On Fri, 18 Jan 2019 at 19:08, sho kato <kato-...@jp.fujitsu.com> wrote: > I confirmed that this patch improve performance by 10 times or more.
Thanks for testing this out. > Also, I did make installcheck world, but test partition_prune failed. > However, this test case failed even before applying a patch, so this patch is > not a problem. > One of the results is as follows. > > explain (analyze, costs off, summary off, timing off) execute ab_q1 (2, 2, > 3); > - QUERY PLAN > ---------------------------------------------------------- > + QUERY PLAN > +------------------------------------------------------ > Append (actual rows=0 loops=1) > - Subplans Removed: 6 > -> Seq Scan on ab_a2_b1 (actual rows=0 loops=1) > - Filter: ((a >= $1) AND (a <= $2) AND (b <= $3)) > + Filter: ((a >= 2) AND (a <= 2) AND (b <= 3)) > -> Seq Scan on ab_a2_b2 (actual rows=0 loops=1) > - Filter: ((a >= $1) AND (a <= $2) AND (b <= $3)) > + Filter: ((a >= 2) AND (a <= 2) AND (b <= 3)) > -> Seq Scan on ab_a2_b3 (actual rows=0 loops=1) > - Filter: ((a >= $1) AND (a <= $2) AND (b <= $3)) > -(8 rows) > + Filter: ((a >= 2) AND (a <= 2) AND (b <= 3)) > +(7 rows) Perhaps you're running with plan_cache_mode = force_custom_plan. You'll likely need it set to auto for these to pass. -- David Rowley http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
