---

SELECT
    n.nspname AS schema_name,
    p.proname AS function_name,
    p.oid
FROM pg_proc p
JOIN pg_namespace n
    ON n.oid = p.pronamespace
WHERE
       p.prosrc ILIKE '%initial_payment%'
    OR p.prosrc ILIKE '%current_payment%'
ORDER BY
    n.nspname,
    p.proname;