Re: join removal

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Greg Stark <stark(at)mit(dot)edu>, "<pgsql-hackers(at)postgresql(dot)org>" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: join removal
Date: 2010-03-28 16:24:51
Message-ID: 1269793491.3684.2640.camel@ebony
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On Sun, 2010-03-28 at 02:15 -0400, Tom Lane wrote:
> I wrote:
> > [ crude patch ]
>
> Oh, btw, if you try to run the regression test additions in that patch
> against CVS HEAD, you'll find out that HEAD actually fails to optimize
> the two-levels-of-removable-joins case. Seems like another reason to
> press ahead with making the change.

Yes, please.

Does the new patch find more than two levels of join removal?

--
Simon Riggs www.2ndQuadrant.com

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