17.00 - ADD CONSTRAINT name - 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)

Add a named constraint.

If you alter a nontemporal table that is defined with CHECK constraints into a temporal table with either valid time or transaction time, Vantage automatically converts the definitions for those existing constraints into CURRENT CHECK constraints.

However, if there are any existing UNIQUE or PRIMARY KEY constraints defined on the nontemporal table, the system returns an error to the requestor.

You cannot place a constraint on a column with the JSON data type.