Killing Locked Session in oracle database.

----------------query---------------
SELECT
    O.OBJECT_NAME,
    S.SID,
    S.SERIAL#,
    P.SPID,
    S.PROGRAM,
    SQ.SQL_FULLTEXT,
    S.LOGON_TIME
FROM
    V$LOCKED_OBJECT L,
    DBA_OBJECTS O,
    V$SESSION S,
    V$PROCESS P,
    V$SQL SQ
WHERE
    L.OBJECT_ID = O.OBJECT_ID
    AND L.SESSION_ID = S.SID
    AND S.PADDR = P.ADDR
    AND S.SQL_ADDRESS = SQ.ADDRESS;

-------------------Execute Script---------------------

BEGIN
FOR C IN (SELECT S.SID SID, S.SERIAL# SERIAL FROM V$LOCKED_OBJECT L, V$SESSION S WHERE L.SESSION_ID = S.SID) LOOP
   EXECUTE IMMEDIATE ('ALTER SYSTEM KILL SESSION ''' || C.SID || ',' || C.SERIAL || '''');
END LOOP;
END;


 ------------------killing connected session-------------------
DECLARE
   lc_username   VARCHAR2 (32) := 'USER_NAME';
BEGIN
   FOR ln_cur IN (SELECT sid, serial# FROM v$session WHERE username = lc_username)
   LOOP
      EXECUTE IMMEDIATE ('ALTER SYSTEM KILL SESSION ''' || ln_cur.sid || ',' || ln_cur.serial# || ''' IMMEDIATE');
   END LOOP;
END;
/