public Void apply(RelNode node) {

        CassandraSchema.this.addMaterializedViews();

        return null;

      }

    });

  }



  RelProtoDataType getRelDataType(String columnFamily, boolean view) {

    List<ColumnMetadata> columns;

    if (view) {

      columns = getKeyspace().getMaterializedView(columnFamily).getColumns();

    } else {

      columns = getKeyspace().getTable(columnFamily).getColumns();

    }



    final RelDataTypeFactory typeFactory =

        new SqlTypeFactoryImpl(RelDataTypeSystem.DEFAULT);

    final RelDataTypeFactory.FieldInfoBuilder fieldInfo = typeFactory.builder();

    for (ColumnMetadata column : columns) {

      final String columnName = column.getName();

      final DataType type = column.getType();