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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™.
Opaque user-defined data typesThis section describes how to use opaque user-defined data types (UDTs). This section describes the default SQLData interface and how to override the default.

Opaque user-defined data types

This section describes how to use opaque user-defined data types (UDTs). This section describes the default SQLData interface and how to override the default.

It provides the following information:

The SQLData Interface
SQL statements to create default I/O routines
HCL OneDB™ extensions to SQLInput and SQLOutput interfaces
How to override the default I/O methods
Required I/O function sets and related data types
Limitations to Streams