1set enable_seqscan=off; 2 3CREATE TABLE test_timestamp ( 4 i timestamp 5); 6 7INSERT INTO test_timestamp VALUES 8 ( '2004-10-26 03:55:08' ), 9 ( '2004-10-26 04:55:08' ), 10 ( '2004-10-26 05:55:08' ), 11 ( '2004-10-26 08:55:08' ), 12 ( '2004-10-26 09:55:08' ), 13 ( '2004-10-26 10:55:08' ) 14; 15 16CREATE INDEX idx_timestamp ON test_timestamp USING gin (i); 17 18SELECT * FROM test_timestamp WHERE i<'2004-10-26 08:55:08'::timestamp ORDER BY i; 19SELECT * FROM test_timestamp WHERE i<='2004-10-26 08:55:08'::timestamp ORDER BY i; 20SELECT * FROM test_timestamp WHERE i='2004-10-26 08:55:08'::timestamp ORDER BY i; 21SELECT * FROM test_timestamp WHERE i>='2004-10-26 08:55:08'::timestamp ORDER BY i; 22SELECT * FROM test_timestamp WHERE i>'2004-10-26 08:55:08'::timestamp ORDER BY i; 23