17.10 - CONSTRAINT - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1144-171K
Language
English (United States)

Unnamed constraints are not assigned system-generated names.

constraint_name
Optional name for a constraint.
For information about naming database objects, see Teradata Vantage™ - SQL Fundamentals, B035-1141.
The CONSTRAINT constraint_name specification is mandatory for named constraints for UNIQUE, PRIMARY KEY, FOREIGN KEY, and CHECK when those constraints are named, and applies to column-level and table-level constraints.
It does not apply to row-level security constraints. See row_level_security_constraint_name CONSTRAINT later in this table.
Constraint names must conform to the rules for Vantage object names and be unique among all other constraint, primary index, and secondary index names specified in the table definition. For a description of Vantage identifiers and a list of the characters they can contain, see Teradata Vantage™ - SQL Fundamentals, B035-1141.
See Teradata Vantage™ - Temporal Table Support, B035-1182 and Teradata Vantage™ - ANSI Temporal Table Support, B035-1186 for information about the constraints that can be defined for temporal tables.