Enable SQL Tracing for Session

Question

Hi,
I know how to enable SQL tracing for a session created either through SQL*Plus or like similar tool, but I want to explore is there any way to can we enable sql tracing for a single session which is connected to database through an application.
ssome time for testing purpose we have a requirement to enable tracing for that user which run batch Job. Now that particular user gets connected to database through application and i want to enable tracing right at that moment. How can I accomplish it.
Regards,
Ababsi

Answer 1

If you don't want to identify database session you can try to create a logon trigger to enable tracing for all database sessions created by a specific Oracle user account. In the following example you need to replace UWCLASS with the Oracle user account for which you want to trace sessions:
CREATE OR REPLACE TRIGGER trace_trig
AFTER LOGON
ON DATABASE
DECLARE
sqlstr VARCHAR2(200) := 'ALTER SESSION SET EVENTS ''10046 TRACE NAME CONTEXT FOREVER, LEVEL 12''';
BEGIN
  IF (USER = 'UWCLASS') THEN
    execute immediate sqlstr;
  END IF;
END trace_trig;
/Reference:
http://psoug.org/reference/system_trigger.html
If you want to identify database session you need to query V$SESSION to retrieve SID and SERIAL# of the session you want to trace and then you can use DBMS_MONITOR. See examples in http://www.oracle-base.com/articles/10g/SQLTrace10046TrcsessAndTkprof10g.php
Edited by: P. Forstmann on 15 janv. 2011 11:07