15.10 - Session Constraint Values in OVERRIDE Sessions - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K

The user conducting a session that accesses an RLS table may need OVERRIDE privileges if:

  • The CONSTRAINT object associated with a constraint column in the table does not define a UDF for the SQL operation.
  • Accessing table rows or setting row level constraint values cannot be done effectively with the assigned user defaults.
For additional information on OVERRIDE privileges, see “Working with Constraint OVERRIDE Privileges” in Security Administration, B035-1100.

When an OVERRIDE is in effect for a session:

  • The OVERRIDE privileges bypasses enforcement of the affected UDFs.
  • If the operation is an INSERT or UPDATE, the user SQL must supply the value(s) to be entered into the named constraint column in the table, either using data from the source table or values specified in a SET SESSION CONSTRAINT statement.
Loading tables with non-hierarchical constraints in an OVERRIDE session requires special handling. See Example: Loading Tables with User OVERRIDE Privileges.