class ConstantColumnLoader extends StaticColumnLoader {

  @Override
  public VectorContainer load(int rowCount) {
    loader.startBatch();
    RowSetLoader writer = loader.writer();
    for (int i = 0; i < rowCount; i++) {
      writer.start();
      loadRow(writer);
      writer.save();
    }
    return loader.harvest();
  }

  public  ConstantColumnLoader(ResultVectorCache vectorCache,
      List<? extends ConstantColumnSpec> defns);

}