How to fix the Oracle error ORA-30553: The function is not deterministic?

In this post, you’ll learn more about the Oracle ErrorORA-30553: The function is not deterministic with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30553: The function is not deterministic

Reason for the Error ORA-30553: The function is not deterministic

The function on which the index is defined is not deterministic

How to fix the Error ORA-30553: The function is not deterministic ?

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

If the function is deterministic, mark it DETERMINISTIC. If it is not deterministic (it depends on package state, database state, current time, or anything other than the function inputs) then do not create the index. The values returned by a deterministic function should not change even when the function is rewritten or recompiled.