How to fix the Oracle error ORA-32040: recursive WITH clause must use a UNION ALL operation?

In this post, you’ll learn more about the Oracle ErrorORA-32040: recursive WITH clause must use a UNION ALL operation with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-32040: recursive WITH clause must use a UNION ALL operation

Reason for the Error ORA-32040: recursive WITH clause must use a UNION ALL operation

A WITH clause query referred to itself (recursive) but did not use a UNION ALL operation in its definition query.

How to fix the Error ORA-32040: recursive WITH clause must use a UNION ALL operation ?

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

Rewrite the recursive WITH clause query to use a UNION ALL operation.