How to fix the Oracle error ORA-22908: reference to NULL table value?

In this post, you’ll learn more about the Oracle ErrorORA-22908: reference to NULL table value with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-22908: reference to NULL table value

Reason for the Error ORA-22908: reference to NULL table value

The evaluation of the THE subquery or nested table column resulted in a NULL value implying a NULL table instance. The THE subquery or nested table column must identify a single non-NULL table instance.

How to fix the Error ORA-22908: reference to NULL table value ?

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

Ensure that the evaluation of the THE subquery or nested table column results in a single non-null table instance. If happening in the context of an insert statement where the THE subquery is the target of an insert, then ensure that an empty nested table instance is created by updating the nested table column of the parent table’s row specifying an empty nested table constructor.