postgresql/contrib/btree_gist/sql/time.sql

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-- 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;