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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 text representationsThe text representation of a fixed-point value is a quoted string that contains a series of digits. The DataBlade® API supports a text representation for both decimal and monetary values.
Decimal text representation

Decimal text representation

The DataBlade® API supports a decimal value in text representation as a quoted string that contains the characters that the following table shows.


Contents of fixed-point string	Character
Digits	0–9
Thousands separator: symbol between every three digits	, (comma)
Decimal separator: symbol between the integer and fraction portions of the number	. (period)

A decimal value in its text representation is often called a decimal string. For example, the following decimal string contains the value for 1,345.77:

"1,345.77"

In a decimal string, the thousands separator is optional.

A locale defines the end-user format for numeric values. The end-user format is the format in which data appears in a client application when the data is a literal string or character variable. The preceding decimal string is the end-user format for the default locale, US English. A nondefault locale can define an end-user format that is particular to a country or culture outside the US. For more information, see the Informix® GLS User's Guide.

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