当本地数据库上没有-S参数时,SQL命令中的BCP给出NativeError = 2

Question

我在SQL中有这个命令:

DECLARE @cmd NVARCHAR(4000)
DECLARE @pathAndFileName NVARCHAR(MAX)
DECLARE @result INT
SET @pathAndFileName = 'C:\Temp\file.csv'
SET @cmd = 'bcp "SELECT TOP 1 * FROM SomeDB.dbo.SomeTable" queryout "'
  + @pathAndFileName + '" -w -T -t; '       
EXEC @result = xp_cmdshell @cmd 
SELECT @result

并输出:

SQLState = 08001, NativeError = 2 Error = [Microsoft][SQL Server Native Client 11.0]Named Pipes Provider: Could not open a connection to SQL Server [2]. 
SQLState = 08001, NativeError = 2 Error = [Microsoft][SQL Server Native Client 11.0]A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online. 
SQLState = S1T00, NativeError = 0 Error = [Microsoft][SQL Server Native Client 11.0]Login timeout expired

@result 是1

它只有在我添加带服务器名称和数据库名称的-S参数时才有效(如下所示-S "MYCOMPUTERNAME\DBINSTANCENAME").

但是,当我在远程服务器上尝试这个时,这没有-S参数.

如何设置我的本地数据库,所以我不再需要-S了？

Answer 1

如果你省略-S然后它将尝试默认的localhost未命名实例:

-S server_name[ \instance_name]
指定要连接的SQL Server实例.如果未指定服务器,则bcp实用程序将连接到本地计算机上的SQL Server的默认实例.

在您的示例中,您似乎确实有一个实例名称,因此无法连接w/o显式指定-S.此外,如果您采取额外的步骤明确指定-S参数,您的代码将始终更易于移植并且更容易进行故障排除.使用SERVERPROPERTY(MachineName)并SERVERPROPERTY(InstanceName)确保代码可识别群集.