Matthew <matthew(at)flymine(dot)org> writes:
>> This sounds like something an R-tree can do.
> I *know* that. However, Postgres (as far as I can see) doesn't provide a
> simple R-tree index that will index two integers. This means I have to
> write one myself. I'm asking whether it is possible to get two values into
> a GiST index, which would allow me to implement this.
Have you looked at contrib/seg/ ?
regards, tom lane