Re: Transitive Closure
From: Alfredo Novoa <alfredo_at_ncs.es>
Date: Fri, 14 May 2004 18:37:37 GMT
Message-ID: <40a51057.8060810_at_news.wanadoo.es>
Date: Fri, 14 May 2004 18:37:37 GMT
Message-ID: <40a51057.8060810_at_news.wanadoo.es>
On Fri, 14 May 2004 10:23:36 -0700, "Mikito Harakiri"
<mikharakiri_at_iahu.com> wrote:
>Then, it's inconvenience, at least. Trees are usually represented with
You can apply the TC over a projection.
>From bigger perspective, it looks more than just a minor limitation. It's
No because TC returns a relation.
What breaks relational closure is Tutorial's D "from" operator, but it
is intended to do that.
>relations that combine nodes and edges together, and you effectively
>prohibit TC working with trees.
>breaking relational closure.
You can invent many of them.
Regards
Alfredo
Received on Fri May 14 2004 - 20:37:37 CEST