docs: public static boolean isTableMaterializeViewSource(org.voltdb.catalog.Database database,
                                                         org.voltdb.catalog.Table table)
      {
          CatalogMap<Table> tables = database.getTables();
          for (Table t : tables) {
              Table matsrc = t.getMaterializer();
              if ((matsrc != null) && (matsrc.getRelativeIndex() == table.getRelativeIndex())) {
                  return true;
              }
          }
          return false;
      }