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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
Obtaining status information for a smart large object
Initialize an LO-status structure
Fill in the LO-status structureAfter mi_lo_stat() has a pointer to a valid LO-status structure, it fills this structure with the status information for the open smart large object. You pass an LO file descriptor of the open smart large object as an argument to the mi_lo_stat() function.

Fill in the LO-status structure

After mi_lo_stat() has a pointer to a valid LO-status structure, it fills this structure with the status information for the open smart large object. You pass an LO file descriptor of the open smart large object as an argument to the mi_lo_stat() function.

After the execution of mi_lo_stat() in Sample mi_lo_stat() call, the LO_stat variable points to an allocated LO-status structure that contains status information for the smart large object that the LO file descriptor, LO_fd, identifies.

Important: Before you use an LO-status structure, make sure that you either call mi_lo_stat() with the LO-status pointer set to NULL or initialize this pointer with a previous call to mi_lo_stat().

For more information, see Status information in the LO-status structure. For the syntax of the mi_lo_stat() function, see the Informix® DataBlade® API Function Reference.

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