Query to find out Sid details of form sessions of specific front end user

Query to find out Sid details of form sessions of specific front end user

select /*+ CHOOSE*/
s.sid,
s.serial#,
substr(s.username, 1, 6),
s.status,
substr(s.module, 1, 25),
substr(s.action, 1, 30),
s.last_call_et
from v$session s, v$process p
where p.addr = s.paddr and s.sid = nvl('&sid', s.sid) and
p.spid = nvl('&spid', p.spid) and
nvl(s.process, -1) = nvl('&ClientPid', nvl(s.process, -1)) and
s.action like '%&USER_NAME%';