Method NewSelect

common/expr_factory.h:189–197

            typename = std::enable_if_t<IsExprLike<Operand>::value>,
            typename = std::enable_if_t<IsStringLike<Field>::value>>
  Expr NewSelect(ExprId id, Operand operand, Field field) {
    Expr expr;
    expr.set_id(id);
    auto& select_expr = expr.mutable_select_expr();
    select_expr.set_operand(std::move(operand));
    select_expr.set_field(std::move(field));
    select_expr.set_test_only(false);
    return expr;
  }

  template <typename Operand, typename Field,
            typename = std::enable_if_t<IsExprLike<Operand>::value>,