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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
Numeric data typesThis section describes these numeric data types and the functions that the DataBlade® API supports to process numeric data.
Fixed-point dataFixed-point data is a decimal value with a fixed number of digits to the right and left of the decimal point. The fixed number of digits to the right of the decimal point is called the scale of the value. The total number of digits in the fixed-point value is called the precision of the value.
Fixed-point binary representations
The decimal.h header fileThe decimal.h header file contains definitions for use with the DECIMAL and MONEY data types.
ESQL/C DECIMAL-type functions

ESQL/C DECIMAL-type functions

Because the binary representation of DECIMAL (mi_decimal) and MONEY (mi_money) values is a proprietary format for HCL Informix®, you cannot use standard system functions to perform decimal operations on mi_decimal and mi_money values. Instead, the DataBlade® API provides support for the following Informix ESQL/C functions on the DECIMAL and MONEY data types.

Conversion functions
Arithmetic-operation functions

Any other operations, modifications, or analyses can produce unpredictable results.

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