Hi,

Connect to the database with the user who is having DBA roles and change the password of your user in off peak hours(when user is not there). Then perform your activity and again set the original password by its value on the database.

e.g.

conn system/manager
sql>select username,password from dba_users where username='SCOTT';

USERNAME PASSWORD
------------------------------ ------------------------------
SCOTT 7304D3DD7C141581

SQL> alter user scott identified by dhaval;

User altered.


----------- Perform your activities -----------------------

SQL> alter user sdasari identified by values '7304D3DD7C141581';

User altered.

I hope this will solve your problem.

Thanks