Gregory Stark <gsstark@mit.edu> writes:
> I imagine you've thought of this already but just in case, the cost of the
> function call has to be combined with the selectivity to get this right. If
> you can do an expensive but very selective clause first and save 100 cheap
> calls that almost always return true it may still be worthwhile.
I've thought of it, but I haven't figured out a reasonable algorithm for
ordering the clauses in view of that. Have you?
regards, tom lane