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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™.
ConceptsThis section introduces the infrastructure for creating and executing user-defined routines (UDRs) and applications that you write in Java™ to run in the HCL OneDB™ database server.

Concepts

This section introduces the infrastructure for creating and executing user-defined routines (UDRs) and applications that you write in Java™ to run in the HCL OneDB™ database server.

This section provides the following information:

Basic characteristics of Java UDRs
Basic architecture for executing Java UDRs in the database server
Impact of Java UDRs on the database server system catalog tables

For general information about the purpose and the process of developing UDRs for the database server, see the HCL OneDB User-Defined Routines and Data Types Developer's Guide. For information about how to access databases from Java UDRs, see the HCL OneDB JDBC Driver Programmer's Guide.

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