code: def _query_uncompressed(options, collection_name, num_to_skip,
            num_to_return, query, field_selector, opts, check_keys=False):
      
      op_query, max_bson_size = _query(
          options,
          collection_name,
          num_to_skip,
          num_to_return,
          query,
          field_selector,
          opts,
          check_keys)
      rid, msg = __pack_message(2004, op_query)
      return rid, msg, max_bson_size
docs: Internal query message helper.