Drill planer should not allow select * with group by clause

The following query should not be allowed in Drill planner.

select * from cp.`tpch/nation.parquet` group by n_regionkey;
+----+
| *  |
+----+
| 0  |
| 1  |
| 4  |
| 3  |
| 2  |
+----+

However, Drill allow such query to run and even worse the result is incorrect. It would make sense that we block such type of query.