How to check if SQL Server exists before executing the code

I am using the following code to dynamically create a linked server
:

 select @tsql =	'use [master];
					EXEC master.dbo.sp_addlinkedserver @server = N'''+@pservername+''', @srvproduct=N''sql server'';
					EXEC master.dbo.sp_serveroption @server=N'''+ @pservername+''', @optname=N''data access'', @optvalue=N''true'';
					EXEC master.dbo.sp_serveroption @server=N'''+ @pservername+''', @optname=N''rpc'', @optvalue=N''true'';
					EXEC master.dbo.sp_serveroption @server=N'''+ @pservername+''', @optname=N''rpc out'', @optvalue=N''true'';
					EXEC master.dbo.sp_serveroption @server=N'''+ @pservername+''', @optname=N''use remote collation'', @optvalue=N''true'';
					EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname = N''' + @pservername+ ''', @locallogin = null , @useself = N''true'';'    

--print @tsql
IF @PrintFlag = 0 PRINT @tsql
ELSE   exec (@tsql)    

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When a server does not exists I get the following error:

"OLE DB provider "SQLNCLI" for linked server "SERVER03" returned  message "Login timeout expired". "
LVL 35
YZlatAsked:
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Aneesh RetnakaranDatabase AdministratorCommented:
you can use this

select * from master..sysservers where srvname = 'YourLinkedServerName'
0
YZlatAuthor Commented:
That's not what I meant. let's say I need to create a linked server from SERVER01 to SERVER03. SERVER03 was deleted. So executing sp_addlinkedserver would give an error.

How do I avoid that?
0
Aneesh RetnakaranDatabase AdministratorCommented:
from SQL server 2005 onwards you can call sp_testLinkedServer

http://technet.microsoft.com/en-us/library/ms189809(v=sql.90).aspx

otherwise just run a query against master database on your linked server, if it errors out, link is offline
0

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Microsoft SQL Server

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