Costin Leau 9ffb26ab02
SQL: Remove restriction for single column grouping (#31818)
For historical reasons SQL restricts GROUP BY to only one field.
This commit removes the restriction and improves the test suite with
multi group by tests.

Close #31793
2018-07-06 20:55:27 +03:00
..
2017-11-15 21:35:54 +11:00
2018-06-28 10:59:35 -04:00