Method AppendScalarImpl

cpp/src/arrow/array/builder_dict.h:522–534

  template <typename IndexType>
  Status AppendScalarImpl(const typename TypeTraits<T>::ArrayType& dict,
                          const Scalar& index_scalar, int64_t n_repeats) {
    using ScalarType = typename TypeTraits<IndexType>::ScalarType;
    const auto index = internal::checked_cast<const ScalarType&>(index_scalar).value;
    if (index_scalar.is_valid && dict.IsValid(index)) {
      const auto& value = dict.GetView(index);
      for (int64_t i = 0; i < n_repeats; i++) {
        ARROW_RETURN_NOT_OK(Append(value));
      }
      return Status::OK();
    }
    return AppendNulls(n_repeats);
  }

  Status FinishInternal(std::shared_ptr<ArrayData>* out) override {
    std::shared_ptr<ArrayData> dictionary;