How to fix the Oracle error QSM-02201: PCT FAST REFRESH is not possible if there is a self join or self cartesian product in query?

In this post, you’ll learn more about the Oracle ErrorQSM-02201: PCT FAST REFRESH is not possible if there is a self join or self cartesian product in query with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02201: PCT FAST REFRESH is not possible if there is a self join or self cartesian product in query

Reason for the Error QSM-02201: PCT FAST REFRESH is not possible if there is a self join or self cartesian product in query

The capability in question was not supported because the materialized view query contained self join of self cartesian product in the query.

How to fix the Error QSM-02201: PCT FAST REFRESH is not possible if there is a self join or self cartesian product in query ?

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

Rephrase the query to avoid the use of self joins or self cartesian product in the query.