Path: utzoo!yunexus!geac!daveb
From: daveb@geac.UUCP (David Collier-Brown)
Newsgroups: comp.databases
Subject: Re: Informix 4GL Question?
Keywords: Informix 4GL, SQL, Relational theory
Message-ID: <2436@geac.UUCP>
Date: 11 Mar 88 18:35:47 GMT
Article-I.D.: geac.2436
Posted: Fri Mar 11 13:35:47 1988
References: <714@uel.uel.co.uk> <2314@geac.UUCP> <1169@ucsfcca.ucsf.edu> <2390@geac.UUCP> <1180@ucsfcca.ucsf.edu>
Reply-To: daveb@geac.UUCP (David Collier-Brown)
Organization: The Geac Block-Cursor Department.
Lines: 39


>In article <2390@geac.UUCP> daveb@geac.UUCP (David Collier-Brown) writes:
>>
>>  That's what I was hoping to discover.  Relational theory excludes
>>significant consideration of certain uses of the data which it
>>describes.  And that is a prefectly reasonable thing for it to do:
>>it is concerned with the nature and organization of data, not ad-hoc
>>manipulations such as the ones I raised.
>
In article <1180@ucsfcca.ucsf.edu> brianc@daedalus.UUCP (Brian Colfer) writes:
>  See my followup with CURSORS.

  Seen and appreciated, thanks. (other people made equivalent
suggestions).

	Side comment: someone on the net is forwarding
	latest-message-first... I keep getting things sorted
	by descending date. End of side comment.

>   a good database model.  I think that the relational model is clearly
>   a good model.  I don't see this as advocating kludges rather it is 
>   building on sound theory and research with a modular approach.
[...]  The foundation of the relational model is sound.   It is
>based on predicate calculus which has a long and established history.

  Yes, I agree predicate calculus is effective and surprisingly
descriptive:
  (A x | x is a woman (E w | w is work (w belongs to x -> w is undone))

  What is the next logical tool? The one which can describe cursors.
(I admit to having forgotten enough that I have trouble reading my
copy of Copi).

 --daveb
-- 
 David Collier-Brown.                 {mnetor yunexus utgpu}!geac!daveb
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