How to fix the Oracle error ORA-19158: FODC0004: invalid argument to fn:collection()?

In this post, you’ll learn more about the Oracle ErrorORA-19158: FODC0004: invalid argument to fn:collection() with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-19158: FODC0004: invalid argument to fn:collection()

Reason for the Error ORA-19158: FODC0004: invalid argument to fn:collection()

An error occurred during the processing of the XQuery expression.

How to fix the Error ORA-19158: FODC0004: invalid argument to fn:collection() ?

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

Check the detailed error message for the possible causes.