1set enable_seqscan=off; 2 3CREATE TABLE test_int4 ( 4 i int4 5); 6 7INSERT INTO test_int4 VALUES (-2),(-1),(0),(1),(2),(3); 8 9CREATE INDEX idx_int4 ON test_int4 USING gin (i); 10 11SELECT * FROM test_int4 WHERE i<1::int4 ORDER BY i; 12SELECT * FROM test_int4 WHERE i<=1::int4 ORDER BY i; 13SELECT * FROM test_int4 WHERE i=1::int4 ORDER BY i; 14SELECT * FROM test_int4 WHERE i>=1::int4 ORDER BY i; 15SELECT * FROM test_int4 WHERE i>1::int4 ORDER BY i; 16