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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Mladen Gogala <mladen.gogala@vmsinfo.com>
Cc: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: anti-join chosen even when slower than old plan
Date: Thu, 11 Nov 2010 12:45:51 -0500
Message-ID: <17688.1289497551@sss.pgh.pa.us> (raw)
In-Reply-To: <4CDC2424.9010102@vmsinfo.com>
References: <4CD9663502000025000374B1@gw.wicourts.gov>
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	<4CDA62C60200002500037512@gw.wicourts.gov>
	<AANLkTi=eNXKEBo5dXJDd4+aHhfmkibH++fqjj12+DA3o@mail.gmail.com>
	<4CDACBBF020000250003755B@gw.wicourts.gov>
	<4CDB7BAA.7020506@vmsinfo.com>
	<4CDBB0A40200002500037571@gw.wicourts.gov>
	<4CDC2424.9010102@vmsinfo.com>

Mladen Gogala <mladen.gogala@vmsinfo.com> writes:
> Again, having an optimizer which will choose the plan completely 
> accurately is, at least in my opinion, less important than having a 
> possibility of manual control, the aforementioned "knobs and buttons" 
> and produce the same plan for the same statement.

More knobs and buttons is the Oracle way, and the end result of that
process is that you have something as hard to use as Oracle.  That's
generally not thought of as desirable in this community.

			regards, tom lane



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