--- On Fri, 12/2/11, Tom Lane <[email protected]> wrote:
> The only real fix for that will require cross-column > statistics, which > we don't have yet --- without such, there's no way for the > planner to > know that distributors have an atypical number of child > customers. The only caveat that I can think of here is that each of the customer_id's in the subselect ARE in the MCV list for the parent_customer column for that customer_rel table. If I had listed SPECIFIC customer ids in the subselect, I would get spot-on row estimates. Is there anything there that gives me any hope? -- Sent via pgsql-general mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
