Function Materialize

cpp/src/arrow/dataset/scanner_test.cc:2433–2448

}

compute::Expression Materialize(std::vector<std::string> names,
                                bool include_aug_fields = false) {
  if (include_aug_fields) {
    for (auto aug_name :
         {"__fragment_index", "__batch_index", "__last_in_fragment", "__filename"}) {
      names.emplace_back(aug_name);
    }
  }

  std::vector<compute::Expression> exprs;
  for (const auto& name : names) {
    exprs.push_back(field_ref(name));
  }

  return project(exprs, names);
}
}  // namespace

TEST(ScanNode, Schema) {