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Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for HCL OneDB™.
Creating extensionsYou can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in HCL OneDB™ databases.
J/Foundation Developer's GuideThe HCL® J/Foundation Developer's Guide describes how to write user-defined routines (UDRs) in the Java™ programming language for HCL OneDB™.
Create Java™ user-defined routinesA user-defined routine (UDR) is a routine that an SQL statement or another UDR can invoke. UDRs written in Java™ code use the server-side implementation of the HCL OneDB™ JDBC Driver to communicate with the database server.
Registering Java™ user-defined routinesFor a UDR to be invoked in an SQL statement, it must be registered in the current database. Use the CREATE FUNCTION and CREATE PROCEDURE statements to register UDRs.

Registering Java user-defined routines

For a UDR to be invoked in an SQL statement, it must be registered in the current database. Use the CREATE FUNCTION and CREATE PROCEDURE statements to register UDRs.

Tip: Place your SQL statements for registering UDRs written in Java™ code in a deployment descriptor file.

The following sections describe the Java-specific syntax of the CREATE FUNCTION and CREATE PROCEDURE statements that affect UDR registration.

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