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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®.
Edit routines in udr.c

Edit routines in udr.c

BladeSmith DataBlade® generates code for the following types of routines in the udr.c source code file:

Most user-defined routines
Cast support functions
Aggregate functions
Selectivity functions
Iterator functions

Important: Avoid code merge problems by modifying code only in the sections marked with a TO DO: note. If you do modify code outside the designated areas, after you regenerate you might have two copies of the routine: the one you modified and the one BladeSmith generated. Although your changes remain, you must resolve the conflicts in the two pieces of code.

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