set enable_seqscan=off; CREATE TABLE test_text ( i text ); INSERT INTO test_text VALUES ('a'),('ab'),('abc'),('abb'),('axy'),('xyz'); CREATE INDEX idx_text ON test_text USING gin (i); SELECT * FROM test_text WHERE i<'abc' ORDER BY i; SELECT * FROM test_text WHERE i<='abc' ORDER BY i; SELECT * FROM test_text WHERE i='abc' ORDER BY i; SELECT * FROM test_text WHERE i>='abc' ORDER BY i; SELECT * FROM test_text WHERE i>'abc' ORDER BY i; explain (costs off) SELECT * FROM test_text WHERE i<'abc'::name COLLATE "default" ORDER BY i; SELECT * FROM test_text WHERE i<'abc'::name COLLATE "default" ORDER BY i; SELECT * FROM test_text WHERE i<='abc'::name COLLATE "default" ORDER BY i; SELECT * FROM test_text WHERE i='abc'::name COLLATE "default" ORDER BY i; SELECT * FROM test_text WHERE i>='abc'::name COLLATE "default" ORDER BY i; SELECT * FROM test_text WHERE i>'abc'::name COLLATE "default" ORDER BY i;