You develop the body of a UDF using the Java programming language.
You can use any class name or method name to implement the Java UDF. Later, when you use the CREATE FUNCTION or REPLACE FUNCTION statement to create an SQL identifier for the UDF, you specify the class and method names so that the database knows what to execute when an SQL statement specifies the UDF.
Customers using Vantage delivered as-a-service cannot create their own C++ and Java UDFs, UDMs, UDTs, or External Stored Procedures.