Method MetadataEqual

cpp/src/arrow/compare.cc:717–723

      : right_(right), check_metadata_(check_metadata), result_(false) {}

  bool MetadataEqual(const Field& left, const Field& right) {
    if (left.HasMetadata() && right.HasMetadata()) {
      return left.metadata()->Equals(*right.metadata());
    } else {
      return !left.HasMetadata() && !right.HasMetadata();
    }
  }

  Status VisitChildren(const DataType& left) {
    if (left.num_fields() != right_.num_fields()) {