获取默认文件名SQL如下：
计算
安全
数据库
网络和加速
企业服务
--第1种
SELECT u_Dump.Value || '/' || Lower(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');
--第2种
SELECT d.Value || '/' || Lower(Rtrim(i.Instance, Chr(0))) || '_ora_' ||
p.Spid || '.trc' AS "trace_file_name"
FROM (SELECT p.Spid
FROM V$mystat m, V$session s, V$process p
WHERE m.Statistic# = 1
AND s.Sid = m.Sid
AND p.Addr = s.Paddr) p,
(SELECT t.Instance
FROM V$thread t, V$parameter v
WHERE v.Name = 'thread'
AND (v.Value = 0 OR t.Thread# = To_Number(v.Value))) i,
(SELECT VALUE
FROM V$parameter
WHERE NAME = 'user_dump_dest') d;eg:
/data03/DEV4/db/9.2.0/admin/DEV4_mistest/udump/dev4_ora_9359834.trc
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