Query to get the expense owner's employee identification number in Expense Report DFF

Summary:

Hello,

We need to create a DFF to retrieve the expense owner's identification number in the case where the expense is delegated to another person. Anybody can share the query?

We used this query but this only retrieve the creator's details not the owner details.

select * from PER_NATIONAL_IDENTIFIERS
where person_id in (SELECT hrc_session_util.get_user_personid FROM dual)