Class const_expr

expr.hh:54–59

};

struct const_expr: value_expr {
  std::string expr;
  const_expr(prod *p, sqltype *type_constraint = 0);
  virtual void out(std::ostream &out) { out << expr; }
  virtual ~const_expr() { }
};

struct column_reference: value_expr {
  column_reference(prod *p, sqltype *type_constraint = 0);