Re: Object databases beat joins (was: Re: ODMG Website?)
Date: Sat, 17 May 2003 23:39:48 GMT
Message-ID: <8Lzxa.9157$rt6.4234_at_sccrnsc02>
"Carl Rosenberger" <carl_at_db4o.com> wrote in message news:ba5sji$vih$00$1_at_news.t-online.com...
> For those of you (Adrian) arguing that a relational database can
> also implement foreign keys as pointers:
> In this case you are violating the no.1 relational principle that
> values (the logical representation) should be independant of the
> physical representation.
You correctly state the principle, but it doesn't support what you're saying. If the logical representation is independent of the physical representation, then the psysical representation is free to work however it likes. That means it's okay for the implementation to use pointers, even though pointers are not part of the logical model.
Marshall Received on Sun May 18 2003 - 01:39:48 CEST