Re: [Gnue-dev] Object-Relational Mapping

[Daniel E Baumann]

The "line" is in the implementation. Anyway, how does posting a paper
about how to map objects to a relational database have anything to do
with an OODBMS? Whether you look at appserver or the "version" in
_featuretest you're going to have to tackle this issue (and it is
dealt with in varying degrees right now).

Dan

On Thu, Jan 16, 2003 at 03:26:59PM -0600, Jason Cater wrote:
> There's a fine line between bridging two worlds, and trying to emulate an 
> OODBMS. 
> 
> -- Jason 
> 
> On Thursday 16 January 2003 03:23 pm, Daniel E Baumann wrote:
> > On Thu, Jan 16, 2003 at 02:30:43PM -0600, Jason Cater wrote:
> > > Since we are sharing articles that have bookmarked, here is an article
> > > from a respected relational theorist and practicioner:
> > >
> > > http://searchdatabase.techtarget.com/tip/1,289483,sid13_gci769023,00.html
> > >?FromTaxonomy=%2Fpr%2F284872 (entitled "OO for application development,
> > > not database management")
> > >
> > > He is affiliated with Codd (the originator of Relational database theory
> > > in the '70s) and Date (also helped pioneer relational databases.)
> > >
> > > These guys resumes go well beyond academic theorizing (is that a word :)
> > >
> > > One interesting point that I read place after place is that the integrity
> > > guarantees offered by relational database theory is based on solid
> > > mathematical principles -- OODBMS are not; they are just built on
> > > supposed market forces.  And relational data models are only as limited
> > > in functionality as you make them -- there's nothing that can be done in
> > > an OODBMS-paradigm than in a properly designed relational one... however
> > > I'd venture to say that the converse of that statement is not true.  Just
> > > food for thought.
> > >
> > > Well, that's my link for the day :)
> > >
> > > -- Jason
> >
> > Well the article that I have linked is NOT about creating an OODBMS,
> > also the ODMG standard isn't about that either, imho. Relational
> > databases have a true data model, but what some ppl would like is to
> > not have to worry about doing data modeling but have the middleware
> > map the objects for them, i.e., an object-relational layer. The
> > article that I linked discusses 3 ways and their pros and cons. He
> > says that any middleware you write should implement all 3 and you
> > should be able to choose which method you want to use given the type
> > of application you are developing taking into account the underlying
> > circumstances. This is not an object v. relational war or something,
> > but a way to bridge the worlds together.
> >
> > Dan
> 

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