message: fixed a bug in parquet reading when there were no statistics
diff: @@ -290,6 +290,9 @@ unique_ptr<BaseStatistics> ParquetReader::ReadStatistics(LogicalType &type, colu
  for (auto &row_group : file_meta_data->row_groups) {
  auto chunk_stats = column_reader->Stats(row_group.columns);
  + if (!chunk_stats) {
  + return nullptr;
  + }
  if (!column_stats) {
  column_stats = move(chunk_stats);
  } else {
  