select u_dump.value||'/'||db_name.value||'_ora_'||v$process.spid||nvl2(v$process.traceid,'_'||v$process.traceid,null)||'.trc' "trace file" from v$parameter u_dump cross join v$parameter db_name cross join v$process join v$session on v$process.addr=v$session.paddr where u_dump.name='user_dump_dest' and db_name.name='db_name' and v$session.audsid=sys_context('userenv','sessionid');

註釋：select後的字串組成句子再執行的例子，那是字串裡有程式包的存在。

檢視當前使用者的trace file路徑:

select p.value || '\' || t.instance || '_ora_' || ltrim(to_char(p.spid,'fm99999')) || '.trc'

    from v$process p, v$session s, v$parameter p, v$thread t

    where p.addr = s.paddr and s.audsid = userenv('sessionid') and p.name = 'user_dump_dest';

http://logicgate.iteye.com/blog/419292