About ODPI-C

Oracle Database Programming Interface for C (ODPI-C) is an open source library of C code that simplifies the use of common Oracle Call Interface (OCI) features for Oracle Database drivers and user applications. The ODPI-C project is open source and maintained by Oracle Corp.


See ODPI-C Installation.


See ODPI-C Documentation and Release Notes.


See the samples directory.


Please report bugs and ask questions using GitHub issues.


To run the test suite see test/README.

Source code

Download source from GitHub.

A sample Makefile is provided if you wish to build ODPI-C as a shared library. Otherwise, include the ODPI-C source code in your project. ODPI-C uses the shared library loading mechanism available on each supported platform to load the Oracle Client library at runtime. This allows code using ODPI-C to be built only once, and then run using Oracle Client 11.2, 12.1 and 12.2, 18c, 19c and 21c libraries.

Oracle Client libraries are available in the free Oracle Instant Client "Basic" and "Basic Light" packages. Client libraries are also available in any Oracle Database installation or full Oracle Client installation.

ODPI-C has been tested on Linux, Windows and macOS. Other platforms should also work but have not been tested. On Windows, Visual Studio 2008 or higher is required. On macOS, Xcode 6 or higher is required. On Linux, GCC 4.4 or higher is required.

Drivers Using ODPI-C

Oracle Drivers

Third-party Drivers

ODPI-C Features


Copyright (c) 2016, 2024, Oracle and/or its affiliates. All rights reserved.

This program is free software: you can modify it and/or redistribute it under the terms of:

(i) the Universal Permissive License v 1.0 or at your option, any later version (http://oss.oracle.com/licenses/upl); and/or

(ii) the Apache License v 2.0. (http://www.apache.org/licenses/LICENSE-2.0)