Re: Do we want a hashset type?

On Sun, Jun 18, 2023, at 18:45, Andrew Dunstan wrote:
> . It might be worth sending a version number with the send function
> (c.f. jsonb_send / jsonb_recv). That way would would not be tied forever
> to some wire representation.

Great idea; implemented.

> . I think there are some important set operations missing: most notably
> intersection, slightly less importantly asymmetric and symmetric
> difference. I have no idea how easy these would be to add, but even for
> your stated use I should have thought set intersection would be useful
> ("Who is a member of both this set of friends and that set of friends?").

Another great idea; implemented.

> . While supporting int4 only is OK for now, I think we would at least
> want to support int8, and probably UUID since a number of systems I know
> of use that as an object identifier.

I agree that's probably the most logical thing to focus on next. I'm on it.

New patch attached.

/Joel