Question

我有一个我正在通过C＃执行事务调用的sproc：

using (var dbContext = PowerToolsDatabase.GetDataContext())
{
    dbContext.Connection.Open();
    using (dbContext.Transaction = dbContext.Connection.BeginTransaction(System.Data.IsolationLevel.Serializable))
    { 
        foreach (var element in package.AddOrUpdateElements)
        {
            dbContext.usp_Element_Commit( /* args */);
        }

        dbContext.Transaction.Commit();
    }
}

在那个sproc中有一个try catch，以及在某些情况下执行的try部分中的RAISERROR

BEGIN TRY
    BEGIN TRANSACTION   
    SET TRANSACTION ISOLATION LEVEL SERIALIZABLE

    -- Perform Name Uniqueness check (for new)
    IF EXISTS ( SELECT PK.identifier --... )
    BEGIN

        RAISERROR(60000, 16, 1, 'dbo.usp_Element_Commit', 'Supplied Element Name (for new Element) already exists')

        RETURN

    END

    -- Do stuff         

    COMMIT TRANSACTION
END TRY
BEGIN CATCH

    IF XACT_STATE() <> 0
    BEGIN
        ROLLBACK TRANSACTION;
    END

    DECLARE @ErrorMessage NVARCHAR(4000);
    DECLARE @ErrorSeverity INT;
    DECLARE @ErrorState INT;

    SELECT
        @ErrorMessage = 'dbo.usp_Element_Commit -- ' + ERROR_MESSAGE(),
        @ErrorSeverity = ERROR_SEVERITY(),
        @ErrorState = ERROR_STATE();

    RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);

END CATCH;

当我运行它并在sproc的try部分内点击RAISERROR时，我得到以下多个错误：

dbo.usp_Element_Commit -- Supplied Element Name (for new Element) already exists
Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements. Previous count = 1, current count = 0.
Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements. Previous count = 1, current count = 0.

在不弄乱外部事务的情况下，建议的处理错误并跳转到catch块的方法是什么？

此外，如果我从sproc中的catch块中删除回滚，那么我得到相同的Transaction Count消息，其中Previous Count = 1，current count = 2

Answer 1

我使用保存点或事务将我的sproc更改为follow this pattern，具体取决于是否已有现有事务。它现在按预期工作。

BEGIN TRY
    declare @trancount int = @@trancount
    if @trancount = 0
        begin transaction
    else
        save transaction usp_element_commit_transaction;

    set transaction isolation level serializable

    -- Perform Name Uniqueness check (for new)
    IF EXISTS ( SELECT PK.identifier --... )
    BEGIN

        RAISERROR(60000, 16, 1, 'dbo.usp_Element_Commit', 'Supplied Element Name (for new Element) already exists')

        RETURN

    END

    -- Do stuff         

    COMMIT TRANSACTION
END TRY
BEGIN CATCH

    declare @xstate int = xact_state()
    if @xstate = -1
        rollback
    else if @xstate = 1 and @trancount = 0
        rollback
    else if @xstate = 1 and @trancount > 0
        rollback transaction usp_element_commit_transaction;

    DECLARE @ErrorMessage NVARCHAR(4000);
    DECLARE @ErrorSeverity INT;
    DECLARE @ErrorState INT;

    SELECT
        @ErrorMessage = 'dbo.usp_Element_Commit -- ' + ERROR_MESSAGE(),
        @ErrorSeverity = ERROR_SEVERITY(),
        @ErrorState = ERROR_STATE();

    RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);

END CATCH;

TSQL尝试捕获事务错误处理，事务计数不匹配

1 个答案: