How to fix the Oracle error ORA-28100: policy function schema string is invalid?

In this post, you’ll learn more about the Oracle ErrorORA-28100: policy function schema string is invalid with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28100: policy function schema string is invalid

Reason for the Error ORA-28100: policy function schema string is invalid

The schema was dropped after the policy associated with the function had been added to the object.

How to fix the Error ORA-28100: policy function schema string is invalid ?

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

Drop the policy and re-create it with a policy function owned by a valid user. Or re-create the user and the policy function under the new user.