set enable_seqscan=off; CREATE TABLE test_name ( i name ); INSERT INTO test_name VALUES ('a'),('ab'),('abc'),('abb'),('axy'),('xyz'); CREATE INDEX idx_name ON test_name USING gin (i); SELECT * FROM test_name WHERE i<'abc' ORDER BY i; SELECT * FROM test_name WHERE i<='abc' ORDER BY i; SELECT * FROM test_name WHERE i='abc' ORDER BY i; SELECT * FROM test_name WHERE i>='abc' ORDER BY i; SELECT * FROM test_name WHERE i>'abc' ORDER BY i; EXPLAIN (COSTS OFF) SELECT * FROM test_name WHERE i<'abc' ORDER BY i; EXPLAIN (COSTS OFF) SELECT * FROM test_name WHERE i<='abc' ORDER BY i; EXPLAIN (COSTS OFF) SELECT * FROM test_name WHERE i='abc' ORDER BY i; EXPLAIN (COSTS OFF) SELECT * FROM test_name WHERE i>='abc' ORDER BY i; EXPLAIN (COSTS OFF) SELECT * FROM test_name WHERE i>'abc' ORDER BY i; explain (costs off) SELECT * FROM test_name WHERE i<'abc'::text ORDER BY i; SELECT * FROM test_name WHERE i<'abc'::text ORDER BY i; SELECT * FROM test_name WHERE i<='abc'::text ORDER BY i; SELECT * FROM test_name WHERE i='abc'::text ORDER BY i; SELECT * FROM test_name WHERE i>='abc'::text ORDER BY i; SELECT * FROM test_name WHERE i>'abc'::text ORDER BY i; SELECT * FROM test_name WHERE i<=repeat('abc', 100) ORDER BY i;