id`, UNIX_TIMESTAMP(`send_time`) as `send_time`, `content`, `status`, `type` FROM user_mail WHERE `user_id` = in_user_id;
SELECT `mail_id`, `id`, `element_id`, `type`, `num` FROM `user_mail_attach` WHERE `user_id` = in_user_id;


END

我就在这里面有两个select但怎么产生了三个结果集,但第三个结果集是空的,第三个结果集是怎么产生的?能帮我看看吗
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zzyoucan 2015-07-15
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我就搞不懂明明是两个结果集的,存储过程产生三个,并且第三个利用mysql_store_result(con)是空指针
zzyoucan 2015-07-14
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存储过程啥都不写,也会产生一个空的结果集

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