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Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
API
The Informix® GLS API Programmer's Guide describes the global language support (GLS) application programming interface (API) available in Informix ESQL/C and HCL Informix DataBlade® modules.
Using Informix® GLS
The library enables a program to access the culture-specific information in the GLS locales that Informix® provides.
Improve program performance
Optimize Informix® GLS

Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
- Change Data Capture API Programmer's Guide
  The Informix® Change Data Capture API Programmer's Guide describes how to program applications to process changed data from HCL Informix databases using the Informix Change Data Capture API.
- Embedded SQLJ for HCL Informix®
  The Informix® Embedded SQLJ User's Guide contains information about using Informix Embedded SQLJ.
- ESQL/C Guide
  The Informix® ESQL/C Programmer's Manual explains how to use Informix ESQL/C, the Informix implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
- GLS User's Guide
  The Informix® GLS User's Guide describes the Global Language Support (GLS) feature available in Informix products.
- API
  The Informix® GLS API Programmer's Guide describes the global language support (GLS) application programming interface (API) available in Informix ESQL/C and HCL Informix DataBlade® modules.
  - Using Informix® GLS
    The library enables a program to access the culture-specific information in the GLS locales that Informix® provides.
    - Internationalized programs with Informix® GLS
      You can make HCL Informix® database applications easily adaptable to any culture and language.
    - Using Informix® GLS in a C-language program
    - Improve program performance
      - Optimize Informix® GLS
      - Processing wide characters
        You can choose how to structure your data to improve performance. provides wide-character versions of most of its multibyte processing functions.
  - Character processing
    These topics describe the character-processing capabilities of the library.
  - Data formatting
    You must handle the format of locale-specific data in your applications.
  - Informix® GLS functions
    These topics describe the functions that the library provides. First is a summary of functions by categories. The rest of the topics provide reference information about the public functions, in alphabetical order.
  - Appendix
- Informix® Object Interface for C++ Guide
  The Informix® Object Interface for C++ Programmer's Guide describes how to develop HCL Informix client applications by using the object-oriented C++ programming language.
- Informix® ODBC Driver Guide
  The Informix® ODBC Driver Programmer's Manual serves as a user guide and reference for Informix ODBC Driver, which is the Informix implementation of the Microsoft™ Open Database Connectivity (ODBC) interface, Version 3.0.
- .NET provider options
  The Data Server Provider for .NET DB2® provider option is the preferred Informix® provider for developing new applications.
- Informix® JDBC Driver Guide
  The Informix® JDBC Driver Programmer's Guide describes how to install, load, and use Informix JDBC Driver to connect to the Informix database from within a Java™ application or applet.
- Informix International Language Supplement (ILS) User Guide
  These topics include information about the translated user interface files for Informix® UNIX™ products, locales, and code set conversion tables
- Informix® OLE DB Provider Guide
  The Informix® OLE DB Provider Programmer's Guide describes the software requirements for using Informix OLE DB Provider, show how to install and configure the provider for your use, and explain how to use Informix OLE DB Provider to enable client applications, such as ActiveX Data Object (ADO) applications and web pages, to access data on the Informix server.

Optimize Informix® GLS

You can optimize the functions by performing the following tasks:

Evaluate the requested function.
Determine if the requested function is appropriate for the data that you are trying to process.
Execute the code that is appropriate for the type of data.

For example, if you use the ifx_gl_mbsnext() function to traverse data that is encoded in a single-byte code set, the function is reduced to a macro that advances the character byte by byte. The function does not execute code that parses multibyte sequences because it determines that the data is single byte.

Additionally, when collation is based on code-set order rather than locale-specific order, functions use a binary compare (such as strcmp()) instead of algorithms that examine collation weights.