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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.
DBDK InfoShelfThe DataBlade® Developers Kit InfoShelf is designed to help you work with BladeSmith.
DataBlade® Developers Kit TutorialThe Tutorial is a set of exercises that demonstrate how to create extensions to HCL Informix® and package them as DataBlade® modules by using DBDK. Support for DataBlade Developers Kit (DBDK) is removed starting Informix Server 14.10.xC6.
GlossaryThis section contains additional reference information
MI_FPARAM argument

MI_FPARAM argument

When the database server calls a user-defined routine, it passes an extra argument, MI_FPARAM, to the routine. The MI_FPARAM structure contains state information about the routine. Typically, you use the MI_FPARAM argument to test whether another argument is null, to set another argument to NULL, or to store iterated values. You access the values contained in the MI_FPARAM structure by using the accessor functions provided by the DataBlade® API.

While the code generated by BladeSmith contains the MI_FPARAM argument, in most cases it does not include code to access the value stored in the MI_FPARAM structure; you must add code to access these values. The generated code for routines that take null values and that are iterators do use the values in the MI_FPARAM structure.

For more information about the MI_FPARAM structure, see the Informix® DataBlade API Programmer's Guide.

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