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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.
Limitations to streams

Limitations to streams

The following limitations apply to the I/O streams in HCL OneDB™:

BLOBs and CLOBs are not supported.
Text Input and Output across locales is not supported.
Text Input and Output for intervals is not supported.
Time stamps are only supported in their full format. Qualifiers are not supported.
Byte arrays, byte[ ], and Object/Stream I/O are not supported for either text or binary operations.