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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®.
Generated code
Identify the source of generated codeWhen BladeSmith generates source code for your DataBlade® module, it uses routines and data structures from various libraries.

Identify the source of generated code

When BladeSmith generates source code for your DataBlade® module, it uses routines and data structures from various libraries.

The following table lists common prefixes for data types and routines appearing in generated DataBlade module code and lists their sources and where they are documented.

Table 1. Common prefixes for data types and routines
Prefix	Library	More information
mi_	DataBlade API	Almost all DataBlade API routines and data types have the mi_ prefix. See the Informix® DataBlade API Programmer's Guide for more information.
Gen_	BladeSmith	All variable names and routine names not explicitly named in the project have the Gen_ prefix. See Utility functions generated by BladeSmith for more information about utility functions.
DBDK_TRACE_	BladeSmith	BladeSmith uses four macros for error handling and tracing in generated code. See Tracing and error handling for more information.
gl_	DataBlade API	The gl_dprintf() and gl_tprintf() functions are used for internationalized tracing. See the Informix DataBlade API Programmer's Guide for more information.
ifx_gl_	GLS API	All GLS API routines have the ifx_gl_ prefix. See the Informix GLS User's Guide for more information.
ifx_	ESQL/C	In code generated by BladeSmith, this prefix indicates routines and data types from ESQL/C. See the Informix ESQL/C Programmer's Manual for more information.

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