Emre Hasegeli <emre@hasegeli.com> writes:
> I am not sure if we are covering the case when clause_const and
> pred_const are both NULL. In this case, we should be able to return
> true only by checking op_strict(pred_op) or maybe even without
> checking that. Am I mistaken?
Yeah, that's there. We need both operators to be strict, I think;
otherwise we can't really assume anything about what they'd return
for NULL inputs. But if they are, we have NULL => NULL which is
valid for all proof cases.
regards, tom lane
