Need help identifying the application responsible for an insert...

Question

Hi,
I'm a MSSQL guy and Oracle is still a bit mysterious to me.  I'm looking for some assistance tracking down the application in an environment which is responsible for particular inserts.
For example, suppose I have 10 different programs running and inserting values to a DB.  I need to know which one of them inserts a "0" in a particular column.
I found a trigger which will tell me the user, unfortunately these programs use a shared credential so that doesn't help me.... here's what I've got:
CREATE OR REPLACE TRIGGER check_for_zero_insert
AFTER INSERT
  ON DATA_TABLE_0001
  FOR EACH ROW
DECLARE
  v_username varchar2(10);
BEGIN
  -- Find username of person performing the INSERT into the table
  SELECT user INTO v_username
  FROM dual;
  -- Insert record into audit table
  INSERT INTO audit_table
  ( samplevalue
  sampletime,
  username )
  VALUES
  ( :sampletime,
  :samplevalue
   v_username );
END;
But again, username won't help me, I need the originating process if at all possible (either an executable name, PID, or something to identify the specific application on the other side.)

Answer 1

use this in your trigger
select sys_context('USERENV','OS_USER') ||'-' ||user  into v_username from dual;
You might need to increase the v_username data type length.
Thanks,
GPU