交易不会回滚

问题描述

我有以下交易。如果点的总和不等于4000，我希望它回滚，如果它的积分是COMMIT，则它要回滚。我执行了交易，积分不等于4000。但是仍然执行了交易。为什么呢？

BEGIN TRAN [Whist]

BEGIN TRY

 END TRY

  BEGIN CATCH

IF (SELECT SUM(Point) FROM dbo.Players) <> 4000 

      ROLLBACK TRANSACTION [Whist]

  END CATCH

IF (SELECT SUM(Point) FROM dbo.Players) = 4000 

COMMIT TRAN

解决方法

请以2种方式运行此SQL。 @sum_of_points设置为4000后，将提交事务。第二次将@sum_of_points设置为4001，这将回滚事务。

BEGIN TRAN
BEGIN TRY
    declare @sum_of_points          int=4000;

    IF (@sum_of_points <> 4000)
        throw 50000,'Not equals 4000 so do not commit the transaction',1;
    commit transaction;
    print ('transaction was committed')
END TRY
BEGIN CATCH
     ROLLBACK TRANSACTION
     print ('transaction has been rolled back');
END CATCH