Method Empty

cpp/src/arrow/acero/sorted_merge_node.cc:135–142

  row_index_t GetLatestRow() const { return latest_ref_row_; }

  bool Empty() const {
    // cannot be empty if ref row is >0 -- can avoid slow queue lock
    // below
    if (latest_ref_row_ > 0) {
      return false;
    }
    return queue_.Empty();
  }

  size_t index() const { return index_; }