如果任何更新不成功,如何回滚？

Question

我写了一个像以下的交易:

    BEGIN TRAN

    UPDATE  [Table1]
    SET [Name] = 'abcd'
    WHERE   [ID] = 1

    UPDATE  [Table2]
    SET [Product] = 'efgh'
    WHERE   [ID] = 10

    UPDATE  [Table3]
    SET [Customar] = 'ijkl'
    WHERE   [ID] = 11

现在我想要回滚,如果任何UPDATE不成功.例如,在Table2中,如果没有ID = 10的Product,则应回滚事务.怎么做？请注意我正在使用SQLServer 2000.

Answer 1

SQL Server 2000.如果使用SET XACT_ABORT ON,则不需要回滚

SET XACT_ABORT ON --to ensure rollback
BEGIN TRAN -- @@TRANCOUNT + 1

UPDATE  [Table1]
SET [Name] = 'abcd'
WHERE   [ID] = 1
IF @@ROWCOUNT = 0 ROLLBACK TRAN

IF @@TRANCOUNT > 0
BEGIN
    UPDATE  [Table2]
    SET [Product] = 'efgh'
    WHERE   [ID] = 10

    IF @@ROWCOUNT = 0 ROLLBACK TRAN
END

IF @@TRANCOUNT > 0
BEGIN
    UPDATE  [Table3]
    SET [Customar] = 'ijkl'
    WHERE   [ID] = 11

    IF @@ROWCOUNT = 0 ROLLBACK TRAN
END

IF @@TRANCOUNT > 0 COMMIT TRAN