build your own query planner

Adaptive query optimization for PostgreSQL

PilotScope is a middleware to bridge the gaps of deploying AI4DB (Artificial Intelligence for Databases) algorithms into actual database systems.

SQL Parser for C++. Building C++ object structure from SQL statements.

Run the PostgreSQL Explain Visualizer 2 (pev2) from the command line.

Spanning Tree-based Query Plan Enumeration

Code on paper: Eraser: Eliminating Performance Regression on Learned Query Optimizer

Implementation of a SQL Query Optimizer Application for Oracle Database using indexes and plans.

Query rewrite rules for the NebulaStream, an open source stream processing system

The codebase for DBSim

Pytorch implementation of LEON: A New Framework for ML-Aided Query Optimization.

Database Systems Implementation @ NUS SoC

Slides and material for MySQL and MariaDB query optimization.

Laravel package helps you to execute more effective databases queries, delete, update, insert, and optimize your database queries.

Robust Cardinality Estimator by Non-autoregressive Model

A generic query engine for graph data, based on abstract syntax trees as input.

A Relational Optimizer and Executor

CS 562 - DBMS - Extended Multi-Feature Queries Optimizer