Function for

cpp/src/parquet/arrow/reader.cc:826–833

  }

  END_PARQUET_CATCH_EXCEPTIONS
  // Gather children arrays and def levels
  for (auto& child : children_) {
    std::shared_ptr<ChunkedArray> field;
    RETURN_NOT_OK(child->BuildArray(validity_io.values_read, &field));
    ARROW_ASSIGN_OR_RAISE(std::shared_ptr<ArrayData> array_data, ChunksToSingle(*field));
    children_array_data.push_back(std::move(array_data));
  }

  if (!filtered_field_->nullable() && !has_repeated_child_) {
    validity_io.values_read = children_array_data.front()->length;