The Processing and Improvement of Multi-Statement Queries in Chiql

Chiql is a novel Chinese relational database query language for Chinese users. It supports procedural query style in which users can specify a complex database request in multiple simple statements. This facility renders Chiql simple-to-use and easy-toremember. However, direct execution of multi-statement Chiql queries (i.e. statement by statement) is often inefficient as potential indexbased operations (e.g. join) are by-passed. Furthermore, it often incurs additional database operations, such as scan and …