Fix parameters order of gen_string_idx (#4739)
Fix parameters order of gen_string_idx (#4739)

* reorder

* update
intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL