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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®.
The Informix® JDBC DriverAll UDRs written in Java™ code can access the database server data through the Informix® JDBC Driver application programming interface (API). This section briefly describes the Informix® implementation of the Informix® JDBC Driver API and the server-side Informix® JDBC Driver.

The Informix JDBC Driver

All UDRs written in Java™ code can access the database server data through the Informix® JDBC Driver application programming interface (API). This section briefly describes the Informix implementation of the Informix JDBC Driver API and the server-side Informix JDBC Driver.

Generally, the Informix server-side Informix JDBC Driver derives from the client-side driver so that the two drivers are essentially the same. Java UDRs require some differences, however, to use the Informix JDBC Driver from the server side. This section describes the public Informix JDBC Driver interfaces and Informix JDBC Driver subprotocols that the Informix JDBC Driver provides specifically for server-side Informix JDBC Driver applications, and restrictions that apply to server-side Informix JDBC Driver applications. For principal documentation of the Informix JDBC Driver, see the Informix JDBC Driver Programmer's Guide.

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