Re: how the planner decides between bitmap/index scan

From: Scara Maccai <m_lists(at)yahoo(dot)it>
To: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: how the planner decides between bitmap/index scan
Date: 2009-05-19 08:51:26
Message-ID: 367727.47532.qm@web24607.mail.ird.yahoo.com
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Ops, found it:

http://www.postgresql.org/docs/8.4/static/view-pg-stats.html

("correlation" column)

I guess it would be worth pointing it out in the planner docs...

Scara Maccai wrote:
> Hi,
>
> does the planner know how "scattered" rows are? If yes: where is this
> info stored?

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