"Christopher Kings-Lynne" <chriskl(at)familyhealth(dot)com(dot)au> writes:
> As far as I am aware, we don't even support using ALTER TABLE ADD CONSRAINT
> to add a NOT NULL constraint, so I have no idea why the ERROR: message tells
> people to do that!!!
Not directly, but you can add a CHECK(foo NOT NULL) constraint.
regards, tom lane