anchor.diff:                                                           <<"-1.0">>,
                                                            <<"-1.0">>,
                                                            <<"-mydouble">>,
  -                                                         <<"-mydouble">>
  +                                                         <<"-mydouble">>,
  +                                                         <<"-1">>,
  +                                                         <<"-1.0">>
                                                           ]
                                       },
                    Sel).
  
positive.code: 
  select_negation_test() ->
      DDL = get_sel_ddl(),
      SQL = "SELECT -1, - 1, -1.0, - 1.0, -mydouble, - mydouble from mytab "
          "WHERE myfamily = 'familyX' AND myseries = 'seriesX' "
          "AND time > 1 AND time < 2",
      {ok, Rec} = get_query(SQL),
  
negative.code:                                                          double,
                                                           double,
                                                           double,
                                                           double,
                                                           sint64,
                                                           double
                                                          ],
                                       col_names        = [
  