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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® API Programmer's GuideThe Informix® DataBlade® API Programmer's Guide describes information about the DataBlade® API, the C-language application programming interface (API) provided with HCL Informix®.
Create user-defined routines
Create special-purpose UDRsThis section describes how to create special UDRs, such as iterator functions, user-defined aggregates, and optimization functions.
Write an end-user routineA C UDR can implement an end-user routine. An end-user routine provides some additional functionality to the SQL end user. It is an SQL-invoked routine; that is, it is called directly from an SQL statement. An end-user routine can provide any task that is useful to SQL users. This user might be a database administrator or an SQL end user.

Write an end-user routine

A C UDR can implement an end-user routine. An end-user routine provides some additional functionality to the SQL end user. It is an SQL-invoked routine; that is, it is called directly from an SQL statement. An end-user routine can provide any task that is useful to SQL users. This user might be a database administrator or an SQL end user.

For more information about possible tasks of an end-user routine, see the Informix® User-Defined Routines and Data Types Developer's Guide.

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