Claude Lehmann

Work at ZHAW

Position

Scientific Employee

Focus

• Query Optimization
• Databases
• Machine Learning
• Quantum Computing

Professional development teaching

CEC Quantum Computing

Experience

• Intern
  Microsoft Research
  06 / 2025 - 09 / 2025
• Software Engineer
  Squibble GmbH
  09 / 2015 - 07 / 2019
• Intern
  ILF Consulting Engineers
  01 / 2011 - 08 / 2013

Education and Continuing education

Education

• Master of Science ZFH / Engineering with Specialisation in ICT (Data Science)
  ZHAW Zurich University of Applied Sciences
  09 / 2019 - 08 / 2022
• Bachelor of Science ZFH / Computer Science
  ZHAW Zurich University of Applied Sciences
  09 / 2015 - 08 / 2019

Network

Membership of networks

• ZHAW Datalab
• Quantum Algorithms Expert Group

ORCID digital identifier

ORCID ID: 0000-0002-4693-0444

Projects

• DataGEMS - Data Discovery Platform with Generalized Exploratory, Management, and Search Capabilities (Horizon Europe) / Team member / ongoing
• Digital Health Zurich: a practice lab for patient-centred clinical innovation / Team member / ongoing
• DataInc – Intelligent Data Integration and Cleaning / Team member / completed
• GraphQueryML – Using Machine Learning to Optimize Queries in Graph Databases (SNSF/DFG) / Team member / completed
• NQuest – Natural Language Query Exploration System / Team member / completed
• Decision Support System for Predictive Maintenance of Laser Cutting Machines / Team member / completed

Publications

• Difrancesco, Sonia; Bauert, Matthia Martina; Lehmann, Claude; Häsler, Steven; Zhang, Yi; Hirsch, Sven; Ackermann, Philipp; Stockinger, Kurt; Reif, Monika; Mathieu, Sunjoy; Götz, Anna; Wicki, Andreas; Krauthammer, Michael; Witt, Claudia M.,

  2025.

  Collaborative design and development of a patient-centered digital health app for supportive cancer care : participatory study.

  JMIR Human Factors.

  12(e73829).

  Available from: https://doi.org/10.2196/73829

• Lehmann, Claude; Sulimov, Pavel; Stockinger, Kurt,

  2024.

  Is your learned query optimizer behaving as you expect? : a machine learning perspective.

  Proceedings of the VLDB Endowment.

  17(7), pp. 1565-1577.

  Available from: https://doi.org/10.14778/3654621.3654625

• Lehmann, Claude; Goren Huber, Lilach; Horisberger, Thomas; Scheiba, Georg; Sima, Ana-Claudia; Stockinger, Kurt,

  2020.

  Big data architecture for intelligent maintenance : a focus on query processing and machine learning algorithms.

  Journal of Big Data.

  7(1).

  Available from: https://doi.org/10.1186/s40537-020-00340-7

• Sulimov, Pavel; Lehmann, Claude; Stockinger, Kurt,

  2025.

  GenJoin : conditional generative plan-to-plan query optimizer that learns from subplan hints[paper].

  In:

  Proceedings of the ACM on Management of Data.

  ACM SIGMOD/PODS International Conference on Management of Data, Bengaluru, India, 31 May - 5 June 2026.

  Association for Computing Machinery.

  pp. 247.

  Available from: https://doi.org/10.1145/3749165

• Klingler, Yasamin; Lehmann, Claude; Monteiro, Joao Pedro; Saladin, Carlo; Bernstein, Abraham; Stockinger, Kurt,

  2022.

  Evaluation of algorithms for interaction-sparse recommendations : neural networks don’t always win[paper].

  In:

  Proceedings of EDBT 2022.

  25th International Conference on Extending Database Technology, Edinburgh (online), 29 March - 1 April 2022.

  OpenProceedings.

  pp. 475-486.

  Available from: https://doi.org/10.48786/edbt.2022.42

• Lehmann, Claude; Gehrig, Dennis; Holdener, Stefan; Saladin, Carlo; Monteiro, João Pedro; Stockinger, Kurt,

  2022.

  Building natural language interfaces for databases in practice[paper].

  In:

  Proceedings of the 34th SSDBM.

  34th International Conference on Scientific and Statistical Database Management (SSDBM), Copenhagen, Denmark, 6 - 8 July 2022.

  Association for Computing Machinery.

  Available from: https://doi.org/10.1145/3538712.3538744

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