Home
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.
Character data types
Character processingThe DataBlade® API library provides the transfer, conversion, and operation functions to process character data.
Character type information

Character type information

The DataBlade® API provides functions to obtain the following information about a character (CHAR, VARCHAR, and IDSSECURITYLABEL) data type:

The data type: its type name (string), type descriptor, or type identifier
The precision: the maximum number of characters in the data type

The DataBlade API provides the following functions to obtain the type and precision of a character data type.

The following table lists functions for obtaining the type name, type identifier, or type descriptor of a character data type and functions or obtaining the precision of a character data type
Purpose of function	Functions for obtaining the type name, type identifier, or type descriptor of a character data type	Functions for obtaining the precision of a character data type
For a basic data type	mi_type_typedesc(), mi_type_typename()	mi_type_precision()
For a UDR argument	mi_fp_argtype(), mi_fp_setargtype()	mi_fp_argprec(), mi_fp_setargprec()
For a UDR return value	mi_fp_rettype(), mi_fp_setrettype()	mi_fp_retprec(), mi_fp_setretprec()
For a column	mi_column_type_id(), mi_column_typedesc()	mi_column_precision()
For an input parameter in a prepared statement	mi_parameter_type_id(), mi_parameter_type_name()	mi_parameter_precision()

Rate this topic

5 stars 4 stars 3 stars 2 stars 1 star

Comment on this topic.

By clicking this box, you acknowledge that you are NOT a U.S. Federal Government employee or agency, nor are you submitting information with respect to or on behalf of one. HCL provides software and services to U.S. Federal Government customers through its partners immixGroup, Inc. Contact this team at https://hcltechsw.com/resources/us-government-contact. Do not include any personal data in this Comment box.