Method GetDictionaryView

cpp/src/arrow/array/data.cc:813–820

  }

  Result<std::shared_ptr<ArrayData>> GetDictionaryView(const DataType& out_type) {
    if (in_data[in_layout_idx]->type->id() != Type::DICTIONARY) {
      return InvalidView("Cannot get view as dictionary type");
    }
    const auto& dict_out_type = static_cast<const DictionaryType&>(out_type);
    return internal::GetArrayView(in_data[in_layout_idx]->dictionary,
                                  dict_out_type.value_type());
  }

  Status MakeDataView(const std::shared_ptr<Field>& out_field,
                      std::shared_ptr<ArrayData>* out) {