17.00 - MODIFY CHECK (boolean_condition ) - 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)

Change an existing CHECK constraint. The table or column constraint must already exist.
 Vantage scans existing rows of the table to validate that the current values conform to the specified constraint. Otherwise, the system returns an error to the requestor and does not change the table definition.

CONSTRAINT name
Named CHECK column constraint as a table attribute. Specify a column_name on the left-hand side of boolean_condition.