Re: How the planner uses statistics

Mark,

> > 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 www.powerpostgresql.org, if you want;
I think a lot of people would be interested.

--
Josh Berkus
Aglio Database Solutions
San Francisco