set enable_seqscan=off; -- ensure consistent test output regardless of the default bytea format SET bytea_output TO escape; CREATE TABLE test_bytea ( i bytea ); INSERT INTO test_bytea VALUES ('a'),('ab'),('abc'),('abb'),('axy'),('xyz'); CREATE INDEX idx_bytea ON test_bytea USING rum (i); SELECT * FROM test_bytea WHERE i<'abc'::bytea ORDER BY i; SELECT * FROM test_bytea WHERE i<='abc'::bytea ORDER BY i; SELECT * FROM test_bytea WHERE i='abc'::bytea ORDER BY i; SELECT * FROM test_bytea WHERE i>='abc'::bytea ORDER BY i; SELECT * FROM test_bytea WHERE i>'abc'::bytea ORDER BY i;