SPLIT subpartition_extended_name { AT ( literal [, literal]... ) [ INTO (range_subpartition_desc, range_subpartition_desc) ] | VALUES ({ literal | NULL [, literal | NULL ]...}) [ INTO (list_subpartition_desc, list_subpartition_desc) ] | INTO ( { range_subpartition_desc [, range_subpartition_desc ]... | list_subpartition_desc [, list_subpartition_desc ]... } , subpartition_spec ) } [ dependent_tables_clause ] [ update_index_clauses ] [ parallel_clause ] [ allow_disallow_clustering ]