Re: EXPLAIN ANALYZE not displaying recheck condition
От | Jeff Janes |
---|---|
Тема | Re: EXPLAIN ANALYZE not displaying recheck condition |
Дата | |
Msg-id | CAMkU=1ytQ8c8+5S-UxQBrOdjY731Ew7EaNLpDTVwXCo6DO+k3A@mail.gmail.com обсуждение исходный текст |
Ответ на | EXPLAIN ANALYZE not displaying recheck condition (Ryan Lambert <ryan@rustprooflabs.com>) |
Ответы |
Re: EXPLAIN ANALYZE not displaying recheck condition
|
Список | pgsql-bugs |
On Thu, Nov 7, 2019 at 5:04 PM Ryan Lambert <ryan@rustprooflabs.com> wrote:
Hello,In Pg12 I noticed the output from EXPLAIN ANALYZE no longer displays the recheck condition when using GIST indexes, such as:
I can't reproduce this using postgis 2.5.2 in Pg12. What version of postgis are you using, and how did you install it?
I use this sequence of commands, and I still get the recheck listed:
create schema osm;
create extension postgis;
create table osm.boundary_polygon (way geometry, name text);
create table osm.road_line (way geometry, highway text, ref text);
create index on osm.road_line using gist (way );
set enable_indexscan TO off;
set enable_seqscan TO off;
EXPLAIN (ANALYZE)
SELECT r.highway, r.ref, r.way
FROM osm.boundary_polygon b
INNER JOIN osm.road_line r ON ST_Contains(b.way, r.way)
WHERE b.name = 'Jefferson County' ;
create extension postgis;
create table osm.boundary_polygon (way geometry, name text);
create table osm.road_line (way geometry, highway text, ref text);
create index on osm.road_line using gist (way );
set enable_indexscan TO off;
set enable_seqscan TO off;
EXPLAIN (ANALYZE)
SELECT r.highway, r.ref, r.way
FROM osm.boundary_polygon b
INNER JOIN osm.road_line r ON ST_Contains(b.way, r.way)
WHERE b.name = 'Jefferson County' ;
Cheers,
Jeff
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