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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.
AppendixesThis section contains additional reference information.
Source files generated for DataBlade® modulesYou can use the tables in this section to find a brief description of the types of files BladeSmith generates for your DataBlade® project.
C source code files

C source code files

BladeSmith generates Visual C++ project and workspace files and a UNIX™ makefile into the \project\src directory.

Table 1. Visual C++ project and workspace files
File name	Description
Project.dsp	Visual C++ project file
Project.dsw	Visual C++ workspace file
ProjectU.mak	Combination C and C++ makefile for use from the UNIX command line

BladeSmith generates the following C source files into the project\src\C directory. You can modify only the Opaque.c, udr.c, and statistics.c files.

Table 2. C source files
File name	Description
Opaque.c	Source code file generated for each opaque type; the file contains the support functions for that opaque type.
Project.def	Definitions file listing all exported C routines; for use by Visual C++ 6.0 or later.
Project.h	Header file that contains project definitions, including the C data structures that define your opaque types.
readme.txt	Text file providing short descriptions of the files in this directory.
statistics.c	Source code file that contains statistics support functions.
support.c	Source code file that contains utility functions and #include directives for header files.
udr.c	Source code file that contains user-defined routines, cast support functions, and aggregates.
warning.txt	Text file providing warnings about potential source code problems.

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