Re: Modeling question...
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Fri, 14 Nov 2008 13:51:02 -0400
Message-ID: <491dba8a$0$5458$9a566e8b_at_news.aliant.net>
>
> Possibly I mis-represented him - I think he probably mentioned "data
> independence", meaning that I should implement such things in a way that
> the user wouldn't be aware of them, say with views. Not sure because
> his thinking was a little deeper than mine.
Date: Fri, 14 Nov 2008 13:51:02 -0400
Message-ID: <491dba8a$0$5458$9a566e8b_at_news.aliant.net>
paul c wrote:
> paul c wrote:
> ...
>
>> I would say indirection is under-exploited in practice (even though >> Fabian Pascal once told me I was wrong to think of it as an option in >> logical dbms design). ... >> So maybe we were at cross-purposes. ...
>
> Possibly I mis-represented him - I think he probably mentioned "data
> independence", meaning that I should implement such things in a way that
> the user wouldn't be aware of them, say with views. Not sure because
> his thinking was a little deeper than mine.
You were talking about physical performance. Thus, the key concept is not logical independence via views but physical independence via whatever structures the dbms has available to physically store various representations of the data. Received on Fri Nov 14 2008 - 18:51:02 CET