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Re: How the planner uses statistics

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Mark Kirkwood <markir(at)coretech(dot)co(dot)nz>
Cc: pgsql-docs(at)postgresql(dot)org
Subject: Re: How the planner uses statistics
Date: 2005-02-12 23:22:10
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-docs

> > I wanted to understand how the planner 'knows' how many rows are likely
> > to be emitted in a given stage of a query, and wrote down some examples
> > for my own benefit - I then wondered if this would be a good addition to
> > the 'Performance Tips' chapter. So... err here it is.
> >
> > Comments welcome.

Terrific.   I'd be happy to post this at, if you want; 
I think a lot of people would be interested.

Josh Berkus
Aglio Database Solutions
San Francisco

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