mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-25 16:07:20 +02:00
Commit 16fa9b2b30
introduced a faster way to build GiST indexes, by
sorting all the data. This commit adds the sortsupport functions needed
to make use of that feature for btree_gist.
Author: Andrey Borodin
Discussion: https://www.postgresql.org/message-id/2F3F7265-0D22-44DB-AD71-8554C743D943@yandex-team.ru
48 lines
1.6 KiB
SQL
48 lines
1.6 KiB
SQL
-- interval check
|
|
|
|
CREATE TABLE intervaltmp (a interval);
|
|
|
|
\copy intervaltmp from 'data/interval.data'
|
|
|
|
SET enable_seqscan=on;
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a < '199 days 21:21:23';
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23';
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a = '199 days 21:21:23';
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23';
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23';
|
|
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
|
|
SET client_min_messages = DEBUG1;
|
|
CREATE INDEX intervalidx ON intervaltmp USING gist ( a );
|
|
CREATE INDEX intervalidx_b ON intervaltmp USING gist ( a ) WITH (buffering=on);
|
|
DROP INDEX intervalidx_b;
|
|
RESET client_min_messages;
|
|
|
|
SET enable_seqscan=off;
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a < '199 days 21:21:23'::interval;
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23'::interval;
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a = '199 days 21:21:23'::interval;
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23'::interval;
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23'::interval;
|
|
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
|
|
SET enable_indexonlyscan=off;
|
|
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|