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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.
DataBlade® module programming languages
C languageThe enables you to create database objects in C. You can create user-defined routines, cast support functions, aggregates, and opaque data type support routines in C.

C language

The enables you to create database objects in C. You can create user-defined routines, cast support functions, aggregates, and opaque data type support routines in C.

The code generated for C by the DataBlade® Developers Kit uses DataBlade API routines to communicate with the database server. The DataBlade API is the primary API for the database server. The DataBlade API provides routines to manage database connections, send SQL command strings, process query results, manage database server events and errors, create database server routines, manage database server memory, and so on. The DataBlade API provides a subset of Informix® ESQL/C and routines that you can use in your DataBlade module code. For more information about the DataBlade API, see the Informix DataBlade API Programmer's Guide.

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