DBMS_LOCK 권한 없이 Oracle에서 절전 기능을 구현하는 방법은 무엇입니까?

CREATE OR REPLACE FUNCTION MYSCHEMA.ALTERNATIVE_SLEEP
(
  TIME_  IN  NUMBER
)
RETURN INTEGER IS
  IN_TIME INT; -- seconds to sleep
  v_now DATE; -- current date and time

  BEGIN
    SELECT SYSDATE -- Get the current date and time
      INTO v_now
      FROM DUAL;

    LOOP -- Sleep until the specified time has elapsed
      EXIT WHEN v_now + (IN_TIME * (1/86400)) <= SYSDATE; -- Break from the loop when the target time is reached
      END LOOP;

    RETURN 1; -- Dummy return value to avoid syntax errors
    EXCEPTION
      WHEN OTHERS THEN
        RAISE;
        RETURN 1; -- Dummy return value to avoid syntax errors
    END ALTERNATIVE_SLEEP;