"Johann 'Myrkraverk' Oskarsson" <johann(at)myrkraverk(dot)com> writes:
> I meant ALTER TYPE. Adding the send and recv functions doesn't seem
> to supported by ALTER TYPE.
> Is there a workaround for this?
You could manually update the pg_type row, and then if you were
being fussy, add pg_depend entries showing the type depends on
the functions.
regards, tom lane