Finds the group of a query below the given operation.
From the top, a group can be wrapped by the extends and orderings of the projection, then the trailing VALUES clause,
and then the HAVING conditions. from tells which of these the given operation can still be.
Finds the group of a query below the given operation. From the top, a group can be wrapped by the extends and orderings of the projection, then the trailing VALUES clause, and then the HAVING conditions.
fromtells which of these the given operation can still be.