[reading review] Velox: Meta's Unified Execution Engine

In this paper, the authors design Velox, an extensible C++ library to accelerate database query execution. Velox does not provide SQL parser, query optimizer, and other traditional DBMS components. It takes physical plans as input and produces output for queries. Velox provides consistent, reusable and high-performance data processing components to data users. It does not own data itself, but can deal with different existing data format as input.

• Strengths: Velox is highly extensible, reusable and high-performance, which makes it easy to maintain and do further development.

• Future works: Velox can do further development to integrate with ML platforms and can do more optimizations during adaptive query execution.