Function SetProjection

cpp/src/arrow/dataset/scanner.cc:880–883

}

void SetProjection(ScanOptions* options, ProjectionDescr projection) {
  options->projection = std::move(projection.expression);
  options->projected_schema = std::move(projection.schema);
}

ScannerBuilder::ScannerBuilder(std::shared_ptr<Dataset> dataset)
    : ScannerBuilder(std::move(dataset), std::make_shared<ScanOptions>()) {}