HailDB is a relational database that is embeddable within applications. You embedÂ HailDB by linking to a shared library and calling a clean and simple API.Â HailDB is a continuation of theÂ Embedded InnoDB project. It is not itself a database server, but is a library implementing the storage layer. With the addition of theÂ HailDB plugin to Drizzle you get a full SQL interface.
Read more at http://www.haildb.com