Is it possible to edit info from V$SESSION

Question

I have to write something to the CLIENT_INFO field of whatever table the V$SESSION view gets its data from everytime a user connects to a database. The script should be server-side. Is this possible?

Answer 1

I think you can try something similar;
SQL> create trigger logonuser
  2  after logon on database
  3  DECLARE
  4   machinename VARCHAR2(64);
  5  osuserid    VARCHAR2(30);
  6  sid NUMBER;
  7  serial# NUMBER;
  8  program VARCHAR2(100);
  9  CURSOR c1 IS
10  SELECT osuser, machine , sid , serial# , program
11  FROM v$session WHERE audsid = USERENV( 'sessionid' );
12  BEGIN
13  OPEN c1;
14  FETCH c1 INTO osuserid, machinename, sid , serial# , program ;
15  INSERT INTO test.LOGTABLE VALUES ( 'LOGON', SYSDATE,
16  USER, osuserid, machinename , sid , serial#, program);
17  CLOSE c1;
18  COMMIT;
19  END;
20  /
SQL> conn system
Enter password:
Connected.
SQL> select * from LOGTABLE
  2  where schema='SYSTEM';
EVENT      TIMESTAMP SCHEMA
OSUSERID
MACHINENAME                                                             SID
   SERIAL#
PROGRAM
LOGON      29-JAN-08 SYSTEM
testdev
testvoprsR6                                                               159
EVENT      TIMESTAMP SCHEMA
OSUSERID
MACHINENAME                                                             SID
   SERIAL#
PROGRAM
         5
sqlplus@ testvoprsR6 (TNS V1-V3)Anyway if you identify the source from where the column CLIENT_INFO of V$SESSION brings information then that is through DBMS_APPLICATION_INFO.SET_CLIENT_INFO procedure.
V$SESSION
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/dynviews_2088.htm#sthref3986
DBMS_APPLICATION_INFO
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_appinf.htm#sthref490
Please also mention your complete database version.
Hope it is useful.
Adith