On Wed, Nov 1, 2017 at 8:41 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > 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. >
+1. That would be helpful. -- Best Wishes, Ashutosh Bapat EnterpriseDB Corporation The Postgres Database Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
