Re: MV Keys
From: Jon Heggland <heggland_at_idi.ntnu.no>
Date: Fri, 3 Mar 2006 16:40:46 +0100
Message-ID: <MPG.1e7281e5aec20ae7989784_at_news.ntnu.no>
Date: Fri, 3 Mar 2006 16:40:46 +0100
Message-ID: <MPG.1e7281e5aec20ae7989784_at_news.ntnu.no>
In article <1141387926.092588.82100_at_v46g2000cwv.googlegroups.com>,
jog_at_cs.nott.ac.uk says...
> A crucial point is that this is only true if the system offers a
> mechanism to perform the decomposition. If it does not, then to the
> system itself your compound datatype is a single value.
Why is this crucial?
> This is the reason that nested relations is a valid approach within
> traditional RM - a compound datatype with a mechanism for its
> manipulation.
That doesn't make sense to me. Compound attributes are valid if the system can decompose them, and if the system can't decompose them, they're not compound?
-- JonReceived on Fri Mar 03 2006 - 16:40:46 CET