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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® Developers KitThe DataBlade® Developers Kit (DBDK) guides contain information about the tools you can use to develop and package DataBlade® modules, which extend the functionality of HCL Informix® databases.
DBDK InfoShelfThe DataBlade® Developers Kit InfoShelf is designed to help you work with BladeSmith.
DataBlade® Developers Kit TutorialThe Tutorial is a set of exercises that demonstrate how to create extensions to HCL Informix® and package them as DataBlade® modules by using DBDK. Support for DataBlade Developers Kit (DBDK) is removed starting Informix Server 14.10.xC6.
GlossaryThis section contains additional reference information
Type compare functions

Type compare functions

Type compare support consists of an internal support function, Compare(), and two operator functions, Equal() and NotEqual(), that users can use in SQL statements to evaluate two opaque data types.

The generated Compare() function compares two opaque data types member-by-member until it finds two members that are not equal. The Equal() and NotEqual() functions call the Compare() function. The Equal() function tests whether the Compare() function returns 0 when two opaque data types are compared. The NotEqual() function tests whether the Compare() function returns a nonzero value when two opaque data types are compared.

BladeSmith generates complete code for these functions; however, you can modify the way the Compare() function evaluates its opaque data type arguments.

See the Informix® DataBlade® Developers Kit User's Guide for more information.

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