mysql里面不可以返回游标,很让人蛋疼,没oracle好,而且,mysql没有什么好的调试工具,也比较纠结.

下面是我写的一个mysql存储过程,里面使用到了游标,临时表,最终返回的是结果接,希望对大家有帮助:

DELIMITER $$

USE `realwar`$$

DROP PROCEDURE IF EXISTS `queryRemainsPoints`$$

CREATE DEFINER=`root`@`%` PROCEDURE `queryRemainsPoints`(

/*in startSize int,

in pageSize int,startSize,分页的起始位置,pageSize 分页的大小,

in queryUserName varchar(100),/*queryUserName根据用户名字来查找,

in remainP int,

in remainP1 INT,/*remainP 用户剩余军饷小,remainP1剩余军饷大

in sumP int,

IN sumP1 int, payP 用户充值总额小,payP 总金额大

in rats int ,

in rats1 int滞留率查询*/

)

BEGIN

DECLARE userNames VARCHAR(50);

DECLARE nickName VARCHAR(50);

DECLARE sumPoints INT;

DECLARE remainPoint INT;

DECLARE dayPay INT DEFAULT 0;

DECLARE dayCost INT;

DECLARE sumCost INT;

DECLARE dayRemainRats VARCHAR(50);

DECLARE sumRemainRats VARCHAR(50);

DECLARE    over INT DEFAULT 0;

/*定义一个游标,获得所有的用户*/

/*if(queryUserName is not null){

DECLARE usernameCur FOR SELECT rp.username AS userName FROM realwar_tool.play_money_pay_log rp where rp.username=queryUserName GROUP BY (rp.username);

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000'SET userName = NULL;

}else{

DECLARE usernameCur CURSOR FOR SELECT rp.username AS userName FROM realwar_tool.play_money_pay_log rp GROUP BY (rp.username);

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000'SET userName = NULL;*/

DECLARE usernameCur CURSOR FOR SELECT rp.username  FROM realwar_tool.play_money_pay_log rp GROUP BY (rp.username);

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000'SET userNames = NULL;

/*创建一个临时表,用来存放数据*/

DROP  TABLE IF EXISTS realwar.temp_remainsPoints;

CREATE TEMPORARY TABLE realwar.temp_remainsPoints(

sid INT(10) PRIMARY KEY AUTO_INCREMENT,

userName1 VARCHAR(100),

nickName1 VARCHAR(100),

sumPoints1 INT(10),

remainPoints1 INT(10),

dayPay1  INT(10),

dayCost1 INT(10),

dayRemainRats1 VARCHAR(10),

sumRemainRats1 VARCHAR(10)

);

OPEN usernameCur;/*打开游标*/

/*usernameCur:loop */

FETCH usernameCur INTO userNames;/*循环游标,给userName赋值*/

WHILE(userNames IS NOT NULL) DO

/*玩家昵称*/

SELECT (rp.nickName) INTO nickName  FROM realwar.playbaseinfo rp WHERE rp.UserName = userNames;

/*今日充值军饷*/

SELECT SUM(r1.change_money)*10 INTO dayPay FROM realwar_tool.play_money_pay_log r1 WHERE r1.username=userNames AND YEAR(FROM_UNIXTIME(r1.dateline)) = YEAR(SYSDATE())

AND MONTH(FROM_UNIXTIME(r1.dateline)) = MONTH(SYSDATE()) AND DATE(FROM_UNIXTIME(r1.dateline)) = DATE(SYSDATE());

IF(dayPay  IS NULL) THEN

SELECT 0 INTO dayPay FROM DUAL;

END IF;

/*用户总充值军饷或消费券*/

SELECT SUM(r1.change_money*10) INTO sumPoints FROM realwar_tool.play_money_pay_log  r1 WHERE r1.username = userNames;

IF (sumPoints IS NULL) THEN

SELECT 0 INTO sumPoints FROM DUAL;

END IF;

/*今日花费军饷或消费券*/

SELECT SUM(t1.price) INTO dayCost  FROM realwar.t_consumption t1 WHERE t1.userName = userNames  AND YEAR(STR_TO_DATE(t1.consumDate,'%Y-%m-%d %H:%i:%s')) = YEAR(SYSDATE())

AND MONTH(STR_TO_DATE(t1.consumDate,'%Y-%m-%d %H:%i:%s')) = MONTH(SYSDATE()) AND DATE(STR_TO_DATE(t1.consumDate,'%Y-%m-%d %H:%i:%s')) = DATE(SYSDATE());

IF (dayCost IS NULL) THEN

SELECT 0 INTO dayCost FROM DUAL;

END IF;

/*用户总花费军饷或消费券*/

SELECT SUM(t2.price) INTO sumCost FROM realwar.t_consumption t2 WHERE t2.userName = userNames;

IF (sumCost IS NULL) THEN

SELECT 0 INTO sumCost FROM DUAL;

END IF;

/*今日滞留*/

IF(dayPay!=0) THEN

SELECT FLOOR((dayPay-dayCost)/dayPay*100) INTO dayRemainRats FROM DUAL;

ELSE

SELECT 0 INTO dayRemainRats FROM DUAL;

END IF;

/*总滞留*/

IF(sumPoints!=0)THEN

SELECT FLOOR((sumPoints-sumCost)/sumPoints*100) INTO sumRemainRats FROM DUAL;

ELSE

SELECT 0 INTO sumRemainRats FROM DUAL;

END IF;

/*将得到的值,循环的插入到临时表中*/

INSERT INTO temp_remainsPoints SET userName1=userNames,nickName1= nickName,sumPoints1= sumPoints,

remainPoints1= (sumPoints-sumCost),dayPay1 = dayPay,dayCost1= dayCost,dayRemainRats1 = dayRemainRats,sumRemainRats1= sumRemainRats;

FETCH usernameCur INTO userNames;/*循环游标,给userName赋值*/

END WHILE;

/*end loop;*/

CLOSE usernameCur;

/*返回的结果集*/

SELECT userName1,nickName1,sumPoints1,remainPoints1,dayPay1,dayCost1,dayRemainRats1,sumRemainRats1

FROM temp_remainsPoints;

END$$

DELIMITER ;