How to fix the Oracle error XOQ-01424: Hierarchy must be declared skip-level, because it contains level expressions that can be null.?

In this post, you’ll learn more about the Oracle ErrorXOQ-01424: Hierarchy must be declared skip-level, because it contains level expressions that can be null. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

XOQ-01424: Hierarchy must be declared skip-level, because it contains level expressions that can be null.

Reason for the Error XOQ-01424: Hierarchy must be declared skip-level, because it contains level expressions that can be null.

Cause: One of the MtmLevelMaps of an MdmHierarchy was defined by a level expression that can be null. Hierarchies containing levels with nullable expressions must be declared skip-level.

How to fix the Error XOQ-01424: Hierarchy must be declared skip-level, because it contains level expressions that can be null. ?

You can fix this error in Oracle by following the below steps

Action: Either set the MtmHierarchyMap to be skip-level using the OLAP Metadata API, or declare the expression for the MtmLevelMap as not nullable.