Class scope

grammar.hh:300–300

struct update_returning : update_stmt {
  shared_ptr<struct select_list> select_list;
  update_returning(prod *p, struct scope *s, table *victim = 0);
  virtual void out(std::ostream &out) {
    update_stmt::out(out);
    out << std::endl << "returning " << *select_list;