CREATE TABLE test_timestamp (
	i timestamp
);

INSERT INTO test_timestamp VALUES
	( '2004-10-26 03:55:08' ),
	( '2004-10-26 04:55:08' ),
	( '2004-10-26 05:55:08' ),
	( '2004-10-26 08:55:08' ),
	( '2004-10-26 09:55:08' ),
	( '2004-10-26 10:55:08' )
;

SELECT i::timestamptz AS i INTO test_timestamptz FROM test_timestamp;

SELECT i <=> '2004-10-26 06:24:08', i FROM test_timestamp ORDER BY 1, 2 ASC;
SELECT i <=| '2004-10-26 06:24:08', i FROM test_timestamp ORDER BY 1, 2 ASC;
SELECT i |=> '2004-10-26 06:24:08', i FROM test_timestamp ORDER BY 1, 2 ASC;

CREATE INDEX idx_timestamp ON test_timestamp USING rum (i);
CREATE INDEX idx_timestamptz ON test_timestamptz USING rum (i);

set enable_seqscan=off;

explain (costs off)
SELECT * FROM test_timestamp WHERE i<'2004-10-26 08:55:08'::timestamp ORDER BY i;
SELECT * FROM test_timestamp WHERE i<'2004-10-26 08:55:08'::timestamp ORDER BY i;

explain (costs off)
SELECT * FROM test_timestamp WHERE i<='2004-10-26 08:55:08'::timestamp ORDER BY i;
SELECT * FROM test_timestamp WHERE i<='2004-10-26 08:55:08'::timestamp ORDER BY i;

explain (costs off)
SELECT * FROM test_timestamp WHERE i='2004-10-26 08:55:08'::timestamp ORDER BY i;
SELECT * FROM test_timestamp WHERE i='2004-10-26 08:55:08'::timestamp ORDER BY i;

explain (costs off)
SELECT * FROM test_timestamp WHERE i>='2004-10-26 08:55:08'::timestamp ORDER BY i;
SELECT * FROM test_timestamp WHERE i>='2004-10-26 08:55:08'::timestamp ORDER BY i;

explain (costs off)
SELECT * FROM test_timestamp WHERE i>'2004-10-26 08:55:08'::timestamp ORDER BY i;
SELECT * FROM test_timestamp WHERE i>'2004-10-26 08:55:08'::timestamp ORDER BY i;

explain (costs off)
SELECT * FROM test_timestamptz WHERE i>'2004-10-26 08:55:08'::timestamptz ORDER BY i;
SELECT * FROM test_timestamptz WHERE i>'2004-10-26 08:55:08'::timestamptz ORDER BY i;