To access the database, a user must submit a logon request. The request must specify some or all of the following elements, depending on system configuration and security policy:
- Authentication mechanism
- Account string
- Domain or Realm
When a user submits a logon string, the mechanism (user-specified, or the default) authenticates the user and establishes a session based on user privileges. If the logon is successful, Teradata Database associates the username with a unique session number, under which the session runs until the user logs off.