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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.
Create DataBlade® objects by using BladeSmithUse BladeSmith to create DataBlade® modules.
Create a project
Server compatibilityWhen you create a project in BladeSmith, you must specify the version of the database server with which you want your DataBlade® module to be compatible.

Server compatibility

When you create a project in BladeSmith, you must specify the version of the database server with which you want your DataBlade® module to be compatible.

Different database server versions have different features; if you choose a feature that is not available for the database server version you specified, the feature is either disabled or BladeSmith displays a warning.

The following features are compatible only with Version 9.2 and later of HCL OneDB™:

User-defined statistics
Long identifiers for database objects

If you specify a database server version of 9.14 and attempt to add user-defined statistics support for an opaque data type, you receive a warning stating that statistics support is not available with Version 9.14.

You can use OneDB DataBlade Developers Kit (DBDK) to generate Java™ code for aggregates, cast support functions, and user-defined routines. However, you must use J/Foundation to enable services that use Java. For more information about J/Foundation, see the publication HCL® J/Foundation Developer's Guide.

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