mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-24 10:27:19 +02:00
9f984ba6d2
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
97 lines
2.2 KiB
Plaintext
97 lines
2.2 KiB
Plaintext
-- macaddr check
|
|
CREATE TABLE macaddr8tmp (a macaddr8);
|
|
\copy macaddr8tmp from 'data/macaddr.data'
|
|
SET enable_seqscan=on;
|
|
SELECT count(*) FROM macaddr8tmp WHERE a < '22:00:5c:e5:9b:0d';
|
|
count
|
|
-------
|
|
56
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a <= '22:00:5c:e5:9b:0d';
|
|
count
|
|
-------
|
|
60
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a = '22:00:5c:e5:9b:0d';
|
|
count
|
|
-------
|
|
4
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a >= '22:00:5c:e5:9b:0d';
|
|
count
|
|
-------
|
|
544
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a > '22:00:5c:e5:9b:0d';
|
|
count
|
|
-------
|
|
540
|
|
(1 row)
|
|
|
|
SET client_min_messages = DEBUG1;
|
|
CREATE INDEX macaddr8idx ON macaddr8tmp USING gist ( a );
|
|
DEBUG: building index "macaddr8idx" on table "macaddr8tmp" serially
|
|
DEBUG: using sorted GiST build
|
|
CREATE INDEX macaddr8idx_b ON macaddr8tmp USING gist ( a ) WITH (buffering=on);
|
|
DEBUG: building index "macaddr8idx_b" on table "macaddr8tmp" serially
|
|
DROP INDEX macaddr8idx_b;
|
|
RESET client_min_messages;
|
|
SET enable_seqscan=off;
|
|
SELECT count(*) FROM macaddr8tmp WHERE a < '22:00:5c:e5:9b:0d'::macaddr8;
|
|
count
|
|
-------
|
|
56
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a <= '22:00:5c:e5:9b:0d'::macaddr8;
|
|
count
|
|
-------
|
|
60
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a = '22:00:5c:e5:9b:0d'::macaddr8;
|
|
count
|
|
-------
|
|
4
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a >= '22:00:5c:e5:9b:0d'::macaddr8;
|
|
count
|
|
-------
|
|
544
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM macaddr8tmp WHERE a > '22:00:5c:e5:9b:0d'::macaddr8;
|
|
count
|
|
-------
|
|
540
|
|
(1 row)
|
|
|
|
-- Test index-only scans
|
|
SET enable_bitmapscan=off;
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT * FROM macaddr8tmp WHERE a < '02:03:04:05:06:07'::macaddr8;
|
|
QUERY PLAN
|
|
---------------------------------------------------------
|
|
Index Only Scan using macaddr8idx on macaddr8tmp
|
|
Index Cond: (a < '02:03:04:ff:fe:05:06:07'::macaddr8)
|
|
(2 rows)
|
|
|
|
SELECT * FROM macaddr8tmp WHERE a < '02:03:04:05:06:07'::macaddr8;
|
|
a
|
|
-------------------------
|
|
01:02:37:ff:fe:05:4f:36
|
|
01:02:37:ff:fe:05:4f:36
|
|
01:02:37:ff:fe:05:4f:36
|
|
01:02:37:ff:fe:05:4f:36
|
|
01:43:b5:ff:fe:79:eb:0f
|
|
01:43:b5:ff:fe:79:eb:0f
|
|
01:43:b5:ff:fe:79:eb:0f
|
|
01:43:b5:ff:fe:79:eb:0f
|
|
(8 rows)
|
|
|