message: added an exception for rowid column when validating columnrefs in a generated column expression
diff: @@ -39,6 +39,9 @@ GeneratedColumnDefinition GeneratedColumnDefinition::Deserialize(Deserializer &s
  static bool ColumnsContainsColumnRef(const vector<ColumnDefinition> &columns, const string &columnref) {
  for (auto &col : columns) {
  + if (columnref == "rowid") {
  + return true;
  + }
  if (col.name == columnref) {
  return true;
  }
  