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Session identifier

ppgg
ppgg asked
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Last Modified: 2012-05-04
Which is the number that identifies uniquely an Oracle Session?
How can an user know it?

I know the session id SID and SERIAL# on table V$SESSION.
This two attributes are necessary to KILL a session.
How can an user know his sesion id SID and SERIAL#?

Besides, Auditing session id exists in the same table too (AUDSID column).
An user can know his AUDSID with: SELECT USERENV('SESSIONID') FROM DUAL

What's the different between AUDSID and (SID,SERIAL#)?

Thanks!
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Commented:
Hi ppgg,

First of all let me tell you that you have a funny user name.

The SID identifies the session; the SERIAL# identifies the session serial number and it is used to identify uniquely a session's objects; also guarantees that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.

On the other hand, AUDSID represents the auditing session ID.

If you want to obtain some information about the session you can do a join between the V$SESSION and DUAL tables. Let me give you an example:

Suppose that I want to know the username for my current session (username means the client name not the oracle username):

SELECT OSUSER FROM V$SESSION WHERE AUDSID = ( SELECT USERENV('SESSIONID') FROM DUAL);

I hope this helps you. If not please do not hesitate to contact me directly to my e-mail address: jmponcemartinez@hotmail.com

Regards,

Juan Manuel Ponce Martinez
DBA - Bridas S.A.P.I.C.
Buenos Aires - Argentina

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