The database automatically creates system-level database users during initial system setup:
- User DBC (the master administrative user) performs the initial steps for database setup and maintains the data dictionary tables.
- PUBLIC, the default user identity, has a set of privileges that are available to all users, primarily the SELECT privilege on most Data Dictionary views.
- Other system-generated users, such as SystemFE, perform automated system-level tasks in the database. You can optionally configure system users to perform additional tasks.
Depending on the release, installing or upgrading may automatically create a new user group and user that is granted access permissions to run certain OS-level processes required by Teradata Vantage. You may need to manually grant additional OS permissions to the user and to other administrative users. Also see Working with OS-Level Security Options.