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Extending Informix®Beyond standard relational database objects, HCL Informix® can be extended to handle specialized data types, access methods, routines, and other objects. Informix® includes many built-in extensions that are fully integrated in the database server. Informix® 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 Informix®.
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 Informix® 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 Informix® databases.
DataBlade® Developers Kit User's GuideThe HCL Informix® DataBlade® Developers Kit User's Guide describes how to use 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 statistics routines in statistics.c

Edit statistics routines in statistics.c

If you selected statistics support routines when creating an opaque data type, BladeSmith generates code for the following statistics support routines for your opaque data type in the statistics.c source code file:

Statistics collection function
Statistics print function
Statistics minimum, maximum, and distribution functions

To implement user-defined statistics, you must also create selectivity routines to calculate the selectivity of routines that compare your opaque data type. Selectivity routines call the statistics support functions.

Important: To avoid merging conflicts when you regenerate your code, add code only in areas marked by

TO
DO:

comments or after the generated code. 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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