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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.
Boolean data typesBoolean data holds values to indicate two states: true and false. The DataBlade® API provides support for boolean values in both their text and binary representations.
Boolean text representation

Boolean text representation

The DataBlade® API supports a Boolean value in text representation as a character enclosed in single quotation marks, with the format that the following table shows.

Table 1. Text representation of Boolean data
Boolean value	Text representation
True	't' or 'T'
False	'f' or 'F'

A Boolean value in its text representation is often called a Boolean string.

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