mysql 游标类型
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 ;