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Re: Sql to Relational Algebra

From: Roy Hann <rhann_at_globalnet.co.uk>
Date: Mon, 21 Jul 2003 23:19:20 +0000 (UTC)
Message-ID: <bfhsdn$a9t$1@sparta.btinternet.com>


"Bob Badour" <bbadour_at_golden.net> wrote in message news:23VSa.1120$qy3.189016155_at_mantis.golden.net...  <snip>
>
> > Bob's statement is not entirely incorrect though.
>
> My statement was not incorrect in any way, shape or form. [snip]

True enough. In my eagerness I expressed myself very carelessly. Please forgive me.

I was eager to highlight the fact that Ingres only ever briefly translated SQL to QUEL and that this was represented as a "lack of native SQL support", which was a devastating marketing tool in the hands of the vendors of competing products. While your purpose in recalling it seems to have been positive, the technique of translating SQL to QUEL proved very negative for Ingres in the marketplace. The taint lingered for many years, and for all I know it continues to linger. It is a touchy subject amongst those of use who think that Ingres has been very badly treated over the years.

> The point in my earlier post was not about Ingres but was an answer to a
> question regarding the advantages of translating SQL to a direct
> representation of the relational algebra.

So I gathered. And the point in my post was to emphasize that Ingres no longer works the way described and alluded to. I don't think that has any bearing on your point one way or the other. It is simply an update on the current state of play for anyone who might be interested.

Once again, I do apologize for my sloppiness.

Roy Hann (rhann at rationalcommerce dot com) Rational Commerce Ltd.
www.rationalcommerce.com
"Ingres development, tuning, and training experts" Received on Mon Jul 21 2003 - 18:19:20 CDT

Original text of this message

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