16.20 - Maintaining Foreign Key Integrity - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Detailed Topics

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1184-162K
Language
English (United States)

Teradata Database verifies that the structure of columns defined as foreign keys, or referenced by foreign keys, is not changed in any manner that violates the rules for the definition of a foreign key constraint.

An ALTER TABLE (or DROP INDEX) request attempting to change the structure of such a column aborts and causes the system to return an error to the requestor.

Teradata Database verifies that a table referenced by another is not dropped. Before dropping the table, you must perform an ALTER TABLE request to drop the foreign key reference.