Method MaterializedFields

cpp/src/arrow/dataset/scanner.cc:62–72

using FragmentGenerator = std::function<Future<std::shared_ptr<Fragment>>()>;

std::vector<FieldRef> ScanOptions::MaterializedFields() const {
  std::vector<FieldRef> fields;

  for (const compute::Expression* expr : {&filter, &projection}) {
    auto refs = FieldsInExpression(*expr);
    fields.insert(fields.end(), std::make_move_iterator(refs.begin()),
                  std::make_move_iterator(refs.end()));
  }

  return fields;
}

std::vector<FieldPath> ScanV2Options::AllColumns(const Schema& dataset_schema) {
  std::vector<FieldPath> selection(dataset_schema.num_fields());