$ ./account2user 123

SQL*Plus: Release 10.1.0.3.0 - Production on Fri Nov 25 11:58:22 2005

Copyright (c) 1982, 2004, Oracle.  All rights reserved.

Error accessing PRODUCT_USER_PROFILE
Warning:  Product user profile information not loaded!
You may need to run PUPBLD.SQL as SYSTEM

Connected to:
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, Real Application Clusters, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production

old   1: select username from ods.w_single_account_image where account_id=&1
new   1: select username from ods.w_single_account_image where account_id=123

USERNAME
--------------------------------------------------
mr_foobar

Disconnected from Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, Real Application Clusters, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production