15.00 - Constructor Methods - Teradata Database

Teradata Database SQL Data Definition Language Detailed Topics

prodname
Teradata Database
vrm_release
15.00
category
Programming Reference
featnum
B035-1184-015K

Constructor Methods

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 SQL Functions, Operators, Expressions, and Predicates 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')