Daniël ten Wolde

Bluesky | LinkedIn | Google Scholar

Current activities:

• Software Engineer at DuckDB Labs (June 2025 - Present)
• PhD student at CWI's Database Architectures group (Oct 2022 - Present)
  • PhD topic: Integrating graph processing in relational query engines
  • Currently working on DuckPGQ, a DuckDB extension for graph workloads with support for SQL/PGQ

Past Activities

• Research intern at Google Cloud working on Spanner Graph (August 2023 - November 2023)
• MSc graduate in Computer Science (Track: Big Data Engineering) at Vrije Universiteit Amsterdam (September 2020 - August 2022)
  • Master thesis: Integrating SQL/PGQ into DuckDB
• BSc graduate in Computer Science (cum laude) at Vrije Universiteit Amsterdam (September 2017 - August 2020)

Publications:

• DuckPGQ: Efficient Property Graph Queries in an analytical RDBMS at CIDR 2023 Amsterdam (Video)
• DuckPGQ: Bringing SQL/PGQ to DuckDB at VLDB 2023 Vancouver
• Adaptive Factorization Using Linear-Chained Hash Tables at CIDR 2025 Amsterdam

Presentations:

• DuckCon #6 Amsterdam: Slides, Video
• LDBC 19th TUC Meeting 2024 London: Slides, Video
• DBDBD 2022 Utrecht: Slides
• LDBC 15th TUC meeting at SIGMOD 2022 Philadelphia: Slides, Video

Daily supervisor of:

• MSc student Yiming Wu: Seamlessly and Efficiently Integrating DuckDB with Graph Neural Network Libraries
• MSc student Pingan Ren: Parallelized Path-Finding in DuckPGQ
• MSc student Paul Groß: Dynamically Exploiting Factorized Representations
• MSc student Thijs Dreef: Path-finding on GPUs for Database Systems