Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> I'm still wondering if we can get away without a catalog change on that
> - e.g. could we look up an array type by looking for a pg_type entry
> containing the base type's oid in the typelem field? Or would that be
> too slow?
(a) too slow, (b) not unique.
regards, tom lane