Method AppendArraySlice

cpp/src/arrow/array/builder_union.cc:48–61

}

Status DenseUnionBuilder::AppendArraySlice(const ArraySpan& array, const int64_t offset,
                                           const int64_t length) {
  const int8_t* type_codes = array.GetValues<int8_t>(1);
  const int32_t* offsets = array.GetValues<int32_t>(2);
  for (int64_t row = offset; row < offset + length; row++) {
    const int8_t type_code = type_codes[row];
    const int child_id = type_id_to_child_id_[type_code];
    const int32_t union_offset = offsets[row];
    RETURN_NOT_OK(Append(type_code));
    RETURN_NOT_OK(type_id_to_children_[type_code]->AppendArraySlice(
        array.child_data[child_id], union_offset, /*length=*/1));
  }
  return Status::OK();
}

Status DenseUnionBuilder::FinishInternal(std::shared_ptr<ArrayData>* out) {
  ARROW_RETURN_NOT_OK(BasicUnionBuilder::FinishInternal(out));