Affects Version/s: 0.14.0
Fix Version/s: None
1. You can have the case where
parentOfParent bucketCols is a,b
and parent bucketCols is b,a
i.e. bucketing trait doesn't depend on order.
2. You can also have the case
parentOfParent trait is (a)
and join is on (a,b) You can avoid shuffle in this case.