Re: GiST: PickSplit and multi-attr indexes

Neil Conway <neilc@samurai.com> writes:
> If I understand the code correctly, GiST will only pass the first 
> attribute of each index tuple to the user-defined PickSplit method when 
> it wants to split a node. (see circa line 1269 of gist.c)

> Is this a wise design decision?

It's probably just a hangover from the days when GiST didn't support
multi-column indexes at all.  I agree it should be changed.  But note
you will then have to cope with NULL values.
        regards, tom lane