sql - 在事务中更新表(使用 Service Broker 的审计触发器)

Question

我们已经使用服务代理实现了审计功能，并在需要审计的表上实现了触发器。我们面临的问题是当我们尝试从事务中更新可审计表时，它会抛出错误 -

The current transaction cannot be committed and cannot support operations that write to the log file. Roll back the transaction.

但是，如果我们从可审核表中删除触发器，一切都会正常进行。不可能在事务中更新表(带触发器)，还是我们在最后遗漏了什么？

更新交易

BEGIN TRAN
    update  ActivationKey set OrderLineTransactionId = @orderLineTransactionId, LastUpdated = getUtcdate(), [Status] =2  
    where   PurchaseTransactionId = @transactionid 
        -- Rollback the transaction if there were any errors
            IF @@ERROR <> 0 
                ROLLBACK
            ELSE        
                COMMIT TRAN
END TRAN                

触发器

ALTER TRIGGER [dbo].[ActivationKey_AuditTrigger]
     ON  [dbo].[ActivationKey]
    AFTER INSERT, UPDATE, DELETE 
    AS
    BEGIN
        SET NOCOUNT ON;

        DECLARE @auditBody XML
        Declare @newData nvarchar(MAX)
        DECLARE @DMLType CHAR(1)    
        -- after delete statement
        IF NOT EXISTS (SELECT * FROM inserted)
        BEGIN   
            SELECT  @auditBody = (select * FROM deleted AS t FOR XML AUTO, ELEMENTS),
                    @DMLType = 'D'
        END 
        -- after update or insert statement
        ELSE
        BEGIN
                --after Update Statement
            IF EXISTS (SELECT * FROM deleted)
              begin
                    SELECT      @auditBody = (select * FROM deleted AS t FOR XML AUTO, ELEMENTS)
                    SELECT      @newData = (select * FROM Inserted AS t FOR XML AUTO, ELEMENTS)
                    SELECT      @DMLType = 'U'
              end
              ELSE -- after insert statement
              begin
                    SELECT      @auditBody = (select * FROM inserted AS t FOR XML AUTO, ELEMENTS)
                    SELECT      @DMLType = 'I'
              end
        END

        -- get table name dynamicaly but
        DECLARE @tableName sysname 
        SELECT  @tableName = 'ActivationKey'

        SELECT @auditBody = 
            '<AuditMsg>
                <SourceDb>' + DB_NAME() + '</SourceDb>
                <SourceTable>' + @tableName + '</SourceTable>
                <UserId>' + SUSER_SNAME() + '</UserId>
                <DMLType>' + @DMLType + '</DMLType>
                <ChangedData>' + CAST(@auditBody AS NVARCHAR(MAX)) + '</ChangedData>
                <NewData>' + isnull(@newData,'') + '</NewData>
            </AuditMsg>'
        -- Audit data asynchrounously
        EXEC dbo.procAuditSendData @auditBody
    END 

从触发器中调用的存储过程 (procAuditSendData)

ALTER PROCEDURE [dbo].[procAuditSendData]

( @AuditedData XML)作为开始 开始尝试 声明@dlgId UNIQUEIDENTIFIER，@dlgIdExists BIT 选择@dlgIdExists = 1

    SELECT  @dlgId = DialogId
    FROM    vwAuditDialogs AD 
    WHERE   AD.DbId = DB_ID()
    IF  @dlgId IS NULL
    BEGIN 
        SELECT @dlgIdExists = 0
    END

    -- Begin the dialog, either with existing or new Id
    BEGIN DIALOG @dlgId
        FROM SERVICE    [//Audit/DataSender]                                               
        TO SERVICE      '//Audit/DataWriter', 
                'BAAEA6F1-C97E-4884-8651-2829A2049C46'
        ON CONTRACT     [//Audit/Contract]
    WITH ENCRYPTION = OFF;

    -- add our db's dialog to AuditDialogs table if it doesn't exist yet
    IF @dlgIdExists = 0
    BEGIN 
        INSERT INTO vwAuditDialogs(DbId, DialogId)
        SELECT  DB_ID(), @dlgId
    END
    --SELECT @AuditedData

    -- Send our data to be audited
    ;SEND ON CONVERSATION @dlgId    
    MESSAGE TYPE [//Audit/Message] (@AuditedData)
END TRY
BEGIN CATCH
    INSERT INTO AuditErrors (
            ErrorProcedure, ErrorLine, ErrorNumber, ErrorMessage, 
            ErrorSeverity, ErrorState, AuditedData)
    SELECT  ERROR_PROCEDURE(), ERROR_LINE(), ERROR_NUMBER(), ERROR_MESSAGE(), 
            ERROR_SEVERITY(), ERROR_STATE(), @AuditedData
END CATCH

结束

Answer 1

在发出 ROLLBACK TRANSACTION 之后，您仍然可以访问 ERROR_PROCEDURE() 等函数，这是您需要在 CATCH block 中执行的操作。查看 Using TRY...CATCH in Transact SQL 中的示例，尤其是看“错误处理示例”中的代码。它调用来记录错误的过程 (uspLogError) 在其上方出现了几个示例:

BEGIN CATCH
    -- Call procedure to print error information.
    EXECUTE dbo.uspPrintError;

    -- Roll back any active or uncommittable transactions before
    -- inserting information in the ErrorLog.
    IF XACT_STATE() <> 0
    BEGIN
        ROLLBACK TRANSACTION;
    END

    EXECUTE dbo.uspLogError @ErrorLogID = @ErrorLogID OUTPUT;
END CATCH; 

---

至于潜在的错误是什么(目前在您的错误报告中出错)，如果我不得不猜测那将是您的消息的契约(Contract)无法处理 XML 中出现的多行数据。但我们需要查看契约(Contract)以确认这一点。