Try contrib/btree_gist. I've tried that one, but for my case it didn't help much. The performance was almost equal or even slower than built-in btree. On Fri, 17 Mar 2006 08:53:44 -0700 Dan Harris <fbsd@xxxxxxxxxxxxxxx> wrote: > Dan Harris wrote: > > Markus Bertheau wrote: > >> Have you tried using a GIST index on lat & long? These things are > >> meant for two-dimensional data, whereas btree doesn't handle > >> two-dimensional data that well. How many rows satisfy either of the > >> long / lat condition? > >> > >> > >>> > > According to the analyze, less than 500 rows matched. I'll look into > > GIST indexes, thanks for the feedback. > > > > -Dan > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 2: Don't 'kill -9' the postmaster > > When I try to create a GIST index, I get the following error: > > create index eventgeo_lat_idx on eventgeo using GIST (lat); > > ERROR: data type double precision has no default operator class for > access method "gist" > HINT: You must specify an operator class for the index or define a > default operator class for the data type. > > I'm not sure what a "default operator class" is, exactly.. > > -Dan > > ---------------------------(end of broadcast)--------------------------- > TIP 5: don't forget to increase your free space map settings > -- Evgeny Gridasov Software Engineer I-Free, Russia
