How to fix the Oracle error ORA-18101: XUST0002 – Non-updating expression in a wrong position?

In this post, you’ll learn more about the Oracle ErrorORA-18101: XUST0002 – Non-updating expression in a wrong position with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-18101: XUST0002 – Non-updating expression in a wrong position

Reason for the Error ORA-18101: XUST0002 – Non-updating expression in a wrong position

A non-updating expression other than an empty expression ( ) or a call to the fn:error function was used in one of the following positions:

– The MODIFY clause of a TRANSFORM expression.

– The top-level expression in the body of a function declaration in which the keyword UPDATING is specified.

How to fix the Error ORA-18101: XUST0002 – Non-updating expression in a wrong position ?

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

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