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Re: graph representation of data structures in optimizer

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: pgsql-hackers(at)postgresql(dot)org
Cc: Adriano Lange <adriano(at)c3sl(dot)ufpr(dot)br>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Gregory Stark <stark(at)enterprisedb(dot)com>
Subject: Re: graph representation of data structures in optimizer
Date: 2009-02-19 20:33:40
Message-ID: 200902192233.41370.peter_e@gmx.net (view raw or flat)
Thread:
Lists: pgsql-hackers
On Thursday 19 February 2009 22:17:54 Adriano Lange wrote:
> Tom Lane escreveu:
> > But really I think the problem with this approach is that the
> > information density is too low --- imagine what it would look like in a
> > six-or-more-way join.  I don't think the graphical approach is helpful
> > at all here.
>
> I was thinking about the hard visualization and navigability in the
> graph. I think that a good solution for this would be a dynamic
> navigability in their nodes and a rearrange their positions by focused
> node. I'm not remembering now, but I've saw a tool like this.

http://prefuse.org could be useful for that.

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