ROLLBACK TRANSACTION 請求沒有對應的 BEGIN TRANSACTION

Question

我已經嘗試將 COMMIT TRAN 放入 if else 循環中，但我仍然收到此錯誤。

我要在一個class中招收一個學生，如果招收后座位數為負數，我必須將其反轉並打印一條消息說不能招收。 我已經放置了其他錯誤消息，只是為了查看事務是如何工作的。

CREATE PROCEDURE dbo.EnrollStudent ( @CourseID  AS INTEGER,
                                     @StudentID AS VARCHAR(20) ) AS
BEGIN
   DECLARE @StatusID INTEGER
   DECLARE @Status VARCHAR(50)
   DECLARE @CurrentSeats INTEGER
   DECLARE @ErrorCode INTEGER
   SET @StatusID=0



      IF EXISTS (SELECT 1 
                    FROM dbo.CourseEnrollment 
                    WHERE dbo.CourseEnrollment.CourseId=@CourseID AND dbo.CourseEnrollment.StudentId=@StudentID )
        BEGIN

         BEGIN TRAN Tr1
         SET @StatusID = 1
         SELECT @ErrorCode=@@ERROR
         IF (@ErrorCode<>0) GOTO OTHERPROBLEM
         ELSE 
         COMMIT TRAN Tr1

        END


     IF EXISTS ( SELECT 1
                    FROM dbo.CourseEnrollment
                    FULL OUTER JOIN dbo.Courses
                    ON dbo.Courses.CourseId=@CourseID     
                    WHERE dbo.CourseEnrollment.StudentId<>@StudentID  AND dbo.Courses.Faculty IS NULL ) 
            BEGIN
            BEGIN TRAN Tr2
                SET @StatusID=2
                SELECT @ErrorCode=@@ERROR
                 IF (@ErrorCode<>0) GOTO OTHERPROBLEM2
                 ELSE
                 COMMIT TRAN Tr2

                 END



    IF @StatusID=0
    BEGIN
        IF EXISTS ( SELECT 1
                    FROM dbo.Courses    
                    WHERE dbo.Courses.CourseId=@CourseID AND dbo.Courses.Faculty IS NOT NULL )

                BEGIN


                BEGIN TRAN Tr3

                SET @StatusID=3


                BEGIN TRAN InsertingValues
                INSERT INTO dbo.CourseEnrollment (dbo.CourseEnrollment.StudentId,dbo.CourseEnrollment.CourseId)
                                                VALUES          (@StudentID,@CourseID);

                SELECT @ErrorCode=@@ERROR
                 IF (@ErrorCode<>0) GOTO InsertProblem
                 ELSE
                 COMMIT TRAN InsertingValues




                BEGIN TRAN UpdateCourses
                UPDATE dbo.Courses  
                    SET OpenSeats = OpenSeats-1 
                       WHERE dbo.Courses.CourseId = @CourseID

                SELECT @ErrorCode=@@ERROR
                 IF (@ErrorCode<>0) GOTO UpdateProblem
                 ELSE
                 COMMIT TRAN UpdateCourses




                SELECT @CurrentSeats=OpenSeats  
                    FROM dbo.Courses
                        WHERE dbo.Courses.CourseId = @CourseID

                        IF (@CurrentSeats<0) GOTO PROBLEM
                        ELSE
                        COMMIT TRAN Tr3


                END

    END



    OTHERPROBLEM:
         BEGIN
            PRINT 'Unable to set status'
            ROLLBACK TRAN
         END


    OTHERPROBLEM2:
                 BEGIN
                     PRINT 'Unable to set status'
                     ROLLBACK TRAN
                 END


     UpdateProblem:
                 BEGIN
                     PRINT 'Not able to update values'
                     ROLLBACK TRAN InsertingValues
                 END



    InsertProblem:
                 BEGIN
                     PRINT 'Not able to insert'
                     ROLLBACK TRAN InsertingValues
                 END



    PROBLEM:
                BEGIN
                    PRINT 'Seats Full!'
                    ROLLBACK TRAN
                END




     IF @StatusID = 1
        BEGIN  
         SET @Status = 'The Student is already enrolled'
        END;

     ELSE IF @StatusID = 2
         BEGIN 
            SET @Status = 'Cannot enroll until faculty is selected' 
         END

     ELSE IF @StatusID = 3
         BEGIN 
            SET @Status = 'Student Enrolled' 
        END

   SELECT @Status

END;

這正確地更新了表，但給出了以下錯誤：

(1 row(s) affected)

(1 row(s) affected)
Unable to set status
Msg 3903, Level 16, State 1, Procedure EnrollStudent, Line 101
The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.
Unable to set status
Msg 3903, Level 16, State 1, Procedure EnrollStudent, Line 108
The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.
Not able to update values
Msg 3903, Level 16, State 1, Procedure EnrollStudent, Line 115
The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.
Not able to insert
Msg 3903, Level 16, State 1, Procedure EnrollStudent, Line 123
The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.
Seats Full!
Msg 3903, Level 16, State 1, Procedure EnrollStudent, Line 131
The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.

(1 row(s) affected)

Answer 1

您獲得的錯誤是因為您在沒有打開事務的情況下回滾（您已經提交或回滾）。 考慮清理存儲過程的結構，嘗試將整個存儲過程作為一個事務執行，然后在發生錯誤時回滾。 您還可以通過檢查事務是否已打開來測試是否需要回滾：

BEGIN TRANSACTION;
BEGIN TRY

   --execute all your stored proc code here and then commit
   COMMIT;

END TRY
BEGIN CATCH

   --if an exception occurs execute your rollback, also test that you have had some successful transactions
   IF @@TRANCOUNT > 0 ROLLBACK;  

END CATCH

Answer 2

如果已命名，則需要指定要回滾的事務名稱。 從那開始。

在那之后你可以告訴我們交易失敗了（確保它之前沒有提交交易）。

BEGIN TRAN Tr1

-- your code 

ROLLBACK TRAN Tr1

Answer 3

快速查看 - 可能是因為您在啟動它時命名了事務（Tr1），但沒有在錯誤處理程序中引用該名稱？

Answer 4

DECLARE @Error varchar(max)        
SET @Error = ''        

BEGIN TRY        

 INSERT INTO OPERACION(CONTRATOID,FLUJO,MONTO,ID_ORIGINAL,ID_TRX,ESTADO,TIPO,REFERENCIA,        
 US_CREA,US_ACT,FEC_CRE,REQUEST,RESPONSE)        
 VALUES(@P_CONTRATOID,@P_FLUJO,@P_MONTO,@P_ID_ORIGINAL,@P_ID_TRX,@P_ESTADO,        
 @P_TIPO,@P_REFERENCIA,@P_US_CREA,@P_US_ACT,getdate(),@P_REQUEST,@P_RESPONSE)        

END TRY        
BEGIN CATCH        
 SELECT @Error = 'err: '+ ERROR_MESSAGE()      

 ROLLBACK ;  
END CATCH        

SELECT @Error 

Answer 5

在我的例子中，我使用 pyodbc 訪問 SQL 服務器。 即使是簡單的“SELECT * from table”也會導致“ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION”之類的錯誤。

原來是權限相關的。

Answer 6

IF @FailureCount = 0 
                    BEGIN
                         IF @@TRANCOUNT > 0  
                        BEGIN
                            COMMIT TRAN a
                        END
                    END
                ELSE
                    BEGIN
                     IF @@TRANCOUNT > 0  
                        BEGIN
                            ROLLBACK TRAN a
                        END
                    END