How to revoke everything from a user when opening a new session.

Question

HI,
I am using oracle 10g Express Edition and SQL Developer.
I have 2 user, 2 database connections in my SQL Developer.
First user is Oracle and its database connection is called TCF.
Second user is SMITH and its database connection is called TCF_SMITH.
Oracle user has privileges to do anything.
SMITH user has no privileges except for CREATE SESSION.
What I am trying to achieve is assign a user to a role (this role will have grants to select, insert , update from tables) for the current session (this step is successful), and then revoke
The role from that user (set it back to its default/or revoke everything from it) if opening another session, or session has been terminated (what I am trying to achieve).
From TCF I was able to do the following:
CREATE synonym SMITH.EMP_IOD FOR EMP_IOD;
CREATE ROLE TCF_I;
GRANT SELECT, INSERT, UPDATE ON EMP_IOD TO TCF_I;
GRANT TCF_I TO SMITH;In TCF_SMITH
SMITH has the same privileges as TCF_I.
so, smith now can select, insert , and update from EMP_IOD table.
If I open another TCF_SMITH session, and select * from EMP_IOD I should not be able to see any of the records.
I am trying to make this session base only. Unfortunately when opening another session I am able to select, update and insert records in the new session.
Is there a way to make this session based ?
How can I revoke everything from user SMITH from TCF connection ?
Thanks,

Answer 1

Oh My Good Lord!
Rooney,
What are you attempting to do ?
In programming anything can be achieved, but there are speicifc tools to solve specific problems .
I think you are trying to use fork to paint a wall* (If painting the wall indeed is your requirement).
The "need" as you say...
+The need for this is to grant the user different roles each time the user logs in.
for example I can log in 5 different time in one week with different role each time.
Moday I could have access to X,Y,Z,
Tuesday I could have access to X,A,B
Wednesday I could have access to A,B,C.+
... is to solve WHAT PROBLEM?
Please describe your original requirement , not what you think should be the solution/tool to satisfy the requirement.
In your previous thread you "solved" privilege/role problem by creating SYNONYM. That does not compute at all.
Re: database roles seems like its not working for me - your help is appreciated
Think about it. We are here to help each other as best we can.
Please read more* about Oracle capabilities and "tools" it provides.
http://tahiti.oracle.com/
Especially the Oracle Concepts Guide ...
http://download.oracle.com/docs/cd/B14117_01/server.101/b10743.pdf
Also, please take time to respond as "helpfully" as possible. each response from you should take you closer to the solution.
Hopefully, your original requirement will be solved.
vr,
Sudhakar B.