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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®.
Data manipulation
Smart large objects
Creating a smart large object
Obtain the LO-specification structureBefore you create a smart large object, obtain a valid LO-specification structure to hold its storage characteristics.
Specify new storage characteristics
Initialize an LO-specification structureThe mi_lo_spec_init() function initializes the LO-specification structure with values that obtain the system-specified storage characteristics. The system-specified storage characteristics are the defaults that the database server uses. They are the storage characteristics at the bottom of the storage-characteristics hierarchy.

Initialize an LO-specification structure

The mi_lo_spec_init() function initializes the LO-specification structure with values that obtain the system-specified storage characteristics. The system-specified storage characteristics are the defaults that the database server uses. They are the storage characteristics at the bottom of the storage-characteristics hierarchy.

After this initialization, you can change the values in the LO-specification structure:

The new smart large object inherits column-level storage characteristics of a CLOB or BLOB column.
You provide user-specified storage characteristics for the new smart large object.

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