> We could imagine doing something like CHECK ONLY (foo), but that seems
> quite non-orthogonal with (a) everything else in CREATE TABLE, and
> (b) ALTER TABLE ONLY.
>
>
Yeah, I thought about CHECK ONLY support as part of table definition, but as
you say - it appears to be too non-standard right now and we can always go
back to this later if the need be felt.
Regards,
Nikhils