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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.
R-Tree Index User's GuideThe Informix® R-Tree Index User's Guide describes the HCL Informix® R-tree secondary access method and how to access and use its components.
R-tree secondary access method concepts
R-tree functionality that HCL Informix® providesInformix® provides R-tree functionality in the R-tree secondary access method extension.
R-tree secondary access method extensionThe R-tree secondary access method extension is automatically installed with Informix®.
Additional R-tree components

Additional R-tree components

The R-tree access method also includes:

A list of error messages that the R-tree access method uses
An interface object ifxrltree1 that the DataBlade® modules that depend on the R-tree access method use

The R-tree access method itself is built into Informix®.

The R-tree error messages have error codes of the form RTRnn, where:

RTR is the three-character prefix for all R-tree error codes.
nn are two characters (0 to 9 or A to Z) that uniquely identify each error code.

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