"Tim Jones" <TJones@xxxxxxxxx> writes: > I have a query that uses an IN clause and it seems in perform great > when there is more than two values in it but if there is only one it is > really slow. Also if I change the query to use an = instead of IN in the > case of only one value it is still slow. Please provide EXPLAIN ANALYZE output for both cases. > Possibly I need to reindex this > particular index? More likely you need to ANALYZE the table so that the planner has up-to-date stats ... regards, tom lane