How to fix the Oracle error XOQ-02527: The unique key attributes “string” and “string” are on different levels of a primary dimension but are mapped to the same expression.?

In this post, you’ll learn more about the Oracle ErrorXOQ-02527: The unique key attributes “string” and “string” are on different levels of a primary dimension but are mapped to the same expression. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

XOQ-02527: The unique key attributes “string” and “string” are on different levels of a primary dimension but are mapped to the same expression.

Reason for the Error XOQ-02527: The unique key attributes “string” and “string” are on different levels of a primary dimension but are mapped to the same expression.

Cause: Two different unique key attributes on different levels of a primary dimension were mapped to the same expression. Such mappings are not allowed if the dimension is part of a query-rewrite-enabled cube.

How to fix the Error XOQ-02527: The unique key attributes “string” and “string” are on different levels of a primary dimension but are mapped to the same expression. ?

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

Action: Uniquely map the unique key attributes or create the cube without a REWRITE materialized view.