Method num_row_groups

cpp/src/parquet/arrow/reader.cc:361–361

  ParquetFileReader* parquet_reader() const override { return reader_.get(); }

  int num_row_groups() const override { return reader_->metadata()->num_row_groups(); }

  void set_use_threads(bool use_threads) override {
    reader_properties_.set_use_threads(use_threads);