Re: dbdebunk 'Quote of Week' comment

From: x <x_at_not-exists.org>
Date: Tue, 30 Aug 2005 10:34:05 +0300
Message-ID: <df125i$ero$1_at_domitilla.aioe.org>


http://www.dbdebunk.com/page/page/622757.htm

http://docs.hp.com/en/32650-90386/ch04s02.html

"Gene Wirchenko" <genew_at_ucantrade.com.NOTHERE> wrote in message news:fcr6h15tdd96ik63vtvqpmkvc5mnfe7bvv_at_4ax.com...
> On Fri, 19 Aug 2005 12:47:41 +0300, "x" <x_at_not-exists.org> wrote:
>
> [snip]
>
> >The quote does not mention if the key is generated by the DBMS or by the
> >application.
> >It only say that it has no meaning for the end user.
> >
> >This means that there must be a one to one mapping between the generated
key
> >and some key with a meaning for the end user. Therefore that meaningless
> >primary key is a pointer. But one of the goals of the relational model is
to
>
> No. It is a key value. Unless it states where the data is
> located (as in storage medium location (i.e. address)), it is not a
> pointer.
>
> >eliminate pointers from the data model.
>
> "pointers" not "keys".
>
> [snip]
>
> Sincerely,
>
> Gene Wirchenko
>
Received on Tue Aug 30 2005 - 09:34:05 CEST

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