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Re: modeling, validating and documenting an xml grammar

• To: xml-dev@l...
• Subject: Re: modeling, validating and documenting an xml grammar
• From: ari@c... (K. Ari Krupnikov)
• Date: 18 Jun 2003 12:31:55 -0700
• In-reply-to: <15725CF6AFE2F34DB8A5B4770B7334EE022DC442@h...>
• References: <15725CF6AFE2F34DB8A5B4770B7334EE022DC442@h...>
• Sender: ari@l...
• User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

"Bullard, Claude L (Len)" <clbullar@i...> writes:

> I seldom see fully-normalized 
> databases because the overhead of getting and 
> opening tables, creating the view, etc. can be 
> prohibitive vs the maintenance of denormalized 
> data.  Otherwise, I would agree.  These aren't 
> legacy databases.  They are practical ones where 
> performance considerations dominate maintenance.

I seldom see databases denormalized because of credible performance
considerations. Most of the time it's because the DBA or the users
can't deal with so much abstraction - different parts of a relation
being in different tables - or can't be bothered to write client code
to reassemble hierarchical structures from the results of a JOIN.

Ari.

• References:
  • RE: modeling, validating and documenting an xml grammar
    • From: "Bullard, Claude L (Len)" <clbullar@i...>

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