Welcome
Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Informix 4GL/SQL
These topics include information about HCL Informix®4GL and SQL.
What's new in HCL Informix® 4GL
HCL Informix® 4GL has new, changed, and removed features.

HCL Informix® V15.0 documentation
Welcome to the documentation for HCL Informix® 15.0 and related client tools and products.
Product overview
HCL Informix® is a fast and scalable database server that manages traditional relational, object-relational, and dimensional databases. Its small footprint and self-managing capabilities are suited to embedded data-management solutions.
Installing
These topics describe how to install HCL Informix® database servers, client products, and DataBlade® modules.
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
Migrating and upgrading
You can upgrade to the 15.0 release of HCL Informix® or migrate from other database servers to Informix. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix database server can affect upgrading from a previous release.
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
- Embedded SQLJ for HCL Informix®
- ESQL/C Guide
- GLS User's Guide
  These topics describe the Global Language Support (GLS) feature available in HCL® Informix® products.
- Informix GLS API
- Informix® Object Interface for C++ Guide
- Informix® ODBC Driver Guide
- Informix .NET Core Provider
  Starting with CSDK 4.50.xC4, Informix .NET Core Provider built with .NET Core SDK/Runtime v3.1 is shipped for Windows x64 and Linux x86_64 platforms.
- Informix® .NET EF Core Provider Guide
- Informix 4GL/SQL
  These topics include information about HCL Informix®4GL and SQL.
  - What's new in HCL Informix® 4GL
    HCL Informix® 4GL has new, changed, and removed features.
  - HCL Informix® 4GL System Requirements
    This document describes the operating system requirements for HCL Informix® Informix 4GL.
  - HCL Informix® 4GL/SQL PDF
    This topic provides a link to the Informix 4GL documentation.
  - Release Information
    These are the release, documentation, and machine notes for HCL® Informix® 4GL and ISQL.
  - Notices
- Informix® JDBC Driver Guide
- 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
Embedding Informix®
When you embed HCL Informix®, you can use enterprise-class high-availability and high performance with embeddability features such as easy programmability, a small disk and memory footprint, and silent deployment.
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.
Data warehousing
In addition to designing and implementing Informix® dimensional databases, you can use tools to create data warehouse applications and optimize your data warehouse queries.
Designing databases
The first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
Security
You can secure your Informix® database server and the data that is stored in your Informix databases. You can encrypt data, secure connections, control user privileges and access, and audit data security.
SQL programming
You can use the HCL Informix® implementation of the SQL language to develop applications for Informix database servers.
Troubleshooting HCL Informix®
Several troubleshooting techniques, tools, and resources are available for resolving problems that you encounter in your HCL Informix® database server environment.

What's new in HCL Informix® 4GL

HCL Informix® 4GL has new, changed, and removed features.

What's new in HCL Informix® 4GL FC5

LVARCHAR data type support
Informix 4GL SSL Connectivity Updates

What's new in HCL Informix® 4GL FC4

Compatibilty Enhancement
SQLCA Record Structure Enhancement

What's new in HCL Informix® 4GL FC5

LVARCHAR data type support

HCL Informix® 4GL FC5 supports LVARCHAR data type in 4GL applications.

Informix 4GL SSL Connectivity Updates: HCL Informix® 4GL FC5, includes the required libraries to enable connections to an Informix server configured for SSL encryption.

For more information, see Release, documentation, and machine notes for HCL® Informix® 4GL, version 7.51.FC5

What's new in HCL Informix® 4GL FC4

Compatibilty Enhancement

HCL Informix® 4GL FC4 is compatible with 15.0.x
HCL Informix® 4GL is enabled to support the new 15.0.x large table feature.

SQLCA Record Structure Enhancement: Starting from HCL Informix® 4GL FC4, SQLERRD ARRAY is enhanced to include BIGINT.