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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 DataBlade® modules in Java™This section contains information to help you edit and compile Java™ language source code generated by BladeSmith.
The generated code
BladeSmith utility classes

BladeSmith utility classes

BladeSmith generates the following utility classes whose methods are included in other generated code:

Table 1. Utility classes generated by BladeSmith
Class name	Description
IfmxInStream and IfmxOutStream	Provide read and write methods to convert Java™ value objects between a string and the internal server format. These methods perform similar tasks to the Gen_sscanf() utility function.
DBDKInputException and DBDKOutputException	Provide exception-handling methods that are called when an exception occurs during the input or output of a Java value object to or from the database server.
IfmxLog	Provides logging methods that are included throughout the source code generated by BladeSmith. For more information about using logging, see Logging and error handling.
IfmxTrace	Not currently used.

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