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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.
User-Defined Routines and Data Types Developer's GuideThe Informix® User-Defined Routines and Data Types Developer's Guide describes how to define new data types and enable user-defined routines (UDRs) to extend HCL Informix®.
A user-defined routine
Tasks that you can perform with user-defined routines
Support user-defined data types
Opaque data type support functions

Opaque data type support functions

When you define a new opaque data type, you provide support functions that enable the database server to operate on the data type. The database server requires some support functions, and others are optional. The following list shows the standard functions that you define to support opaque data types:

Text input and output routines
Binary send and receive routines
Text import and export routines
Binary import and export routines

For more information about support functions for opaque data types, refer to Write support functions.

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