SQL Server Linked DB Query creates multiple connections
Posted on 2013-11-22
I created a linked server in SQL 2008 to an external DB without any issues. However, each time I run a query against this DB, there seem to be multiple connections to the DB it's linking to. For example, I ran a simple SELECT col1 FROM LINKTEST..SYSTEM.table
and there were two connections made to the external DB server.
Looking at the logging from the other server it looks like it first does a SELECT * from SYSTEM.table and then actually runs SELECT col1 FROM LINKTEST.SYSTEM.table
Is this to be expected? It seems like each time I add a table to the query I get two more processes on the external DB.