Re: A pk is *both* a physical and a logical object.
From: Lennart <erik.lennart.jonsson_at_gmail.com>
Date: Thu, 12 Jul 2007 16:17:35 +0200
Message-ID: <f75d60$125$1_at_registered.motzarella.org>
Date: Thu, 12 Jul 2007 16:17:35 +0200
Message-ID: <f75d60$125$1_at_registered.motzarella.org>
Jan Hidders wrote:
[...]
> To answer the question, I think that is quite simple. As defined in
> the relational model it is a logical concept. As far as I know the SQL
> standard does not state that a PK implies an index (but I could be
> wrong)
I think you are right. Indexes are not even part of core sql, so it seems highly unlikely that it is stated that a PK should imply an index.
/Lennart
[...] Received on Thu Jul 12 2007 - 16:17:35 CEST