[IEEE 2017 IEEE 2nd International Conference on Big Data Analysis (ICBDA) - Beijing, China (2017.3.10-2017.3.12)] 2017 IEEE 2nd International Conference on Big Data Analysis (ICBDA)( - Improving penalty function of R-tree over generalized index search tree possible way to advance performance of PostgreSQL cube extensionBorodin, Andrey; Mirvoda, Sergey; Porshnev, Sergey; Bakhterev, Mikhail · 2017