Oracle - Is there any way I can get around SELECT INTO on PL/SQL block - sql

Question

I am trying to create a trigger, which automatically updates a student's application state when the application status row in the application table changes. I have been browsing the web for a little over an hour or so now and despite finding a potential work around using EXECUTE IMMEDIATE I cannot achieve my desired result (EXECUTE IMMEDIATE was causing an unbound variable error).
Trigger code
CREATE OR REPLACE TRIGGER trg_applications
BEFORE INSERT OR UPDATE ON applications FOR EACH ROW
BEGIN
IF UPDATING THEN
/* If the status is ACCEPTED, then approve the students application */
SELECT CASE
WHEN get_status(:NEW.status_id) =
LOWER('Applicant Accepted Offer')
THEN student_accept_offer( :NEW.student_id )
END
FROM status;
END IF;
END;
The get status method returns a VARCHAR2 to check whether the new status matches the condition, if so I want to update the student_approved row using the autonomous_transaction below.
student_accept_offer code
CREATE OR REPLACE FUNCTION student_accept_offer( this_stu_id NUMBER )
RETURN VARCHAR2 IS
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
UPDATE students
SET students.student_on_placement = 1
WHERE students.student_id = this_stu_id;
COMMIT;
RETURN 'Student has approved application';
END student_accept_offer;
This function works as intended when I test it outside of my trigger, however when it is embedded in the trigger an PLS-00428 error gets thrown. Could anyone point me in the right direction as to how can I work around this, to allow me to have this function fire automatically on an update if the status matches.
Thanks for your time
EDIT - Tables I am referencing

Answer 1

Changing your code slightly to remove the SELECT statement (as it seems unnecessary) then does this work?
CREATE OR REPLACE TRIGGER trg_applications
BEFORE INSERT OR UPDATE ON applications FOR EACH ROW
BEGIN
IF UPDATING THEN
/* If the status is ACCEPTED, then approve the students application */
IF get_status(:NEW.status_id) = 'applicant accepted offer' THEN
student_accept_offer( :NEW.student_id );
END IF;
END IF;
END;