Constant Mode Table UDFs | SQL External Routine Programming | Teradata Vantage - 17.10 - Constant Mode Table UDFs - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL External Routine Programming

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1147-171K
Language
English (United States)

This section provides guidelines on how to write a Java method for a table UDF that can handle an invocation from a SELECT statement that specifies constant expression input arguments.

For example, the following statement invokes table_function_1 with a constant argument:

SELECT *
FROM TABLE (table_function_1('STRING_CONSTANT'))
AS table_1;
Although this section discusses how to implement a table function that only handles constant expression input arguments, you can design a table function that can handle constant and variable input arguments. For details on how to implement a variable mode table function, see Variable Mode Table UDFs.