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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.
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.
Globalization and date formats
Support for HCL Informix® GLS variables

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.
- 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.
  - Getting started
  - Connect to the database
  - Perform database operations
  - Work with Informix® types
  - Work with opaque types
  - Globalization and date formats
    - Support for Java™ and globalization
    - Support for HCL Informix® GLS variables
    - Support for DATE end-user formats
    - Precedence rules for end-user formats
    - Support for code-set conversion
    - User-defined locales
      Informix® JDBC Driver uses the Java™ globalization API to manipulate international data.
    - Support for globalized error messages
  - Push data feature
  - Tuning and troubleshooting
  - Appendixes
- 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.

Support for HCL Informix® GLS variables

Globalization adds several environment variables to Informix® JDBC Driver, which are summarized in the following table.


Supported Informix® environment variables	Description
CLIENT_LOCALE	Specifies the locale of the client that is accessing the database. Provides defaults for user-defined formats such as the GL_DATE format. User-defined data types can use it for code-set conversion. Together with the DB_LOCALE variable, the database server uses this variable to establish the server processing locale. The DB_LOCALE and CLIENT_LOCALE values must be the same, or their code sets must be convertible.
DBCENTURY	Enables you to specify the appropriate expansion for one- or two-digit year DATE values
DBDATE	Specifies the end-user formats of values in DATE columns. Supported for compatibility with earlier versions; GL_DATE is preferred.
DB_LOCALE	Specifies the locale of the database. Informix® JDBC Driver uses this variable to perform code-set conversion between Unicode and the database locale. Together with the CLIENT_LOCALE variable, the database server uses this variable to establish the server processing locale. The DB_LOCALE and CLIENT_LOCALE values must be the same, or their code sets must be convertible.
GL_DATE	Specifies the end-user formats of values in DATE columns
GL_USEGLU	To enable Unicode collation by Java/JDBC client applications with the International Components for Unicode (ICU), specify GL_USEGLU=1 in the connection string before connecting to the Informix® instance. This enables the server to use advanced Unicode converters that are required to work with Java™. The GL_USEGLU environment variable must be set to a value of 1 (one) in the database server environment before the server is started, and before the database is created.
NEWCODESET	Allows new code sets to be defined between releases of Informix® JDBC Driver.
NEWLOCALE	Allows new locales to be defined between releases of Informix® JDBC Driver.

The Informix® JDBC Driver does not change the decimal format, even if there is a CLIENT_LOCALE setting available. Globalization should be done within the Java™ application with the DecimalFormat class.

Important: The DB_LOCALE, CLIENT_LOCALE, and GL_DATE variables are supported only if the database server supports the feature.