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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® API Programmer's GuideThe Informix® DataBlade® API Programmer's Guide describes information about the DataBlade® API, the C-language application programming interface (API) provided with HCL Informix®.
DataBlade® API overview
Access SQL data typesThis section provides an overview of the data types that the DataBlade® API supports.
Byte data types

Byte data types

The DataBlade® API supports the following data types that can hold byte data in a DataBlade API module.


DataBlade API character data type	Description	SQL character data type
mi_bitvarying	Varying-length structure to hold varying-length byte data	None
MI_LO_HANDLE	LO handle to identify a smart large object that holds byte data	BLOB

Tip: The database server also supports the BYTE data type for byte data. It stores BYTE data as a simple large object. However, the DataBlade API does not directly support simple large objects.

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