comment can not transfer single quote normally in comment string

SQL>comment on table test_1 is 'this is Lily''s comment';

• • • ERROR[15005] Unmatched quote in input (unterminated string):
      insert into TRAFODION."MD".TEXT values (3198837518524697516, 3, 0, 0, 0, 'this is Lily's comment') ; [2018-03-18 12:59:21]

SQL>comment on table test_1 is 'this is Lily''''s comment';

— SQL operation complete.

SQL>showddl test_1;

CREATE TABLE TRAFODION.TEST_COMMENT.TEST_1
  (
    A INT DEFAULT NULL NOT SERIALIZED
  )
 ATTRIBUTES ALIGNED FORMAT
;

COMMENT ON TABLE TRAFODION.TEST_COMMENT.TEST_1 IS 'this is Lily's comment' ;

— SQL operation complete.|