This script displays information on all database sessions with the username column displayed as a heirarchy if locks are present. It is assumed that the user running the script has access to the V$ views.
-- Description : Displays information on all database sessions with the username
SET LINESIZE 500
SET PAGESIZE 1000
COLUMN username FORMAT A15
COLUMN machine FORMAT A25
COLUMN logon_time FORMAT A20
SELECT LPAD(' ', (level-1)*2, ' ') || NVL(s.username, '(oracle)') AS username,
s.osuser,
s.sid,
s.serial#,
s.lockwait,
s.status,
s.module,
s.machine,
s.program,
TO_CHAR(s.logon_Time,'DD-MON-YYYY HH24:MI:SS') AS logon_time
FROM v$session s
CONNECT BY PRIOR s.sid = s.blocking_session
START WITH s.blocking_session IS NULL;
SET PAGESIZE 14