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From: Guillaume Smet <guillaume.smet@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Gregory Stark <stark@enterprisedb.com>
Cc: pgsql-performance <pgsql-performance@postgresql.org>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] Estimation problem with a LIKE clause containing a /
Date: Fri, 9 Nov 2007 17:39:51 +0100
Message-ID: <1d4e0c10711090839v288a0614j174bdceadfc6b5b2@mail.gmail.com> (raw)
In-Reply-To: <11342.1194626025@sss.pgh.pa.us>
References: <1d4e0c10711070453q214f089cpd144cbb5193d3c4f@mail.gmail.com>
	<17767.1194453292@sss.pgh.pa.us>
	<11467.1194477248@sss.pgh.pa.us>
	<1d4e0c10711080208n6c9875b4tf5882da3ced18532@mail.gmail.com>
	<27405.1194542548@sss.pgh.pa.us>
	<87prykpc3q.fsf@oxford.xeocode.com>
	<25287.1194568820@sss.pgh.pa.us>
	<28300.1194574114@sss.pgh.pa.us>
	<87hcjvpydn.fsf@oxford.xeocode.com>
	<11342.1194626025@sss.pgh.pa.us>

On Nov 9, 2007 5:33 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> he's got no MCVs, presumably because the field
> is unique.

It is. The ancestors field contains the current folder itself so the
id of the folder (which is the primary key) is in it.

--
Guillaume



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  Subject: Re: [HACKERS] Estimation problem with a LIKE clause containing a /
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