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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.
DataBlade® Developers KitThe DataBlade® Developers Kit (DBDK) guides contain information about the tools you can use to develop and package DataBlade® modules, which extend the functionality of HCL OneDB™ databases.
DataBlade® Developers Kit User's GuideThe HCL OneDB™ DataBlade® Developers Kit Users Guide describes how to use OneDB® DataBlade® Developers Kit (DBDK) tools to develop and package DataBlade® modules.
Design DataBlade® modulesThis section describes the DataBlade® module SQL design issues.
Data type designAfter you have designed a data model for your DataBlade® module, you can design its specifics, such as data types to best represent your DataBlade® module objects.

Data type design

After you have designed a data model for your DataBlade® module, you can design its specifics, such as data types to best represent your DataBlade module objects.

Your HCL OneDB™ database server supports a rich set of data types, known as built-in data types. It is recommended that you use built-in types wherever possible; however, even with built-in types, consider the following design issues:

How accessible must the elements of each object be?
How large is each object?

This section provides some guidelines for making these design decisions.