0: jdbc:drill:schema=dfs> select * from sys.options where type like '%SESSION%';
+------------+------------+------------+------------+------------+------------+------------+
| name | kind | type | num_val | string_val | bool_val | float_val |
+------------+------------+------------+------------+------------+------------+------------+
| drill.exec.testing.controls | STRING | SESSION | null | {} | null | null |
+------------+------------+------------+------------+------------+------------+------------+
1 row selected (0.218 seconds)