mysql：while循环后声明游标

我创建了一个存储过程。在执行一些操作后，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mysql：while循环后声明游标

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 ;

来源

2012-08-02 vishal

什么错误？ – Madhivanan 2012-08-02 12:29:06

@Madhivanan语法错误 – vishal 2012-08-02 12:35:00

我正在使用sqlyog – vishal 2012-08-02 12:35:24

有在MySQL（很奇怪）规则，它说，DECLARE报表应BEGIN后马上去之前任何SET，INSERT等语句。请参考本文http://rpbouman.blogspot.com/2005/10/nesting-mysql-cursor-loops.html

所以，你的脚本看起来应该像下面这样：

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 ;

希望这有助于...

来源

2013-05-24 14:48:58 Yura

mysql：while循环后声明游标

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