You can grant OVERRIDE privileges using the GRANT (SQL form) statement. For example:
GRANT OVERRIDE [sql_statement_type ... [, sql_statement_type]] CONSTRAINT [constraint_name ... [, constraint_name]] ON [object_name] TO user_name ...[, user_name]|role_name...[,role_name]
||The SQL statement type(s) for which OVERRIDE privileges are granted, INSERT, SELECT, UPDATE, or DELETE.
If no SQL statement is specified, the OVERRIDE privilege is granted for all SQL statement types.
||The row level security constraints that are subject to the OVERRIDE privilege(s).
If no security constraint name is specified, the keyword CONSTRAINT is still required, and OVERRIDE privileges apply to all security constraints for the object specification.
|[object_name]||The object on which the OVERRIDE is granted.
If no object is specified, the privileges apply to all database objects except database DBC objects.
||The user(s) or role(s) to which the OVERRIDE privileges are granted.
OVERRIDE privileges cannot be granted to PUBLIC.
The named role can be a database role or an external role.