elein <elein(at)varlena(dot)com> writes:
> I've got a domain based on a text type.
> I've overridden the equal operator with
> lower(text) = lower(text).
This won't work, you need to make a type instead.
> If this is the way domains really are, I would strongly suggest
> expanding create domain to merge with create type (under) and
> allow us to list the basic functions.
IMHO, the exact difference between a domain and a type is you get to
choose your own definitions of the basic operations on a type. There's
no free lunch: as soon as you start substituting operations the
complexity involved goes up by an order of magnitude.
regards, tom lane