The same simple question to relational theorist (with video now).

From: Evgeniy Grigoriev <grigoriev.e_at_gmail.com>
Date: Mon, 1 Apr 2013 09:29:26 -0700 (PDT)
Message-ID: <f6da4df6-79f0-4760-94ef-fe213811b6bb_at_googlegroups.com>



Hi everyone.

Last year I asked a question:
"…is a way of how I create the normal relations important? Suppose a part of system exists which creates the relations according to some external non-normar expression descrided some data. This part of system translates external expression into commands which create a set of normal relations. So user of such system gives to the system some non-normal data description expressions but operates with the data presented in form of normal virtual relations only. (once again - all data are presented for user in form of normal relations). Is such system relational?"

In other words, the question is how the relations are introduced in system, how their existence is defined. In traditional relational DBMS the existence of relations defined evidently one-by-one, when tables and views are created by user manifestly. On the contrary, I suppose that a system is possible, which implicitly defines existence of a multitude of relations at once, when non-relational structures are described by customer.

I've got an answer from you: "Probably yes, but it's neccessary to define exactly the rules of play".

Now I can demonstrate a prototype which implements a very simple idea: as soon as data have been described in object-oriented way, they are immediately represented in relational way. You can see a video by link (720HD is available) ---> http://youtu.be/K9opP7-vh18 .

Also you can read a PDF paper, where idea of proper correlations between object-oriented and relational systems is give ---> http://odbms.org/download/EvgeniyGrigoriev.pdf .

And I have the same question. Is the demonstrated system relational? I think yes (because all data are represented as a set of relations), but I really try to find objections if I'm right.

Best regards.

PS. I'm very sorry for my spoken English in the video. My friends living in US say that it's OK... almost :) . So, if you have a question, don't hesitate to ask me. Received on Mon Apr 01 2013 - 18:29:26 CEST

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