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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®.
Database access
Connection handlingThis section describes how to initialize, establish, and close connections.
Establish a connectionThe DataBlade® API functions, mi_open() and mi_server_connect() (client only), are constructor functions for a connection descriptor.

Establish a connection

The DataBlade® API functions, mi_open() and mi_server_connect() (client only), are constructor functions for a connection descriptor.

These functions establish a connection and return a pointer to a connection descriptor, which holds information from the session context. You can then pass this connection descriptor to subsequent DataBlade API functions that need to access the session context.

The DataBlade API supports the establishment of UDR connections and client connections.

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