message: copied and adapted ungrouped tests for the grouped case
diff: @@ -45,13 +45,21 @@ select count(distinct few), count(distinct many) from tbl group by groups;
  # Mixed, different order
  query II
  -select count(distinct many), count(distinct few) from tbl;
  +select count(distinct many), count(distinct few) from tbl group by groups;
  ----
  -100000 100
  +20000 20
  +20000 20
  +20000 20
  +20000 20
  +20000 20
  # Mixed, with non-distinct inbetween
  query III
  -select count(distinct many), count(few), count(distinct few) from tbl;
  +select count(distinct many), count(few), count(distinct few) from tbl group by groups;
  ----
  -100000 1000000 100
  +20000 200000 20
  +20000 200000 20
  +20000 200000 20
  +20000 200000 20
  +20000 200000 20
  