mirror of
https://gitee.com/he3db/he3pg.git
synced 2024-12-04 21:27:35 +08:00
110 lines
3.4 KiB
Plaintext
110 lines
3.4 KiB
Plaintext
-- 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';
|
|
count
|
|
-------
|
|
329
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23';
|
|
count
|
|
-------
|
|
330
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a = '199 days 21:21:23';
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23';
|
|
count
|
|
-------
|
|
271
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23';
|
|
count
|
|
-------
|
|
270
|
|
(1 row)
|
|
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
a | ?column?
|
|
-------------------------------------+--------------------------------------
|
|
@ 199 days 21 hours 21 mins 23 secs | @ 0
|
|
@ 183 days 6 hours 52 mins 48 secs | @ 16 days 14 hours 28 mins 35 secs
|
|
@ 220 days 19 hours 5 mins 42 secs | @ 21 days -2 hours -15 mins -41 secs
|
|
(3 rows)
|
|
|
|
CREATE INDEX intervalidx ON intervaltmp USING gist ( a );
|
|
SET enable_seqscan=off;
|
|
SELECT count(*) FROM intervaltmp WHERE a < '199 days 21:21:23'::interval;
|
|
count
|
|
-------
|
|
329
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a <= '199 days 21:21:23'::interval;
|
|
count
|
|
-------
|
|
330
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a = '199 days 21:21:23'::interval;
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a >= '199 days 21:21:23'::interval;
|
|
count
|
|
-------
|
|
271
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM intervaltmp WHERE a > '199 days 21:21:23'::interval;
|
|
count
|
|
-------
|
|
270
|
|
(1 row)
|
|
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------------
|
|
Limit
|
|
-> Index Only Scan using intervalidx on intervaltmp
|
|
Order By: (a <-> '@ 199 days 21 hours 21 mins 23 secs'::interval)
|
|
(3 rows)
|
|
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
a | ?column?
|
|
-------------------------------------+--------------------------------------
|
|
@ 199 days 21 hours 21 mins 23 secs | @ 0
|
|
@ 183 days 6 hours 52 mins 48 secs | @ 16 days 14 hours 28 mins 35 secs
|
|
@ 220 days 19 hours 5 mins 42 secs | @ 21 days -2 hours -15 mins -41 secs
|
|
(3 rows)
|
|
|
|
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;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------------
|
|
Limit
|
|
-> Index Scan using intervalidx on intervaltmp
|
|
Order By: (a <-> '@ 199 days 21 hours 21 mins 23 secs'::interval)
|
|
(3 rows)
|
|
|
|
SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21:21:23' LIMIT 3;
|
|
a | ?column?
|
|
-------------------------------------+--------------------------------------
|
|
@ 199 days 21 hours 21 mins 23 secs | @ 0
|
|
@ 183 days 6 hours 52 mins 48 secs | @ 16 days 14 hours 28 mins 35 secs
|
|
@ 220 days 19 hours 5 mins 42 secs | @ 21 days -2 hours -15 mins -41 secs
|
|
(3 rows)
|
|
|