Class HierarchyUsage


  • public class HierarchyUsage
    extends Object
    A HierarchyUsage is the usage of a hierarchy in the context of a cube. Private hierarchies can only be used in their own cube. Public hierarchies can be used in several cubes. The problem comes when several cubes which the same public hierarchy are brought together in one virtual cube. There are now several usages of the same public hierarchy. Which one to use? It depends upon what measure we are currently using. We should use the hierarchy usage for the fact table which underlies the measure. That is what determines the foreign key to join on. A HierarchyUsage is identified by (hierarchy.sharedHierarchy, factTable) if the hierarchy is shared, or (hierarchy, factTable) if it is private.
    Since:
    21 March, 2002
    Author:
    jhyde