fix update index alwasy return false problem
fix update index alwasy return false problem


Former-commit-id: ba0dcb9e66ea9cabf92447fd50435cffc9a59e5e
larryxiao/peloton,ranxian/peloton,larryxiao/peloton,omegaga/peloton,omegaga/peloton,omegaga/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,ranxian/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,ranxian/peloton,larryxiao/peloton,larryxiao/peloton,amaliujia/CMUDB-peloton,ranxian/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,larryxiao/peloton-1,larryxiao/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,larryxiao/peloton-1,omegaga/peloton,amaliujia/CMUDB-peloton,ranxian/peloton,larryxiao/peloton-1,ranxian/peloton,larryxiao/peloton-1,larryxiao/peloton,larryxiao/peloton-1,amaliujia/CMUDB-peloton