In the DataMine schema, an attribute can be defined as "isDesSortKey" or "isAscSortKey" if it is primitive. We want to support the scenario where a group-type attribute can be defined as a sort key.
In the DataMine schema, an attribute can be defined as "isDesSortKey" or "isAscSortKey" if it is primitive.
We want to support the scenario where a group-type attribute can be defined as a sort key.