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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
Complex data typesThis section describes the complex data types and the functions that the DataBlade® API supports to process collection and row-type data.
Row typesA row type is a complex data type that is made up of a sequence of one or more elements called fields. Each field has a name and a data type. A row type is similar to a C struct data type. The DataBlade® API provides support for row types in both their text and binary representations.
Create a row typeTo create a row type, you create a row structure (MI_ROW) that holds the row type.

Create a row type

To create a row type, you create a row structure (MI_ROW) that holds the row type.

The mi_row_create() function is the constructor function for the row structure (MI_ROW). To create a row type with mi_row_create(), you must provide the following information to the function:

A row descriptor that describes the fields of the row type (or columns of a row)
The values of the row-type fields (or row columns)

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