17.00 - Example: Adding or Dropping Security Constraint Assignments in MODIFY USER Statement - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
Release Date
September 2020
Content Type
Programming Reference
Publication ID
B035-1144-170K
Language
English (United States)
You can change security constraint assignments for a user in a MODIFY USER statement. When you specify a security constraint that is:
  • Not currently assigned to the user, the constraint is added to any existing constraints.
  • Already assigned to the user, the new specifications replace the existing specifications.
  • Already assigned to the user, followed by the keyword NULL, the constraint assignment is dropped from the user.

For example:

MODIFY USER
   Joe_Smith AS
   CONSTRAINT =  Classification_Level 
 (TopSecret, Unclassified DEFAULT),
   CONSTRAINT = Classification_Country (NULL)
   CONSTRAINT = Classification_Job (Analyst) ;

where:

Syntax Element Description
Classification_Level(TopSecret, Unclassified DEFAULT) Raises the user classification level by replacing a previously assigned Secret clearance with TopSecret, while retaining the DEFAULT Unclassified level.
Classification_Country (NULL) Drops the Classification_Country constraint assignment that was previously assigned to the user.
Classification_Job (Analyst) Adds the new hierarchical category Classification_Job, and assigns the Analyst classification level.
A new or changed security constraint assignment takes effect at the next user logon.