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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.
Programming guidelinesUse this section to help you when you write the design specification for your DataBlade® module.
Programming language optionsThis section explains the programming language options you have when you use BladeSmith to generate source code for your DataBlade® module.
Options for routinesIf you choose to program your user-defined routines in C, you can choose any of the routine options available in BladeSmith.

Options for routines

If you choose to program your user-defined routines in C, you can choose any of the routine options available in BladeSmith.

When you implement a routine in Java™, you cannot specify the following options:

That it has a selectivity function or is a selectivity function.
That it takes row data types or collection data types as arguments.
That it is internal.
Its stack size
Its cost.
That it has a commutator function or is a commutator function.

Tip: You can also choose to implement routines in HCL OneDB™ Stored Procedure Language (SPL).

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