Date: Thu, 7 Jul 2005 10:26:56 +0200
In article <AyVye.138732$g63.7370802_at_phobos.telenet-ops.be>,
> >>Note btw. that if user-defined functions are restricted to the
> >>domains (their input and output types are only domains) then you cannot
> >>define such an operation as a user-defined function.
> > Let me try to define such an operator.
> > unnest_string takes a relation IN and an attribute name A as arguments,
> > returns a relation OUT. The type of attribute A in IN is character
> > string.
> Ah, but now you are using the domain or relations, right? There is a
> problem with that domain. It doesn't exist. The collection of all
> relations is a proper class, and not a set, but domains have to be sets.
Be that as it may, what is the problem?
-- JonReceived on Thu Jul 07 2005 - 10:26:56 CEST