int size(){
  if (largeTransactions) {
    return storedEntries + records.size();
  }
  if (SysProperties.CHECK && memoryUndo > records.size()) {
    DbException.throwInternalError();
  }
  return records.size();
}

int size ( ) { if ( largeTransactions ) { return storedEntries + records . size ( ) ; } if ( SysProperties . CHECK && memoryUndo > records . size ( ) ) { DbException . throwInternalError ( ) ; } return records . size ( ) ; }
get the number of active rows in this undo log .
