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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.
DataBlade® Developers Kit User's GuideThe HCL Informix® DataBlade® Developers Kit User's Guide describes how to use tools to develop and package DataBlade® modules.
Programming DataBlade® module routines in CThis section contains information to help you edit and compile C language source code generated by DataBlade®.
Compile DataBlade® module codeThis section describes how to compile DataBlade® module code.
Compiling on a UNIX™ operating system
Unresolved symbols (HCL Informix® 9.14)When you link on UNIX™, the system displays a list of unresolved symbols.

Unresolved symbols (HCL Informix 9.14)

When you link on UNIX™, the system displays a list of unresolved symbols.

This list can contain these types of unresolved symbols:

Symbols that are later resolved by the database server when it loads the DataBlade® module shared object. This is expected behavior.
Symbols that are misspelled; you must fix these symbols. Check the list carefully for misspellings, including incorrect case.
Symbols that are not yet coded.
Symbols that are not found in a private library.

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