Method Ingest_some_nulls

r/src/array_to_vector.cpp:770–787

  }

  Status Ingest_some_nulls(SEXP data, const std::shared_ptr<arrow::Array>& array,
                           R_xlen_t start, R_xlen_t n, size_t chunk_index) const {
    auto struct_array = checked_cast<const arrow::StructArray*>(array.get());
    int nf = static_cast<int>(converters.size());
    // Flatten() deals with merging of nulls
    auto arrays = ValueOrStop(struct_array->Flatten(gc_memory_pool()));
    for (int i = 0; i < nf; i++) {
      SEXP data_i = VECTOR_ELT(data, i);

      // only ingest if the column is not altrep
      if (!altrep::is_unmaterialized_arrow_altrep(data_i)) {
        StopIfNotOk(converters[i]->Ingest_some_nulls(VECTOR_ELT(data, i), arrays[i],
                                                     start, n, chunk_index));
      }
    }

    return Status::OK();
  }

  virtual bool Parallel() const {
    // this can only run in parallel if all the