Restrictions to Using Structured UDTs | CREATE TYPE | Teradata Vantage - 17.10 - Constructor Methods - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Detailed Topics

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1184-171K
Language
English (United States)

A structured UDT can have more than one constructor method, each of which provides a different initialization option. Constructors have the same method name; however, their parameter lists are different, meaning that their method signatures are different.

The following is an example of a constructor method for the structured type address:

CREATE TYPE address
...
CONSTRUCTOR METHOD address(VARCHAR(20), CHARACTER(5) )
RETURNS address
SELF AS RESULT
LANGUAGE C
DETERMINISTIC

This constructor method takes two character strings as input and uses them to initialize the attributes of the address structured type.

You can invoke constructor methods using the NEW syntax (see Teradata Vantage™ - SQL Functions, Expressions, and Predicates, B035-1145 for details).

The following bullets briefly summarize how to invoke a constructor method:
  • NEW syntax:
    NEW structuredTypeName( ... )
  • NEW example:
    NEW address('10795 Via Del Campo', '92127')