Re: Normalize until neat, Automate until Complete
From: Kenneth Downs <firstinit.lastname_at_lastnameplusfam.net>
Date: Thu, 25 Nov 2004 21:29:38 -0500
Message-ID: <i1hi72-b6p.ln1_at_pluto.downsfam.net>
>
> I once evaluated a product called Versata, which takes the so called
> Business Rules approach. In fact, it was actually based on derived,
> or calculated columns. You could decide whether to materialize them
> or not. Deriving and/or updating them was handled by the "Business
> Rules" engine but the applications were using these columns as if they
> actually existed in the database.
>
> There is an IBM Red Book that describes the product. See e.g.
>
> http://www.redbooks.ibm.com/redbooks/pdfs/sg246510.pdf
>
> Best Regards,
> Lauri Pietarinen
Date: Thu, 25 Nov 2004 21:29:38 -0500
Message-ID: <i1hi72-b6p.ln1_at_pluto.downsfam.net>
Lauri Pietarinen wrote:
> Kenneth Downs <firstinit.lastname_at_lastnameplusfam.net> wrote in message
> news:<pmvf72-di5.ln1_at_pluto.downsfam.net>...
>> >> I would suppose I mean a system of primitive operations that can be used >> to compose data of arbitrary complexity which will follow predictable >> behaviors. I would assume the picking those primitives would take some >> thought, as opposed to simply saying, "hey, we have a speed problem on >> the >> gonkulator report, better materialize the commonly derived columns!" >> This approach, while being pretty realistic, offers no guidance or advice >> on how >> to avoid the problem in the future. Worse, the suggestion that these >> hard working folk will "normalize till it hurts" tends to guarantee they >> will get into trouble again and again. >>
>
> I once evaluated a product called Versata, which takes the so called
> Business Rules approach. In fact, it was actually based on derived,
> or calculated columns. You could decide whether to materialize them
> or not. Deriving and/or updating them was handled by the "Business
> Rules" engine but the applications were using these columns as if they
> actually existed in the database.
>
> There is an IBM Red Book that describes the product. See e.g.
>
> http://www.redbooks.ibm.com/redbooks/pdfs/sg246510.pdf
>
> Best Regards,
> Lauri Pietarinen
Thank you!
-- Kenneth Downs <?php $sig_block="Variable scope? What's that?";?>Received on Fri Nov 26 2004 - 03:29:38 CET