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®.
Data manipulation
Date and time data typesThis section describes the date and time data types and the functions that the DataBlade® API supports to process date and time data.
Date-time or interval dataThe DataBlade® API provides support for date-time or interval data in both text and binary representations.
Conversion of date-time or interval representationsBoth the DataBlade® API library and the Informix® ESQL/C library provide functions that convert from the text (string) representation of a date, time, or interval value to the binary (internal) representation for DATETIME or INTERVAL.
DataBlade® API functions for date-time or interval conversionThe DataBlade® API provides functions for conversion between text and binary representations of date-time or interval data.

DataBlade API functions for date-time or interval conversion

The DataBlade® API provides functions for conversion between text and binary representations of date-time or interval data.

Table 1. DataBlade API functions for date-time or interval conversion
DataBlade API function	Convert from	Convert to
mi_datetime_to_string()	DATETIME (mi_datetime)	Date-time string
mi_interval_to_string()	INTERVAL (mi_interval)	Interval string
mi_string_to_datetime()	Date-time string	DATETIME (mi_datetime)
mi_string_to_interval()	Interval string	INTERVAL (mi_interval)

The mi_datetime_to_string(), mi_interval_to_string(), mi_string_to_datetime(), and mi_string_to_interval() functions convert DATETIME and INTERVAL values to and from the ANSI SQL standards formats for these data types.

Server only: The mi_datetime_to_string(), mi_interval_to_string(), mi_string_to_datetime(), and mi_string_to_interval() functions are useful in the input and output support functions of an opaque data type that contains mi_datetime and mi_interval values, as long as these values use the ANSI SQL formats. They enable you to convert DATETIME and INTERVAL values between their external format (text) and their internal (binary) format when transferred to and from client applications.

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.