[ALL] let's think about Query Language for 2.0

[Ruslan Zasukhin]

on 5/21/03 3:08 AM, john roberts at jarobe01 at athena.louisville.edu wrote:

>> I'm a little confused about point 4.2 -- does this have to do with
>> support for models other than relational?
>> 
> I took 4.2 to deal with intervals, end points of the intervals and
> complements of intervals. Some simple examples to illustrate what I mean:
> 
> 1)  find all items between f1 and f2
> 2)  find all items "equal" to f1 or f2
> 3)  find all items not between f1 and f2
> 
> Tackling these kind of problems in a "natural" fashion would be very nice.
> Since they are really set problems, it would be nice to be able to union and
> intersect them also. :)

Correct.

But this Query language should allow us build tree of query.

Then you ask Valentina resolve this query, and Valentina self optimize it,
get sets, make unions and intersects, and return you result.

-- 
Best regards,
Ruslan Zasukhin      [ I feel the need...the need for speed ]
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e-mail: ruslan at paradigmasoft.com
web: http://www.paradigmasoft.com

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