Oracle database Proxy Authentication Example

SQL> create user c##guest identified by password;

User created.

SQL> alter user c##donghua grant connect through c##guest;

User altered.

oracle@solaris:~$ sqlplus c##guest[c##donghua]/password@orclcdb

SQL*Plus: Release 12.1.0.1.0 Production on Mon Jun 9 23:37:29 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Last Successful login time: Mon Jun 09 2014 23:37:11 +08:00

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show user;
USER is "C##DONGHUA"

SQL> col session_user for a20
SQL> col proxy_user for a20
SQL> select sys_context('USERENV','SESSION_USER') session_user,
  2  sys_context('USERENV','PROXY_USER') proxy_user from dual;

SESSION_USER         PROXY_USER
-------------------- --------------------
C##DONGHUA           C##GUEST