Question

我习惯于在MS SQL中工作，并且正在努力让mySql存储过程正常工作！

我知道有数据可以提取，但没有任何回报。

DELIMITER //
/*  Author: Jessie Brown     
    Date:   8/17/13 
    Notes:  Template Creation

    Comments: Comments created in the header area will NOT be stored in the database write
              Comments created AFTer the begin statement will be retained within the database write
*/

-- checks to see if stored procedure exists
-- if exists the procedure is dropped and recreated

DROP PROCEDURE IF EXISTS `reportLogExceptions`//

-- Creates new procedure

CREATE PROCEDURE reportLogExceptions (IN logId varchar(50),
    IN groupId varchar(50),
    IN fromDate varchar (50),
    IN toDate varchar(50))

  BEGIN
      /*
        report name: Log Exceptions
        Test Query: CALL reportLogExceptions('1','1','1378385650','1378472050')
      --------------------------------------------------------------------------
        Declare variables*/

      DECLARE logInS varchar(50);
      DECLARE groupIdS varchar (50);

    /*
      Sets the variables to use for the SELECT query
    */
      CASE
        WHEN logInS = '-1' THEN
        SET logInS = ''%'';
         ELSE SET logInS = logInS;
      END CASE;

      CASE
        WHEN groupIdS = '-1' THEN
        SET groupIdS = ''%'';
          Else SET groupIdS = groupIdS;   END Case;

  SELECT g.groupId,g.name AS groupName,l.logId,l.name AS logName, i.itemID,
      i.name AS itemName, le.userName,completed, i.optimalMin,i.optimalMax ,value
  FROM groups g
      JOIN LOGS l ON g.groupID = l.groupId
      JOIN logExceptions le ON l.logID = le.logID
      JOIN items i ON l.logId = i.logId
  WHERE  l.logID LIKE logInS
      AND g.groupID LIKE groupIdS 
      AND le.completed
        BETWEEN FROM_UNIXTIME(fromDate / 1000)
        AND FROM_UNIXTIME (toDate / 1000);
  END//

DELIMITER ;

调用我正在使用的存储过程

CALL reportLogExceptions('-1','-1','    1359676800','1362095999')

Answer 1

一方面，CASE语句中的逻辑无效。

您可以分别将logId和groupId与自己进行比较，而不是引用输入参数logInS和groupIdS。因此，您总是将NULL s作为这些变量中的值。

这是显示

的 SQLFiddle 演示

你很可能有这个

SET logInS   = CASE logId   WHEN '-1' THEN '%' ELSE logId END;
SET groupIdS = CASE groupId WHEN '-1' THEN '%' ELSE groupId END;

这是 SQLFiddle 演示。

您对所有参数使用VARCHAR的选择似乎也很奇怪。使用适当的数据类型（例如INT为logId，groupId和DATETIME，TIMESTAMP或INT为fromDate和{{toDate 1}}取决于logExceptions.completed列使用的数据类型。

mySql存储过程不返回数据

1 个答案: