On mið, 2006-12-27 at 11:02 -0600, postgresql.org@xxxxxxxxx wrote: > > I was referring to the situation where one has this in a WHERE clause: > > ((vConstant IS NULL) OR (Table.IndexedCol = vConstant)) > > where vConstant is a *constant* parameter in a pl/pgsql function. Reguardless of the issue whether pl/pgsql could be expected to optimize this case, I find it difficult to imagine a scenario where this kind of coding makes sense. I understand that in some cases on would like to do this with a *variable* to simplify logic, but what possible gain can be had from doing this with a constant, other that obfuscation? It does not make sense to spend CPU-time on optimizing a case that is not useful or common. gnari
