On Sun, Oct 8, 2017 at 7:24 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Petr Jelinek <petr.jeli...@2ndquadrant.com> writes: >> Okay, that makes sense, thanks for explanation. Your patch is the way to >> go then. > > Hearing no further comment, pushed. Thanks for reviewing it.
The tautological col = col comparison on is occasionally used as a planner "hint" to correct for row count overestimates. Not a great solution, but PostgreSQL doesn't really have a better way to guide the planner. Those queries will now have to do something else, like col = col + 0, which still works. Regards, Ants Aasma -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
