Query for HRMS supervisor hierarchy

Question

I need to list all people in a given person's supervisor hierarchy. The following query returns me a person's direct manager and whether or not that person is an officer. I've tried using connect by to return all supervisors in the person's hierarchy but cannot get it working thus far. Any idea what I am doing wrong with the connect by?
SELECT papf.employee_number,
papf.person_id,
papf.full_name,
ppg.segment1 officer_flag,
NVL(spapf.full_name,'NONE') supervisor_name,
spapf.person_id,
spapf.email_address
FROM per_all_people_f papf,
per_all_assignments_f paaf,
pay_people_groups ppg,
per_all_people_f spapf
WHERE papf.person_id = :person_id
AND papf.person_id = paaf.person_id
AND SYSDATE BETWEEN papf.effective_start_date AND papf.effective_end_date
AND SYSDATE BETWEEN paaf.effective_start_date AND paaf.effective_end_date
AND SYSDATE BETWEEN spapf.effective_start_date(+) AND spapf.effective_end_date(+)
AND apps.xxx_person_type.is_employee(SYSDATE, papf.person_id) = 'TRUE'
AND paaf.assignment_type in ('E','C')
AND paaf.supervisor_id = spapf.person_id ( + )
AND paaf.people_group_id = ppg.people_group_id
AND paaf.primary_flag = 'Y'
--order by to_number(employee_number)
--CONNECT BY PRIOR paaf.supervisor_id = spapf.person_id
;

Answer 1

Thanks for the response.
I tried the following using a variety of employee numbers in the hierarchy, sysdate and level < 100. I got ORA-01436: CONNECT BY loop in user data and it seemed to think the reference to per_all_assignments_f to be the issue, but not sure.
What am I doing wrong?
SELECT papf.employee_number,
papf.person_id,
papf.full_name,
ppg.segment1 officer_flag, --executive flag for officers (Y is officer, N is not)
NVL(spapf.full_name,'NONE') supervisor_name,
spapf.person_id supv_person_id
FROM per_all_people_f papf,
per_all_people_f spapf,
per_all_assignments_f paaf,
pay_people_groups ppg
WHERE papf.person_id = paaf.person_id
AND :p_eff_date BETWEEN papf.effective_start_date AND papf.effective_end_date
AND :p_eff_date BETWEEN paaf.effective_start_date AND paaf.effective_end_date
AND :p_eff_date BETWEEN spapf.effective_start_date(+) AND spapf.effective_end_date(+)
AND xxx_person_type.is_employee(:p_eff_date, papf.person_id) = 'TRUE'
AND paaf.assignment_type in ('E','C')
AND paaf.supervisor_id = spapf.person_id (+)
AND paaf.people_group_id = ppg.people_group_id
AND paaf.primary_flag = 'Y'
START WITH papf.employee_number = :p_emp_num --emp num of employee or top level supervisor?
CONNECT BY PRIOR spapf.employee_number = papf.employee_number AND LEVEL < :p_level
ORDER BY 1 DESC
;