Re: LOGON/LOGOFF Trigger Issue

What happens is that you have a database wide logon trigger, not just a trigger on scott.schema which needs an execution context. A pseudo session with a SID=0 is established and the trigger is executed. Personally, I would use auditing ("audit session" or "audit session by scott"), not a database trigger.

On 2004.01.11 12:54, Sami wrote:
> Hi
>
> I am trying to maintain currently connected users list using LOGON/LOGOFF
> triggres.
> But I am experiencing some unexpected behavior for SYS user.
>
>
> CREATE OR REPLACE TRIGGER SCOTT.LOGON_TRIG
> AFTER LOGON ON DATABASE
> BEGIN
> insert into logon_info
> values(SYS_CONTEXT('USERENV','SESSIONID'),SYS_CONTEXT('USERENV','INSTANCE'),
> SYS_CONTEXT('USERENV','HOST'),USER,SYS_CONTEXT('USERENV',
> 'session_user'),sysdate);
> END;
> /
>
> CREATE OR REPLACE TRIGGER SCOTT.LOGOFF_TRIG
> BEFORE LOGOFF ON DATABASE
> BEGIN
> delete logon_info where SESSIONID_NUMBER=SYS_CONTEXT('USERENV','SESSIONID');
> END;
> /
>
> ================================================================
> Initiated TWO session using SYS and SCOTT in a separate window
> ================================================================
>
> SQL> desc scott.logon_info
> Name Null? Type
> ----------------------------------------- -------- -----------------------
> SESSIONID_NUMBER VARCHAR2(50)
> INSTANCE_NUMBER VARCHAR2(36)
> HOST_NAME VARCHAR2(36)
> USER_NAME VARCHAR2(36)
> SESSION_USER VARCHAR2(36)
> LOGONDATE DATE
>
>
> SQL>set head off
> SQL> set time on
> 19:01:01 SQL> select * from loon_info;
>
> 0
> 1
> DELTA\SSEERANG
> SYS
> SYS
> 10-JAN-04
>
> 1411
> 1
> DELTA\SSEERANG
> SCOTT
> SCOTT
> 10-JAN-04
>
>
> ===========================================================================
> BOTH users(SCOTT,SYS) remain connected but SESSIONID 0 disappeared.
> ============================================================================
> 19:07:05 SQL> /
>
> 1411
> 1
> DELTA\SSEERANG
> SCOTT
> SCOTT
> 10-JAN-04
>
>
> SQL>
>
>
> What could be the reason?
>
> Thanks
> Sami
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Sami
> INET: jaysingh1_at_optonline.net
>
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-- 
Mladen Gogala
Oracle DBA
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Mladen Gogala
  INET: mgogala_at_adelphia.net

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