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postgres/contrib/btree_gist/sql/time.sql
Tom Lane 8436489c81 Add KNNGIST support to contrib/btree_gist.
This extends GiST's support for nearest-neighbor searches to many of the
standard data types.

Teodor Sigaev
2011-03-02 14:44:33 -05:00

38 lines
990 B
SQL

-- time check
CREATE TABLE timetmp (a time);
\copy timetmp from 'data/time.data'
SET enable_seqscan=on;
SELECT count(*) FROM timetmp WHERE a < '10:57:11';
SELECT count(*) FROM timetmp WHERE a <= '10:57:11';
SELECT count(*) FROM timetmp WHERE a = '10:57:11';
SELECT count(*) FROM timetmp WHERE a >= '10:57:11';
SELECT count(*) FROM timetmp WHERE a > '10:57:11';
SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
CREATE INDEX timeidx ON timetmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM timetmp WHERE a < '10:57:11'::time;
SELECT count(*) FROM timetmp WHERE a <= '10:57:11'::time;
SELECT count(*) FROM timetmp WHERE a = '10:57:11'::time;
SELECT count(*) FROM timetmp WHERE a >= '10:57:11'::time;
SELECT count(*) FROM timetmp WHERE a > '10:57:11'::time;
EXPLAIN (COSTS OFF)
SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;