[oracle] Oracle: How to find out if there is a transaction pending?

I'm looking for a way to find out if there are uncommited INSERT, UPDATE or DELETE statements in the current session. One way would be to check v$lock with the current sid, but that requires read access to v$lock, which is a problem if the DBA doesn't want to grant it. Any other ways (other than keeping track of all database commands issued by the application)?

SELECT * FROM V$TRANSACTION
WHERE STATUS='ACTIVE';

See: http://forums.oracle.com/forums/thread.jspa?threadID=691061

Use the query below to find out pending transaction.

If it returns a value, it means there is a pending transaction.

Here is the query:

select dbms_transaction.step_id from dual;

References:
http://www.acehints.com/2011/07/how-to-check-pending-transaction-in.html http://www.acehints.com/p/site-map.html

Also see...

How can I tell if I have uncommitted work in an Oracle transaction?

The easiest and most reliable solution is to try and start a transaction and see it if succeeds. If some code already started a transaction but has not yet issued any DML, then the V$TRANSACTION view won't show anything.

In this example below, I handle the exception to raise a user-defined application error. To defer to an existing exception handler, just do a SET TRANSACTION and then immediately COMMIT to undo it.

DECLARE
    transaction_in_progress EXCEPTION;
    PRAGMA EXCEPTION_INIT(transaction_in_progress, -1453);
BEGIN
    SET TRANSACTION NAME 'CHECK_FOR_TRANSACTION_ALREADY_SET';
    COMMIT; -- end transaction
EXCEPTION
    WHEN transaction_in_progress THEN
        RAISE_APPLICATION_ERROR(-20000,'Transaction is already in progress');
END;
/

This is the query I normally use,

select s.sid
      ,s.serial#
      ,s.username
      ,s.machine
      ,s.status
      ,s.lockwait
      ,t.used_ublk
      ,t.used_urec
      ,t.start_time
from v$transaction t
inner join v$session s on t.addr = s.taddr;

Matthew Watson can be modified to be used in RAC

select t.inst_id 
       ,s.sid
      ,s.serial#
      ,s.username
      ,s.machine
      ,s.status
      ,s.lockwait
      ,t.used_ublk
      ,t.used_urec
      ,t.start_time
from gv$transaction t
inner join gv$session s on t.addr = s.taddr;