Slow query on remote server

Question

Hi
I am running a query as below;
INSERT INTO tblEvents( <fields list> )
SELECT <fields list>
FROM OPENROWSET('SQLNCLI', 'Server=<ip address>;DATABASE=MyDB;Uid=sa;Pwd=MyPassword;', 'SELECT * FROM tblEvents') AS a
WHERE (ID = 68596)
Problem is that below part of query runs very slow (takes around 3 mins to complete) even though it just needs to bring one row.
SELECT <fields list>
FROM OPENROWSET('SQLNCLI', 'Server=<ip address>;DATABASE=MyDB;Uid=sa;Pwd=MyPassword;', 'SELECT * FROM tblEvents') AS a
WHERE (ID = 68596)
What is the problem and how can I speed it up?
Thanks
Regards

Answer 1

Hi,
as Ronen already mentioned, the syntax you are using will not push anything from the confition down the provider stack to the data source, it will pull the whole data and the filter it on the client side. (where you execute the query).
You can either use the syntax that Ronen already pointed out OR use a linked Server along with the existing provider for SQL Server. In most cases the provider is able to push down the conditions to the data source, have it executes here and then bring back
only the relevant rows. This depends on the query you are using and the ability of the driver to translate the conditions.
See more on creating linked servers here:
http://msdn.microsoft.com/en-us/library/aa560998.aspx
-Jens
Jens K. Suessmeyer
http://blogs.msdn.com/Jenss