From: Chris Bitmead <chris@bitmead.com>
To: Hannu Krosing <hannu@tm.ee>
Cc: Chris Bitmead <chrisb@nimrod.itg.telstra.com.au>
Cc: PostgreSQL Development <pgsql-hackers@postgresql.org>
Subject: Re: Thus spoke SQL3 (on OO)
Date: Tue, 23 May 2000 05:44:41 +1000
Message-ID: <39298E29.16B280CC@bitmead.com> (raw)
References: <Pine.LNX.4.21.0005201507330.423-100000@localhost.localdomain>
<00052104000003.14806@comptechnews>
<392830DA.B5546EF7@bitmead.com>
<00052108053904.14806@comptechnews>
<39286B3F.F4594E40@bitmead.com>
<39283008.ED83E94@tm.ee>
<39287873.D023D7E5@nimrod.itg.telecom.com.au>
<3928F01B.B0C6D563@tm.ee>
Hannu Krosing wrote:
>
> Chris Bitmead wrote:
> >
> > Hannu Krosing wrote:
> >
> > > Chris, what is your position on having a single primary key for all
> > > inherited columns ?
> >
> > What is the significance of a primary key compared to any old unique
> > key?
>
> I don't know ;) Some theorists seem to think it important, and PG allows
> only one PK per table.
>
> I just meant that primary key (as well as any other uniqe key) should be
> inherited from parent table
What object theory would say is that oid uniquely identifies an object.
Other unique keys should usually be inherited.
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To: pgsql-hackers@postgresql.org
Cc: chris@bitmead.com, hannu@tm.ee, chrisb@nimrod.itg.telstra.com.au
Subject: Re: Thus spoke SQL3 (on OO)
In-Reply-To: <39298E29.16B280CC@bitmead.com>
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