Method Project

cpp/src/arrow/dataset/scanner.cc:919–926

}

Status ScannerBuilder::Project(std::vector<std::string> columns) {
  ARROW_ASSIGN_OR_RAISE(
      auto projection,
      ProjectionDescr::FromNames(std::move(columns), *scan_options_->dataset_schema,
                                 scan_options_->add_augmented_fields));
  SetProjection(scan_options_.get(), std::move(projection));
  return Status::OK();
}

Status ScannerBuilder::Project(std::vector<compute::Expression> exprs,
                               std::vector<std::string> names) {