sql-server - 通过严重性<20的链接服务器捕获错误

Question

我有一个与此问题类似的问题:TRY CATCH with Linked Server in SQL Server 2005 Not Working

我正在运行这个try catch:

    Declare @command nvarchar(100)
    SET @command = 'SELECT column FROM table'
    BEGIN TRY
        BEGIN TRY
            exec ' + @Server_Name + @DB_name + '.dbo.sp_executesql @command
    END TRY
    BEGIN CATCH
        PRINT EXCEPTION
    END CATCH

我认为我不能使用RAISEERROR，因为我没有运行自己的存储过程，而是仅运行了一个简单的select语句。我尝试使用@@ERROR，但在链接的服务器上也无法使用。因为我得到的错误小于20，所以我遇到了这个问题:

If a remote stored procedure calls RAISERROR with severity less than 20 and the remote stored procedure is scoped within a TRY block on the local server, RAISERROR does not cause control to pass to the CATCH block of the TRY…CATCH construct

http://msdn.microsoft.com/en-us/library/ms191515.aspx

我发现了这个问题:How to capture error message returned from linked server?也没有得到回答。

Answer 1

我通过将try catch传递到链接服务器并使用OUTPUT参数找回错误来找到解决方法。例如:

SET @command = '
BEGIN TRY
    exec (''select * from xxx'') 
    SELECT @resultOUT = @@ERROR
END TRY
BEGIN CATCH
    SELECT @resultOUT = @@ERROR
END CATCH'
SET @ParmDefinition = N'@resultOUT nvarchar(5) OUTPUT'
exec my_linked_server.sp_executesql 
    @command, 
    @ParmDefinition, 
    @resultOUT=@result OUTPUT