我创建了一个存储过程.在执行某些操作后,我想声明游标并从该游标获取数据.但是,它给出了语法错误.下面是我的存储过程
DELIMITER $$
USE `adserver`$$
DROP PROCEDURE IF EXISTS `getDaypartTimeDetail`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `getDaypartTimeDetail`(currentDate DATE,noOfdays INT,cityId BIGINT)
BEGIN
DECLARE TotalFiles, TotalDuration BIGINT;
DECLARE i INT;
DECLARE da DATE;
DECLARE dateCnt INT;
SET dateCnt = 0;
SET TotalFiles = 0;
SET TotalDuration = 0;
DROP TEMPORARY TABLE IF EXISTS tmp_date;
DROP TEMPORARY TABLE IF EXISTS temp_data;
CREATE TEMPORARY TABLE tmp_date(dday DATE);
CREATE TEMPORARY TABLE temp_data(dday DATE,daypartId INT,totalFile BIGINT,totalDur BIGINT);
WHILE(dateCnt < noOfdays) DO
SET i = 1;
INSERT INTO tmp_date(dday) VALUES (DATE_ADD(currentDate, INTERVAL dateCnt DAY));
SET dateCnt = dateCnt + 1;
END WHILE;
DECLARE exit_flag INT DEFAULT 0; ****<-- Gives error****
DECLARE dday DATE;
DECLARE dId BIGINT;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET exit_flag = 1;
DECLARE cur CURSOR FOR SELECT dday, id FROM tmp_date, daypart;
OPEN cur;
all_details_id:LOOP
FETCH cur INTO dday,dId;
IF record_not_found THEN
LEAVE all_details_id;
END IF;
INSERT INTO temp_data(dday,daypartId) VALUES (dday,dId);
END LOOP all_details_id;
CLOSE cur;
SELECT * FROM temp_data;
END$$
DELIMITER ;
最佳答案 MySQL中存在(非常奇怪的)规则,即在任何SET,INSERT等语句之前,DECLARE语句应该在BEGIN之后.请参阅这篇文章
http://rpbouman.blogspot.com/2005/10/nesting-mysql-cursor-loops.html
因此,您的脚本应如下所示:
DELIMITER $$
USE `adserver`$$
DROP PROCEDURE IF EXISTS `getDaypartTimeDetail`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `getDaypartTimeDetail`(currentDate DATE,noOfdays INT,cityId BIGINT)
BEGIN
DECLARE TotalFiles, TotalDuration BIGINT;
DECLARE i INT;
DECLARE da DATE;
DECLARE dateCnt INT;
DECLARE exit_flag INT DEFAULT 0; ****<-- Gives error****
DECLARE dday DATE;
DECLARE dId BIGINT;
DECLARE cur CURSOR FOR SELECT dday, id FROM tmp_date, daypart;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET exit_flag = 1;
SET dateCnt = 0;
SET TotalFiles = 0;
SET TotalDuration = 0;
DROP TEMPORARY TABLE IF EXISTS tmp_date;
DROP TEMPORARY TABLE IF EXISTS temp_data;
CREATE TEMPORARY TABLE tmp_date(dday DATE);
CREATE TEMPORARY TABLE temp_data(dday DATE,daypartId INT,totalFile BIGINT,totalDur BIGINT);
WHILE(dateCnt < noOfdays) DO
SET i = 1;
INSERT INTO tmp_date(dday) VALUES (DATE_ADD(currentDate, INTERVAL dateCnt DAY));
SET dateCnt = dateCnt + 1;
END WHILE;
OPEN cur;
all_details_id:LOOP
FETCH cur INTO dday,dId;
IF record_not_found THEN
LEAVE all_details_id;
END IF;
INSERT INTO temp_data(dday,daypartId) VALUES (dday,dId);
END LOOP all_details_id;
CLOSE cur;
SELECT * FROM temp_data;
END$$
DELIMITER ;
希望这可以帮助…