Middle-tier applications are situated between Teradata Vantage clients and the Teradata Vantage Advanced SQL Engine. A middle-tier application server that accesses Vantage must log on as a permanent database user to establish a session pool before end users can access the database through the application.
Users who access the database through a middle-tier application are subject to the security policies assigned to the application logon user, rather than the policies assigned to them as individuals. For details, see Network Security Policy.