@Override
  public void close() throws Exception {
    for (ColumnTransformer columnTransformer : projectOutputTransformerList) {
      columnTransformer.close();
    }
    if (filterOutputTransformer != null) {
      filterOutputTransformer.close();
    }
    inputOperator.close();
  }
Return the TsBlock that contains both initial input columns and columns of common
subexpressions after filtering.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/process/FilterAndProjectOperator.java