16.20 - Java UDF Execution Environment - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL External Routine Programming

Product
Advanced SQL Engine
Teradata Database
Release Number
16.20
Release Date
April 2020
Content Type
Programming Reference
Publication ID
B035-1147-162K
Language
English (United States)

Teradata Database supports two types of servers that can execute Java external routines (UDFs and external stored procedures). The type of server that executes a Java UDF depends on whether the CREATE FUNCTION or REPLACE FUNCTION statement specifies an EXTERNAL SECURITY clause.

IF the CREATE/REPLACE FUNCTION statement … THEN Teradata Database  …
specifies the EXTERNAL SECURITY clause uses a separate secure server to execute the UDF under the authorization of a specific native operating system user established by a CREATE AUTHORIZATION or REPLACE AUTHORIZATION statement.
does not specify the EXTERNAL SECURITY clause executes the UDF as a thread of a hybrid server that runs under the authorization of the 'tdatuser' operating system user.

Whether a CREATE FUNCTION or REPLACE FUNCTION statement needs to specify the EXTERNAL SECURITY clause depends on the types of resources (if any) that the UDF needs to access during execution. For more informaiton, see Resource Access.