>> [...some definitions...]
>
> Never leave out the "unimportant" stuff --- that's usually where you
> went wrong ;-)
OK, I've attached below the SQL I use to generate stuff and an
interactive session with the "explain" etc. The table has 40000 rows,
I do a VACUUM before doing a select, and (what I really don't
understand) the "explain verbose" doesn't mention anything about an index.
> My guess is that you didn't supply a restriction selectivity estimator
> for the ~>= operator.
I'm using contsel and contjoinsel, which I pulled from the rtree_gist
example.
Anyway, hoping you can help...