On Wed, May 15, 2013 at 01:30:57PM -0400, Nikolas Everett wrote: > The option that always made the most sense to me was having folks ask > postgres to collect the statistic by running some command that marks two > columns as correlated. This could at least be a starting point.
One suggestion made in the past was to calculate these stats (provided someone comes up with something worthwhile to calculate, that is) for all columns involved in a multicolumn index. That probably doesn't cover all the places we'd like the planner to know stuff like this, but it's a reasonable start. -- Joshua Tolley / eggyknap End Point Corporation http://www.endpoint.com
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