16.10 - Working with Logon Syntax Elements - Teradata Database

Teradata Database Security Administration

Teradata Database
Release Number
Release Date
June 2017
Content Type
Publication ID
English (United States)

Logon string information is comprised of three syntax elements:. In interactive command line environments, such as Teradata Basic Query Utility (BTEQ), logon elements appear as discrete elements.

Syntax Element Description
.logmech Specifies the authentication mechanism.

If a .logmech statement is not present, the logon uses the default security mechanism.

.logdata Optionally specifies user credentials for external authentication mechanisms.
Use of the .logdata statement is required:
  • If the user is authorized in a directory and must specify user=username , profile= profile_name , or realm= realm_name to differentiate among user mappings.
  • For certain expressions of the user name and password, for example: diruser @@password

For details, see the topics for specific logon methods that follow this one.

.logon Specifies the tdpid and user credentials for all authentication methods.

For TD2 authentication, logon can also include the user account.

Not usable for external authentication, where a user=username, profile=profile_name, or realm=realm_name specification is required. Instead, use .logdata.
For applications that do not use a command line interface, logon element syntax requirements and options still apply, but you must configure the elements as defaults, or specify them in a connection GUI, depending the application you use.

Also see Working with Logon Variations by Application.