standby database 中的登录触发器 导致 ORA-00604 ORA-16000

前段事件公司dba说登录 standby库 用非dba 身份进入时 报出ORA-00604 ORA-16000错误，经过核查，发现是登录触发器的原因，现将该错复现如下：

在primary库中存在登录触发器 如下：

conn milia/xxxx

create table session_history
(
USERNAME varchar2(20),
SID number,
AUDSID number,
OSUSER varchar2(30),
ACTION varchar2(100),
LOGIN_TIME date,
LOGOFF_TIME date,
IP varchar2(20),
TERMINAL varchar2(30),
PROGRAM varchar2(100)
)

/

CREATE OR REPLACE TRIGGER LOGON_HISTORY
AFTER LOGON ON DATABASE --WHEN (USER='EQSP') --ONLY FOR USER 'EQSP'
BEGIN
insert into session_history
select username,sid,AUDSID,OSUSER,ACTION,SYSDATE,null,SYS_CONTEXT('USERENV','IP_ADDRESS'),TERMINAL,PROGRAM
from v$session s
where audsid = userenv( 'sessionid' )
and s.USERNAME NOT IN ('SYSTEM','SYS','REPADMIN')
AND S.USERNAME IS NOT NULL;
END;

/

standy database以只读方式打开

conn milia/xxxx

连接成功了（因为milia是dba权限的用户，即使报错也可以绕开登录触发器的错误登录系统），但是查看alert日志，报错误如下：

Errors in file /opt/ora9/product/9.2/rdbms/log/test_ora_2410.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-16000: database open for read-only access
ORA-06512: at line 2
***Warning - Executing transaction without active Undo Tablespace

trace 登录过程

alter session set events '10046 trace name context forever ,level 12'

conn milia/miniyal

alter session set events '10046 trace name context off' ;

查看trace文件

/opt/ora9/product/9.2/rdbms/log/test_ora_2410.trc
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
ORACLE_HOME = /opt/ora9/product/9.2
System name: Linux
Node name: localhost.localdomain
Release: 2.4.21-4.EL
Version: #1 Fri Oct 3 18:13:58 EDT 2003
Machine: i686
Instance name: test
Redo thread mounted by this instance: 1
Oracle process number: 10
Unix process pid: 2410, image: oracle@localhost.localdomain (TNS V1-V3)

*** SESSION ID:(9.5) 2008-10-29 21:49:33.801
Skipped error 604 during the execution of MILIA.LOGON_HISTORY
*** 2008-10-29 21:49:33.802
ksedmp: internal or fatal error
ORA-00604: error occurred at recursive SQL level 1
ORA-16000: database open for read-only access
ORA-06512: at line 2

发现确实是登录触发器的问题