Cost-based relational query optimizer (CBO) evaluating nested loop, hash join, and sort-merge joins.
Cost-based relational query optimizer (CBO) evaluating nested loop, hash join, and sort-merge joins.
DBest is an interactive database engine designed for creating, visualizing, and executing query plans. This engine enables users to design query execution plans through an intuitive drag-and-drop interface, making it easier to understand query execution, optimize performance, and integrate diverse data sources.
C++ hash join pipeline for the SIGMOD 2025 Programming Contest. Robin Hood, Hopscotch, Cuckoo and Unchained hash tables over a column store with late materialization, plus parallel build and probing with work stealing. Around 16x faster than the std::unordered_map baseline.
a mini query execution engine that simulates how a database system processes queries internally using Java. It supports queries like "SELECT A.x, B.y FROM A, B WHERE A.id = B.id AND A.value > 50;".
Semester project of "Experimental Study on Stream Joins" at EPFL
immutable leapfrog triejoin in Clojure
SIGMOD Contest 2025 Winning Solution
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