Ashutosh Bapat <ashutosh.ba...@enterprisedb.com> writes: > On Wed, Nov 1, 2017 at 3:15 AM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> here's a patch to fix the planner so that eval costs and selectivity of >> HAVING quals are factored into the appropriate plan node numbers. >> ... >> + /* Add cost of qual, if any --- but we ignore its selectivity */
> And may be we should try to explain why can we ignore selectivity. > Similarly for the changes in create_minmaxagg_path(). I'm sure you realize that's because the estimate is already just one row ... but sure, we can spell that out. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers