Vince Vielhaber <vev(at)michvhf(dot)com> writes:
> If this:
> alter table foobar add column address varchar(50) default 'none';
> is the incorrect syntax, why does it not fail or at least give a
> warning?
Because it's incompletely implemented: the parser takes the full syntax
but the ALTER TABLE routine doesn't do everything it should.
regards, tom lane