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From: Guillaume Smet <guillaume.smet@gmail.com>
To: david@lang.hm
Cc: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Scott Carey <scott@richrelevance.com>
Cc: bricklen <bricklen@gmail.com>
Cc: Scott Marlowe <scott.marlowe@gmail.com>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Poor plan choice in prepared statement
Date: Thu, 1 Jan 2009 20:29:43 +0100
Message-ID: <1d4e0c10901011129w443a096apac00c9d106669604@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0901011222190.15026@asgard.lang.hm>
References: <33b743250812301059u31ce82faw3d72a38280b37402@mail.gmail.com>
	<b42b73150812301142w4483978ahfb819b0313150dbb@mail.gmail.com>
	<BDFBB77C9E07BE4A984DAAE981D19F961ACD5F388E@EXVMBX018-1.exch018.msoutlookonline.net>
	<2796.1230678149@sss.pgh.pa.us>
	<20081231160118.GE3809@alvh.no-ip.org>
	<1d4e0c10901011022v4a1d5eeaidc2692a7729e79df@mail.gmail.com>
	<alpine.DEB.1.10.0901011222190.15026@asgard.lang.hm>

On Thu, Jan 1, 2009 at 9:24 PM,  <david@lang.hm> wrote:
> forgive my ignorance here, but if it's unnamed how can you reference it
> later to take advantage of the parsing?

You can't. That's what unnamed prepared statements are for.

It's not obvious to me that the parsing phase is worth any "caching".
From my experience, the planning phase takes far much time on complex
queries.

-- 
Guillaume



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