Supersonic Query Engine

Introduction

Supersonic is an ultra-fast, column oriented query engine library written in C++. It provides a set of data transformation primitives which make heavy use of cache-aware algorithms, SIMD instructions and vectorised execution, allowing it to exploit the capabilities and resources of modern, hyper pipelined CPUs. It is designed to work in a single process.
Supersonic is intended to be used as a back-end for various data warehousing projects. The functionalities it provides are:

• speed
• cache consciousness
• instruction pipelining
• SIMD use
• efficient memory allocation
• custom data structures

• reliability
• failure handling
• high test coverage (under development)

• robustness
• support for standard columnar database operations
• a wide range of specialised expressions (including many math, string and date manipulation functionalities) 

https://code.google.com/p/supersonic/