Florian Pflug <fgp@phlo.org> writes:
> I'm currently thinking the best way forward is to get a basic patch
> without any NUMERIC stuff committed, and to revisit this after that's done.
+1. I liked Robert's suggestion that the "fast" aggregates be implemented
as a contrib module rather than directly in core, too. If we do that then
it's perfectly reasonable to handle that as a separate patch.
regards, tom lane