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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Logon trigger isn't restricting logon
What version of Oracle are you on? When Oracle first introduced Database
Event Triggers the raise application error routine could not be used to kill
the logon. Instead you had to save the sid and serial# for the session in a
table and launch another session (dbms_job or daemon process) that read the
table and performed the kill operation. This restriction was lifted later
(probably with ver 9).
HTH -- Mark D Powell --
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]
On Behalf Of Hostetter, Jay M
Sent: Wednesday, March 02, 2005 9:29 AM
To: oracle-l_at_freelists.org
Subject: Logon trigger isn't restricting logon
I'm not quite sure what I'm missing here. I created a logon trigger, did some debugging and I confirmed that it does indeed fire. The problem seems to be with RAISE_APPLICATION_ERROR. This trigger is supposed to prevent certain connections from occuring. Instead, a trace file is generated with the following:
Skipped error 604 during the execution of JMH.ON_LOGON
*** 2005-03-02 09:19:41.326
ksedmp: internal or fatal error
ORA-00604: error occurred at recursive SQL level 1 ORA-20001: You are not allowed to login ORA-06512: at line 8
Now, from what I can see, this behavior is expected if the user has ADMINISTER DATABASE TRIGGER or ALTER ANY TRIGGER (Note 265012.1). I think this also happens if you have certain roles (this user does not have any special roles).=20 So I'm trying to figure out why the error is skipped and login is allowed. Here is my trigger:
CREATE OR REPLACE TRIGGER on_logon
AFTER LOGON
ON jmh.schema
declare
hname varchar2(50);
BEGIN
select sys_context('userenv','host') into hname from dual; IF upper(hname)
like '%TESTBOX%' THEN
RAISE_APPLICATION_ERROR(-20001, 'You are not allowed to login'); END IF; END; / Any help would be appreciated.
Thank you,
Jay
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