執行準備聲明MySQL不工作

Question

我一直在試圖確定我在MySQL中創建的存儲過程有什麼問題。我在創建它時沒有任何問題，但在我試圖調用它時卻不起作用。 Workbench顯示的錯誤是

錯誤代碼：1064.您的SQL語法錯誤;檢查 手冊對應到你的MySQL服務器版本正確的語法 在 線4

使用近「選擇ApplicantID，姓，名，中間」這裏是我的存儲過程，

-- -------------------------------------------------------------------------------- 
-- Routine DDL 
-- Note: comments before and after the routine body will not be stored by the server 
-- -------------------------------------------------------------------------------- 
DELIMITER $$ 

CREATE DEFINER=`pinpoint_kevin`@`%` PROCEDURE `usp_Processing_GetApplicantByJobPostIDandStatus`(
    IN _ApplicationStatus VARCHAR(100), 
    IN _JobPostID VARCHAR(64), 
    IN _startRowIndex INT, 
    IN _maximumRows INT, 
    IN _Order NVARCHAR(20)) 
BEGIN 
    DECLARE _OuterSelectString VARCHAR(1000); 
    DECLARE _OuterFromString1 VARCHAR(1000); 
    DECLARE _OuterFromString2 VARCHAR(1000); 
    DECLARE _InnerSelectString VARCHAR(2000); 
    DECLARE _InnerFromString VARCHAR(1000); 
    DECLARE _InnerWhereString VARCHAR(1000); 
    DECLARE _InnerOrderByString VARCHAR(1000); 
    DECLARE _OuterWhereString VARCHAR(1000); 
    DECLARE _ProcessingStepID VARCHAR(64); 
    DECLARE _ApplicationProcessingID VARCHAR(64); 
    DECLARE _YEHEY TEXT; 

    SELECT 
     ProcessingStepID 
    INTO 
     _ProcessingStepID 
    FROM 
     ProcessingStep 
    WHERE 
     ProcessingStepName = _ApplicationStatus; 

    SELECT 
     ApplicationProcessingID 
    INTO 
     _ApplicationProcessingID 
    FROM 
     ApplicationProcessing AS AP 
      INNER JOIN 
     ProcessingStep AS PS ON AP.ProcessingStepID = PS.ProcessingStepID 
    WHERE 
     PS.ProcessingStepName = _ApplicationStatus 
    ORDER BY 
     AP.TransactionDate 
    LIMIT 
     1; 

    SET 
     _OuterSelectString = ' 
           SET 
            @row_num = 0; 

           SELECT 
            ApplicantID, 
            LastName, 
            FirstName, 
            MiddleName, 
            Email, 
            ContactNumber, 
            ApplicantCount, 
            ApplicationNumber, 
            ResumeStatus, 
            LastTransactionDate, 
            MovedBy, 
            StepType, 
            AdministeredBy, 
            Evaluation, 
            Recommendation, 
            DateTaken, 
            Mark, 
            RowRank 
          '; 
    SET 
     _OuterFromString1 = 'FROM (
          '; 

    SET 
     _InnerSelectString = 'SELECT 
           (SELECT 
            COUNT(*) 
           FROM 
            Applicant_2 AS App 
             INNER JOIN 
            ApplicantJobPost AS AJP ON App.ApplicantID = AJP.ApplicantID 
             INNER JOIN 
            ApplicationStatus AS APPS ON AJP.ApplicationStatusID = APPS.ApplicationStatusID 
           WHERE 
            APPS.ApplicationStatusName = ? 
             AND 
            AJP.JobPostId = ? AND AJP.IsForwarded = 0) AS ApplicantCount, 
            App.ApplicantID AS ApplicantID, 
            App.LastName AS LastName, 
            App.FirstName AS FirstName, 
            App.MiddleName AS MiddleName, 
            App.Email AS Email, 
            App.BirthDate AS BirthDate, 
            App.Address AS Address, 
            App.ContactNumber AS ContactNumber, 
            App.FileName AS FileName, 
            App.FileExtension AS FileExtension, 
            App.DateCreated AS DateCreated, 
            AJP.ApplicationNumber AS ApplicationNumber, 
            AJP.IsReadResume AS ResumeStatus, 
            AP.TransactionDate AS LastTransactionDate, 
            AP.MovedBy AS MovedBy, 
            AP.ProcessingStepType AS StepType, 
            AP.AdministeredBy AS AdministeredBy, 
            AP.Evaluation AS Evaluation, 
            AP.Recommendation AS Recommendation, 
            AP.DateTaken AS DateTaken, 
            AJP.Mark AS Mark, 
            @row_num := @row_num + 1 AS RowRank 
            '; 

