code: @Override
      protected int add2Select(final SQLSelect _select)
      {
          _select.column(2, "ID").column(2, JCRStoreResource.COLNAME_IDENTIFIER)
              .leftJoin(JCRStoreResource.TABLENAME_STORE, 2, "ID", 0, "ID");
          return 1;
      }
docs: {@inheritDoc}