Welcome
Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Informix® ODBC Driver Guide
Overview of HCL Informix® ODBC Driver
These topics introduce the HCL Informix® ODBC Driver and describe its advantages and architecture. The topics also describe conformance, isolation and lock levels, libraries, and environment variables.
HCL Informix® ODBC Driver components
HCL Informix® ODBC Driver includes the four components.

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
  - Overview of HCL Informix® ODBC Driver
    These topics introduce the HCL Informix® ODBC Driver and describe its advantages and architecture. The topics also describe conformance, isolation and lock levels, libraries, and environment variables.
    - What is HCL Informix® ODBC Driver?
      Open Database Connectivity (ODBC) is a specification for a database application programming interface (API).
    - ODBC component overview
      ODBC with the HCL Informix® ODBC Driver includes several components.
    - HCL Informix® ODBC Driver with the DMR
      HCL Informix® ODBC Driver includes a Driver Manager Replacement (DMR) library. The DMR replaces the driver manager on platforms where no driver manager is available.
    - HCL Informix® ODBC Driver components
      HCL Informix® ODBC Driver includes the four components.
      - Environment variables
        There are four environment variables that you must set for the driver.
      - Header files
        You can use the sql.h and sqlext.h header files, which are part of the Microsoft™ compiler, to run HCL Informix® ODBC Driver.
      - Data types
        A column of data stored on a data source has an SQL data type.
      - Libraries
        There is an installation procedure that installs libraries for UNIX™ and Windows™.
    - The HCL Informix® ODBC Driver API
      An application uses the HCL Informix® ODBC Driver API to make a connection to a data source, send SQL statements to a data source, process result data dynamically, and terminate a connection.
    - Connection pooling
      Starting CSDK 4.50.xC2 onwards, Informix ODBC driver also supports Connection Pooling capabilities. One may decide to use either Connection Pooling capabilities provided by ODBC Driver Manager or newly added capabilities in Informix ODBC Driver
    - Global Language Support
      HCL Informix® products can support many languages, cultures, and code sets. Global Language Support (GLS) provides support for all language- and culture-specific information.
    - X/Open standard interface
      In addition to the standard ODBC functions, the HCL Informix® ODBC Driver also supports the additional functions.
    - External authentication
      For HCL Informix® Version 10.0 and later, you can implement external authentication through the HCL Informix ODBC Driver.
    - Bypass ODBC parsing
      You can bypass ODBC parsing by using several options.
    - BufferLength in character for SQLGetDiagRecW
      The SQLGetDiagRecW API returns diagnostic information in the output buffer, where the BufferLength parameter is the length of buffer allocated.
    - Informix® and ISAM error descriptions in SQLGetDiagRec
      The SQLGetDiagRec API returns diagnostic information in the output buffer, where the error description is for the HCL Informix® error message.
    - Improved performance for single-threaded applications
      You are likely to improve the performance of single-threaded applications by using the SINGLETHREADED connection parameter. The value is off by default.
    - Partially supported and unsupported ODBC features
      HCL Informix® ODBC Driver supports partial implementation of several ODBC features.
  - Configure data sources
    These topics explain how to configure a data source (DSN) on UNIX™ and Windows™ for HCL Informix® ODBC Driver.
  - Data types
    These topics contain information about the data types that are supported by HCL Informix® ODBC Driver.
  - Smart large objects
    These topics describe how to store, create, and access a smart large object; how to transfer smart-large-object data; how to retrieve the status of a smart large object; and how to read or write a smart large object to or from a file.
  - Rows and collections
    Rows and collections are composite values that consist of one or more elements.
  - Client functions
    These topics describe the HCL Informix® ODBC Driver client functions. Use these functions to access and manipulate smart large objects and rows and collections.
  - Application tracking in ODBC
    Set the CLIENT_LABEL environment variable in CSDK 4.50.xC4 onwards to assign a character string to ODBC client session and identify that character string on the database server. You can use this variable to distinguish one database session from the other.
  - Improve application performance
    These topics suggest ways to improve performance of HCL Informix® ODBC Driver applications.
  - Error messages
    These topics describe the HCL Informix® ODBC Driver error messages.
  - Unicode
    These topics provide a brief overview of the Unicode standard and shows how it is used within ODBC applications.
  - ODBC Smart trigger
- 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.
- 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.

HCL Informix® ODBC Driver components

HCL Informix® ODBC Driver includes the four components.

HCL Informix® ODBC Driver includes the following components:

Environment variables
Header files
Data types
Libraries