Method register_aggregate

schema.hh:66–68

    routines.push_back(r);
  }
  virtual void register_aggregate(routine& r) {
    aggregates.push_back(r);
  }
  virtual op_iterator find_operator(sqltype *left, sqltype *right, sqltype *res) {
    typekey t(left, right, res);
    auto cons = index.equal_range(t);