Douglas Doole <dougdoole@gmail.com> writes:
> For min, you should be able to pre-filter =, < , and <=. In all cases the
> pre-filter would be <=. For max it would be =, > , >= becoming >=.
Doesn't really seem worth the trouble to me, given that those are pretty
unselective filter conditions. If you could push down an = then it might
be worth doing ...
regards, tom lane