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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.
Obtain fixed-point type informationThe DataBlade® API provides functions to obtain the scale and precision of a fixed-point (DECIMAL and MONEY) data type.

Obtain fixed-point type information

The DataBlade® API provides functions to obtain the scale and precision of a fixed-point (DECIMAL and MONEY) data type.

Table 1. DataBlade API functoins that obtain the scale and precision of a fixed-point data type
Source	DataBlade API functions
For a data type	mi_type_precision(), mi_type_scale()
For a UDR argument	mi_fp_argprec(), mi_fp_setargprec(), mi_fp_argscale(), mi_fp_setargscale()
For a UDR return value	mi_fp_retprec(), mi_fp_setretprec(), mi_fp_retscale(), mi_fp_setretscale()
For a column in a row (or field in a row type)	mi_column_precision(), mi_column_scale()
For an input parameter in a prepared statement	mi_parameter_precision(), mi_parameter_scale()

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