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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® Module Development OverviewThe HCL Informix® DataBlade® module overview serves as an overview of the HCL Informix® DataBlade® module development process.
DataBlade® module concepts
DataBlade® modules and the database serverThis section describes the overall architecture of the HCL Informix® database server, how DataBlade® modules affect database server processes, and the application programming interfaces you can use in your DataBlade® modules and client applications.
Internal architecture of the database serverIf you want to add user-defined routines to your HCL Informix® database server, you must understand the internal architecture of the database server and how DataBlade® module routines can affect the database system.
DataBlade® module memory allocation

DataBlade module memory allocation

Another important aspect of the internal architecture of your HCL Informix® database server is that virtual processors communicate with one another through shared memory. Therefore, when you write code for user-defined routines, you cannot use standard memory allocation functions. To manage memory for DataBlade® modules, you must use the memory management functions provided by the DataBlade API or the JDBC 2.0 API.

See the Informix DataBlade API Programmer's Guide or the J/Foundation Developer's Guide for complete information.

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