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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.
The ActiveX value objectsThis section provides information for client application developers who are using ActiveX value objects.
Install and use ActiveX value objectsThis section provides some guidelines on installing and using ActiveX value objects.
ActiveX Value Objects

ActiveX Value Objects

Follow the Microsoft™ guidelines on how to start COM and automation objects.

If you are using the client API, it is recommended that you write the application in C++ and place only the SQL-specific code in the .ec files through embedded C code.

If you are using Visual Basic, you must cast the HCL OneDB™ lvarchar data type to char before you can work with ActiveX value objects.

Important: As you use ActiveX value objects, keep in mind that object persistence between server and client objects is not supported. In other words, although you can modify an ActiveX value object, an associated modification does not occur to the database data represented by that object unless you issue an SQL query.