Re: Sensible and NonsenSQL Aspects of the NoSQL Hoopla
From: Jan Hidders <hidders_at_gmail.com>
Date: Wed, 4 Sep 2013 18:35:36 +0200
Message-ID: <52276158$0$1697$e4fe514c_at_dreader35.news.xs4all.nl>
> ...
>
>
> If it's a bad copy, maybe it's not a copy at all. Are you saying that
> Codd deliberately copied the theory and deliberately chose to not
> acknowledge it?
Date: Wed, 4 Sep 2013 18:35:36 +0200
Message-ID: <52276158$0$1697$e4fe514c_at_dreader35.news.xs4all.nl>
On 2013-09-03 19:46:22 +0000, Eric said:
>> Dana utorak, 3. rujna 2013. 06:02:38 UTC+2, korisnik James K. Lowden >> napisao je:
> ...
>
>> What Codd did not do that is that he did not say that he copied Gottlob >> Frege. The Relational Model is copy of Frege's theory. And this is a bad >> copy, because Codd did not understand completely Frege's theory.
>
> If it's a bad copy, maybe it's not a copy at all. Are you saying that
> Codd deliberately copied the theory and deliberately chose to not
> acknowledge it?
Codd explicitly referred to first-order logic in his work, so the link with Frege was clearly made. A reference to Tarski would have been nice, though. :-) The clear link notwithstanding, the relational model cannot be meaningfully described or thought of as a copy of FOL, either bad or good, since it has a very different purpose and makes entirely different claims about its purpose and utility. To confuse the two is misunderstanding entirely what database theory and database models are about.
- Jan Hidders