public List<String> getRespColumns() {
    if (respColumns == null) {
      respColumns = new ArrayList<>();
      for (ColumnHeader columnHeader : columnHeaders) {
        respColumns.add(columnHeader.getColumnNameWithAlias());
      }
    }
    return respColumns;
  }
The header of query result dataset.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/common/header/DatasetHeader.java