Prof. Dr. h.c. Hasso Plattner

Jan Kossmann, M.Sc.

Research Assistant, PhD Candidate

  Phone: +49 (331) 5509-1323
  Fax: +49 (331) 5509-579
  Email: jan.kossmann(at)hpi.de
  Room: V-2.02 (Campus II)

Research Topics

  • In-Memory Databases
  • Self-Adaptive Database Systems


  • Schlosser, R., Kossmann, J., Boissier, M.: Efficient Scalable Multi-Attribute Index Selection Using Recursive Strategies. IEEE 35th International Conference on Data Engineering (ICDE 2019). pp. 1238-1249. IEEE (2019).
  • Kossmann, J., Schlosser, R.: A Framework for Self-Managing Database Systems. ICDE workshop (Self-Managing Databases). pp. 100-106 (2019).
  • Dreseler, M., Kossmann, J., Boissier, M., Klauck, S., Uflacker, M., Plattner, H.: Hyrise Re-engineered: An Extensible Database System for Research in Relational In-Memory Data Management. 22nd International Conference on Extending Database Technology (EDBT). pp. 313-324 (2019).
  • Kossmann, J.: Self-Driving: From General Purpose to Specialized DBMSs. Proceedings of the VLDB 2018 PhD Workshop co-located with the 44th International Conference on Very Large Databases (VLDB 2018), Rio de Janeiro, Brasil, Aug 27-31, 2018 (2018).
  • Dreseler, M., Kossmann, J., Frohnhofen, J., Uflacker, M., Plattner, H.: Fused Table Scans: Combining AVX-512 and JIT to Double the Performance of Multi-Predicate Scans. Joint Workshop of HardBD (International Workshop on Big Data Management on Emerging Hardware) and Active (Workshop on Data Management on Virtualized Active Systems), in conjunction with ICDE (2018).
  • Kossmann, J., Dreseler, M., Gasda, T., Uflacker, M., Plattner, H.: Visual Evaluation of SQL Plan Cache Algorithms. Australasian Database Conference (ADC) (2018).
  • Dreseler, M., Gasda, T., Kossmann, J., Uflacker, M., Plattner, H.: Adaptive Access Path Selection for Hardware-Accelerated DRAM Loads. Australasian Database Conference (ADC) (2018).
  • Mueller, S., Fritzsche, M., Kossmann, J., Schneider, M., Striebel, J., Baudisch, P.: Scotty: Relocating Physical Objects Across Distances Using Destructive Scanning, Encryption, and 3D Printing. TEI '15 Proceedings of the Ninth International Conference on Tangible, Embedded, and Embodied Interaction. pp. 233-240 (2015).
  • Schwalb, D., Kossmann, J., Faust, M., Klauck, S., Uflacker, M., Plattner, H.: Hyrise-R: Scale-out and Hot-Standby through Lazy Master Replication for Enterprise Applications. Proceedings of the 3rd VLDB Workshop on In-Memory Data Mangement and Analytics (IMDM), in conjunction with VLDB 2015 Kohala Coast, Hawaii (2015).

Supervised Master's Theses


  • Evaluation of Index Selection Algorithms


  • Learned Cost Models for Query Optimization
  • Cardinality Estimation and Access Avoidance in Horizontally Partitioned IMDBs
  • Adaptive Query Optimization for In-Memory Databases
  • Probabilistic Data Structures for In-Memory Databases
  • Just-in-Time Compilation for Efficient Query Plan Execution of OLAP Workloads in Column Stores
  • Heterogenous Index Distribution in Multi-Node In-Memory Database Systems
  • Building an SQL Interface and Leveraging Query Plan Caching for a Relational Database

Master's Thesis

  • Self-Tuned Index Selection for the Columnar In-Memory Database Hyrise