    SET 
     _InnerFromString = 'FROM 
           Applicant_2 AS App 
            INNER JOIN 
           ApplicantJobPost AS AJP ON App.ApplicantID = AJP.ApplicantID 
            INNER JOIN 
           ApplicationStatus AS APPS ON AJP.ApplicationStatusID = APPS.ApplicationStatusID 
            INNER JOIN 
           ApplicationProcessing AS AP ON AP.ApplicantJobPostID = AJP.ApplicantJobPostID 
          '; 

    SET 
     _InnerWhereString = 'WHERE 
           APPS.ApplicationStatusName = ? 
            AND 
           AJP.JobPostId = ? 
            AND 
           AP.ProcessingStepID = ? 
            AND 
           AJP.IsForwarded = 0 
          '; 

    IF (_ApplicationStatus = 'Exam' OR _ApplicationStatus = 'Interview') 
    THEN 
     SET _InnerWhereString = 'WHERE 
           APPS.ApplicationStatusName = ? 
            AND 
           AJP.JobPostId = ? 
            AND 
           AP.ProcessingStepID = ? 
            AND 
           AJP.IsForwarded = 0 
            AND 
           AP.ApplicationProcessingID = ? '; 
    END IF; 

    SET 
     _OuterFromString2 = ') AS WithRowNumbers 
          '; 

    SET 
     _OuterWhereString = 'WHERE 
           RowRank > _startRowIndex AND RowRank <= (_startRowIndex + _maximumRows) 
          '; 

    IF (_Order = 'Transaction') 
    THEN 
     SET 
      _InnerOrderByString = 'ORDER BY 
             AP.TransactionDate, 
             LastName, 
             IsReadResume, 
             Mark, 
             DateTaken DESC 
            '; 

    ELSEIF (_Order = 'TransactionDesc') 
    THEN 
     SET 
      _InnerOrderByString = 'ORDER BY 
             AP.TransactionDate DESC, 
             LastName, 
             IsReadResume, 
             Mark, 
             DateTaken DESC 
            '; 

    ELSEIF (_Order = 'Last NameDesc') 
    THEN 
     SET 
      _InnerOrderByString = 'ORDER BY 
             LastName DESC, 
             IsReadResume, 
             Mark, 
             AP.TransactionDate DESC, 
             DateTaken DESC 
            '; 

    ELSEIF (_Order = 'Last Name') 
    THEN 
     SET 
      _InnerOrderByString = 'ORDER BY 
             LastName, 
             IsReadResume, 
             Mark, 
             AP.TransactionDate DESC, 
             DateTaken DESC 
            '; 

    ELSEIF (_Order = 'Resume StatusDesc') 
    THEN 
     SET 
      _InnerOrderByString = 'ORDER BY 
             IsReadResume DESC, 
             Mark, 
             AP.TransactionDate DESC, 
             LastName, 
             DateTaken DESC 
            '; 

    ELSEIF (_Order = 'Resume Status') 
    THEN 
     SET 
      _InnerOrderByString = 'ORDER BY 
             IsReadResume, 
             Mark, 
             AP.TransactionDate DESC, 
             LastName, 
             DateTaken DESC 
            '; 
    END IF; 

    SET _YEHEY = CONCAT(_OuterSelectString, _OuterFromString1, _InnerSelectString, _InnerFromString, _InnerWhereString, _OuterFromString2, _OuterWhereString); 
    SET @WholeQuery = _YEHEY; 
    PREPARE statement FROM @WholeQuery; 
    SET @a = _ApplicationStatus; 
    SET @b = _JobPostID; 
    SET @c = _ApplicationStatus; 
    SET @d = _JobPostID; 
    SET @e = _ProcessingStepID; 

    IF (_ApplicationStatus = 'Exam' OR _ApplicationStatus = 'Interview') 
    THEN 
     SET @f = _ApplicationProcessingID; 
     EXECUTE statement USING @a, @b, @c, @d, @e, @f; 

    ELSE 
     EXECUTE statement USING @a, @b, @c, @d, @e; 
    END IF; 

    DEALLOCATE PREPARE statement; 

    SELECT _YEHEY; 
    SELECT @WholeQuery; 

END 

我已經嘗試複製結果字符串/查詢，並在另一個窗口中運行它，並替換適當的變量值，它的工作。

我被這個存儲過程卡住了。我希望你能幫助我。謝謝！

Answer 1

作爲SQL Syntax for Prepared Statements下記載：準備語句不支持多語句

SQL語法（即，由分隔的單個串中的多個語句「;」字符）。