This is probably better on -performance, and is certainly a FAQ. But. . . On Wed, Feb 23, 2005 at 03:01:52PM +0100, Thomas Braad Toft wrote: > > Table device contains 5285 rows, tmeevent contains 834912 rows. ^^^^ ^^^^^^
> -> Seq Scan on tmeevent (cost=0.00..23606.12 rows=834912 width=138) > (actual time=0.04..2193.97 rows=834912 loops=1) ^^^^^^ > -> Seq Scan on device (cost=0.00..564.85 rows=5285 width=29) (actual > time=0.04..25.07 rows=5285 loops=1) ^^^^ > Why isn't the planner using my indexes? I tried making them as both rtree Because there's no advantage to using an index when you are fetching 100% of both tables. This is the most efficient plan. Of course, it's an open question whether you want to get 100% of both tables. But that's what you're doing, and using the index would be more expoensive than this. A -- Andrew Sullivan | [EMAIL PROTECTED] Information security isn't a technological problem. It's an economics problem. --Bruce Schneier ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq