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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® module routines in CThis section contains information to help you edit and compile C language source code generated by DataBlade®.
Generated code
Comments in generated codeBladeSmith adds comments to the code it generates. Each routine begins with a prologue that describes the purpose of the routine, its arguments, and its return value. Comments throughout the code describe variable declarations and the results of generated C statements and routine calls.

Comments in generated code

BladeSmith adds comments to the code it generates. Each routine begins with a prologue that describes the purpose of the routine, its arguments, and its return value. Comments throughout the code describe variable declarations and the results of generated C statements and routine calls.

In comments at the beginning and end of each generated routine, BladeSmith stores information it uses when regenerating source code. The prologue includes a routine ID. A comment at the end of the routine contains a calculated checksum.

Restriction: Do not modify either of these comments; BladeSmith uses them to merge your edits into the regenerated code.

BladeSmith adds a Gen_ prefix to all variable names and routine names you did not create or explicitly define in BladeSmith: for example, utility functions and the Gen_Con connection argument.