FYI ...

IBM Informix® 12.10.xC2 Enhancements - Introducing NoSQL Capabilities !!!

IBM® Informix® 12.10.xC2, in keeping up with the tradition of its prior versions, continues to evolve and enhance its leading database technology that is powerful, easy to use, and easy to manage. It continues to provide a high quality, high performing database engine for both OLTP and mixed OLTP/OLAP environments. Numerous enhancements were done to strengthen the existing server in the areas of security, administration, embeddability, cloud implementation, availability, application development, and supportability. Significant usability improvements were made available for time series data, and the ability to use external tables was added to the Informix Warehouse Accelerator (IWA) data mart. With the introduction of support for JSON as a native type and the ability to shard collections of documents, Informix has entered into the fast-paced, dynamic domain of NoSQL web and mobile application development, where engaging with customers has moved beyond merely recording transactions.

What's new in IBM Informix version 12.10.xC2 - http://pic.dhe.ibm.com/infocenter/informix/v121/topic/com.ibm.po.doc/new_features_ce.htm

To use the MongoDB clients to access the Informix server, point them to the host and port of the wire listener.
... and so on.

Kind regards,
Vadim.