Hannes Mühleisen

About

Hannes Mühleisen 🔈 is a creator of the DuckDB database management system and Co-founder and CEO of DuckDB Labs. He is also a senior researcher at the Centrum Wiskunde & Informatica (CWI) in Amsterdam.

Selected Talks

• Minus Three Tier: Data Architecture Turned Upside Down (PyData Amsterdam 2025)
• Liberate Analytical Data Management with DuckDB (Data Council 2025)
• A Short Summary of the Last Decades of Data Management (GOTO Amsterdam 2024)

Recent Blog Posts

• Relational Charades: Turning Movies into Tables
• DuckLake: SQL as a Lakehouse Format
• The Lost Decade of Small Data?
• Parquet Bloom Filters in DuckDB

Selected Publications

• Saving Private Hash Join, Laurens Kuiper, Paul Groß, Peter Boncz, and Hannes Mühleisen, 51st International Conference on Very Large Data Bases (VLDB2025), 2025
• Runtime-Extensible Parsers, Hannes Mühleisen and Mark Raasveldt, Conference on Innovative Data Systems Research (CIDR), 2025
• Data Management for Data Science - Towards Embedded Analytics, Mark Raasveldt and Hannes Mühleisen, Conference on Innovative Data Systems Research (CIDR), 2020 [pdf]
• DuckDB: an Embeddable Analytical Database, Mark Raasveldt and Hannes Mühleisen, 2019 ACM SIGMOD/PODS International Conference on Management of Data (SIGMOD'19, Demo), 2019 [pdf]
• Don't Hold My Data Hostage - A Case For Client Protocol Redesign, Mark Raasveldt and Hannes Mühleisen, 43rd International Conference on Very Large Data Bases (VLDB2017), 2017 [pdf]
• Vectorized UDFs in Column-Stores, Mark Raasveldt and Hannes Mühleisen, 28th International Conference on Scientific and Statistical Database Management (SSDBM2016), 2016 [pdf]