Tom,
> I think you are leaping to conclusions about why there's a speed
> difference. Or maybe I'm too dumb to see how an index could be used
> to speed these min/max operations --- but I don't see that one would
> be useful. Certainly not an index on treeno alone. Would you care to
> explain exactly how it's done?
If I knew that, I'd have proposed a patch already, yes?
I'm working on it.
--
Josh Berkus
Aglio Database Solutions
San Francisco