在链接服务器上运行存储过程（链接服务器名称作为参数）

Question

I'm trying to execute code against linked server which is coming from a parameter. Below is my code. However I get an error:

'Could not find server 'P_LINKED_SERVER'.

How does one execute against server which is coming from a parameter?

DECLARE @P_LINKED_SERVER AS VARCHAR(30)

SET @LINKED_SERVER = (SELECT DSS_PARAMETER_VALUE FROM [DBO].DSS_PARAMETER WHERE DSS_PARAMETER_NAME = 'Server Name')
DECLARE @sql AS VARCHAR(max)

SET @sql = 'SQL CODE'

EXEC (@sql) AT [@P_LINKED_SERVER];

Many Thanks

Answer 1

The linked server name has to be part of the complete statement and cannot be a parameter. So:

DECLARE @P_LINKED_SERVER AS VARCHAR(30);

SELECT @LINKED_SERVER = DSS_PARAMETER_VALUE
FROM [DBO].DSS_PARAMETER
WHERE DSS_PARAMETER_NAME = 'Server Name';

DECLARE @sql AS NVARCHAR(max);

SET @sql = CONCAT('EXEC SQL CODE AT ', @LINKED_SERVER);

EXEC(@sql);

In your case, you seem to want:

SET @sql = CONCAT('EXEC ''DELETE FROM tablename'' AT ', @LINKED_SERVER);