Gianvito Pio <pio(dot)gianvito(at)gmail(dot)com> writes:
> I just want to ask you if it's possible to define sub types in PostgreSQL
> (Type inheritance). I found that table inheritance is possible...but I'd
> like to do it on types.
It's fairly unclear what your actual requirements are here, but perhaps
domains would do the job?
regards, tom lane