mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-24 15:07:19 +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
215 lines
3.5 KiB
Plaintext
215 lines
3.5 KiB
Plaintext
-- numeric check
|
|
CREATE TABLE numerictmp (a numeric);
|
|
\copy numerictmp from 'data/int8.data'
|
|
\copy numerictmp from 'data/numeric.data'
|
|
\copy numerictmp from 'data/float8.data'
|
|
SET enable_seqscan=on;
|
|
SELECT count(*) FROM numerictmp WHERE a < -1890.0;
|
|
count
|
|
-------
|
|
505
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a <= -1890.0;
|
|
count
|
|
-------
|
|
506
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a = -1890.0;
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a >= -1890.0;
|
|
count
|
|
-------
|
|
597
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a > -1890.0;
|
|
count
|
|
-------
|
|
596
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a < 'NaN' ;
|
|
count
|
|
-------
|
|
1100
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a <= 'NaN' ;
|
|
count
|
|
-------
|
|
1102
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a = 'NaN' ;
|
|
count
|
|
-------
|
|
2
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a >= 'NaN' ;
|
|
count
|
|
-------
|
|
2
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a > 'NaN' ;
|
|
count
|
|
-------
|
|
0
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a < 0 ;
|
|
count
|
|
-------
|
|
523
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a <= 0 ;
|
|
count
|
|
-------
|
|
526
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a = 0 ;
|
|
count
|
|
-------
|
|
3
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a >= 0 ;
|
|
count
|
|
-------
|
|
579
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a > 0 ;
|
|
count
|
|
-------
|
|
576
|
|
(1 row)
|
|
|
|
SET client_min_messages = DEBUG1;
|
|
CREATE INDEX numericidx ON numerictmp USING gist ( a );
|
|
DEBUG: building index "numericidx" on table "numerictmp" serially
|
|
DEBUG: using sorted GiST build
|
|
CREATE INDEX numericidx_b ON numerictmp USING gist ( a ) WITH (buffering=on);
|
|
DEBUG: building index "numericidx_b" on table "numerictmp" serially
|
|
DROP INDEX numericidx_b;
|
|
RESET client_min_messages;
|
|
SET enable_seqscan=off;
|
|
SELECT count(*) FROM numerictmp WHERE a < -1890.0;
|
|
count
|
|
-------
|
|
505
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a <= -1890.0;
|
|
count
|
|
-------
|
|
506
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a = -1890.0;
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a >= -1890.0;
|
|
count
|
|
-------
|
|
597
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a > -1890.0;
|
|
count
|
|
-------
|
|
596
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a < 'NaN' ;
|
|
count
|
|
-------
|
|
1100
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a <= 'NaN' ;
|
|
count
|
|
-------
|
|
1102
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a = 'NaN' ;
|
|
count
|
|
-------
|
|
2
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a >= 'NaN' ;
|
|
count
|
|
-------
|
|
2
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a > 'NaN' ;
|
|
count
|
|
-------
|
|
0
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a < 0 ;
|
|
count
|
|
-------
|
|
523
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a <= 0 ;
|
|
count
|
|
-------
|
|
526
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a = 0 ;
|
|
count
|
|
-------
|
|
3
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a >= 0 ;
|
|
count
|
|
-------
|
|
579
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM numerictmp WHERE a > 0 ;
|
|
count
|
|
-------
|
|
576
|
|
(1 row)
|
|
|
|
-- Test index-only scans
|
|
SET enable_bitmapscan=off;
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------
|
|
Sort
|
|
Sort Key: a
|
|
-> Index Only Scan using numericidx on numerictmp
|
|
Index Cond: ((a >= '1'::numeric) AND (a <= '300'::numeric))
|
|
(4 rows)
|
|
|
|
SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
|
|
a
|
|
------------
|
|
204.035430
|
|
207.400532
|
|
(2 rows)
|
|
|