On Fri, Apr 08, 2005 at 23:40:28 -0400, Tom Lane <> wrote:
> Bruno Wolff III <> writes:
> > It should be possible to make this work for bool_and and bool_or as those
> > are equivalent to min and max for the boolean type.
> This would just be a matter of marking them properly in the catalogs.
> However, are they really equivalent in the corner cases? In particular,
> I think boolean AND across zero input rows is probably supposed to
> return TRUE, not NULL.
I am not sure what the spec says, but according to how the seem to work,
the answer appears to be that they are equivalent.
area=> select bool_and(true) where false;bool_and
area=> select bool_or(true) where false;bool_or