'Parameters:
- db_name
- tbl_name
- filter
- max_parts'

def get_part_specs_by_filter(self, db_name, tbl_name, filter, max_parts):

    self.send_get_part_specs_by_filter(db_name, tbl_name, filter, max_parts)
    return self.recv_get_part_specs_by_filter()
