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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.
J/Foundation Developer's GuideThe J/Foundation Developer's Guide describes how to write user-defined routines (UDRs) in the Java™ programming language for Informix®.
Create Java™ user-defined routinesA user-defined routine (UDR) is a routine that an SQL statement or another UDR can invoke. UDRs written in Java™ code use the server-side implementation of the Informix® JDBC Driver to communicate with the database server.
Comply with SQLJ
Unsupported optional modifiers

Unsupported optional modifiers

HCL Informix® UDRs do not support the following optional routine modifiers of the SQLJ specification:

Dynamic result sets
Inout parameter
Output parameters in callable statements

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