Re: Lucid statement of the MV vs RM position?
From: Jon Heggland <jon.heggland_at_idi.ntnu.no>
Date: Tue, 09 May 2006 13:30:37 +0200
Message-ID: <e3puku$msr$1_at_orkan.itea.ntnu.no>
Date: Tue, 09 May 2006 13:30:37 +0200
Message-ID: <e3puku$msr$1_at_orkan.itea.ntnu.no>
David Cressey wrote:
>> I don't dispute that; please pay attention. I'm saying that SUMMARIZE is
>> not an aggregate operator; in particular, it is not SUM. SUMMARIZE
>> produces a relation; SUM produces a number. Is your point that you
>> actually want to use the same name for these two operations? Why?
>
> I don't understand why an aggregate operator could not produce a relation.
I didn't say it couldn't. In fact, I have mentioned at least one that
does. SUM does not, however. SUM is iterated addition; addition does not
apply to relations.
--
Jon
Received on Tue May 09 2006 - 13:30:37 CEST