EXEC sp_testlinkedserver over multiple Linked Servers - sql

Question

I'm trying to get error messages over all my Linked Servers.
So I've three Linked Servers:
IT_DATA
193.0.1
Monitoring_Data
I know that executing the following query I will get the info that I need to one Linked Server:
BEGIN TRY
EXEC sp_testlinkedserver N'193.0.1';
EXEC sp_executesql N'SELECT * FROM OPENQUERY([193.0.1], ''SELECT 1 AS c;'');';
END TRY
BEGIN CATCH
SELECT ERROR_NUMBER(), ERROR_MESSAGE();
END CATCH;
PRINT 'We got past the Catch block!';
But I'm trying to create a loop to exec the SP to all of my Linked Servers:
DECLARE #Linked_Server varchar(50)
SET #Linked_Server = '193.0.1'
BEGIN TRY
EXEC sp_testlinkedserver N'193.0.1';
EXEC sp_executesql N'SELECT * FROM OPENQUERY([193.0.1], ''SELECT 1 AS c;'');';
END TRY
BEGIN CATCH
SELECT ERROR_NUMBER(), ERROR_MESSAGE();
END CATCH;
PRINT 'We got past the Catch block!';
But I don't know how can I create a loop to get the information of all the Linked Servers into one table.
Anyone have an closer example?
Thanks!

Answer 1

I don't like using cursors but in this case... Try this:
create table dbo.LinkedServer (
LSName nvarchar(128)
, ErrorNumber int
, ErrorMessage nvarchar(4000)
);
DECLARE #Linked_Server nvarchar(128)
, #SQLString nvarchar(max);
declare crsLinkedServers cursor
for
select
s.name
from sys.servers s
where s.is_linked = 1;
open crsLinkedServers;
fetch next from crsLinkedServers
into #Linked_Server;
while ##fetch_status = 0
begin
BEGIN try
set #SQLString = N'SELECT * FROM OPENQUERY([' + #Linked_Server + '], ''SELECT 1 AS c;'');'
EXEC sp_testlinkedserver #Linked_Server;
EXEC sp_executesql #SQLString;
END TRY
BEGIN catch
insert into dbo.LinkedServer (LSName, ErrorNumber, ErrorMessage)
SELECT #Linked_Server, error_number(), error_message();
END CATCH;
fetch next from crsLinkedServers
into #Linked_Server;
end
close crsLinkedServers;
deallocate crsLinkedServers;
select
*
from dbo.LinkedServer;
drop table dbo.LinkedServer;