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Re: [PATCHES] Minimum selectivity estimate for LIKE 'prefix%'

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PATCHES] Minimum selectivity estimate for LIKE 'prefix%'
Date: 2008-03-31 16:33:26
Message-ID: 200803311833.27131.peter_e@gmx.net (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
Am Montag, 31. März 2008 schrieb Tom Lane:
> Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> > OK, first results with this patch are in: The selectivity estimations are
> > adjusted nicely, but the cost calculation doesn't change at all.  Before:
>
> I've forgotten the context ... what's the whole query and plan again?
> And which PG version exactly?

Please see http://archives.postgresql.org/pgsql-hackers/2008-01/msg00048.php

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