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[Institut fuer Informatik] [Leerraum] [Humboldt-Universitaet zu Berlin]

Prof. Johann-Christoph Freytag

Institut für Informatik
Humboldt-Universität zu Berlin
Unter den Linden 6
D-10099 Berlin 
Rudower Chaussee 25
D-12489 Berlin 
+49 30 2093-3009 
+49 30 2093-3010 


  • Query optimization and query processing in object-relational DBMSs (ORDBMSs)
  • Privacy support in database systems and information systems
  • Data quality in databases
  • Semantic Web and database systems
  • Databases and Cloud Computing
  • Applications using DBMS technology such as Bioinformatics


As the Professor for Databases and Information Systems at the Humboldt-Universität zu Berlin, I am committed to provide my assistants and my students with the best possible teaching and research environment (see also my teaching guidelines). This commitment includes providing intellectual support, finding necessary resources, and opening up opportunities for further growth. When cooperating with other (academic or industrial) partners I am committed to be a reliable and responsive partner expecting the necessary respect as I respect others for the values and goals they stand for.

Furthermore, I am committed to challenge continuously my assistants and students in their work with the ultimate goal to perform outstanding research leading to outstanding results. I strongly believe that only active participation in the research community by publishing research results and ideas provides the stimulating working environment necessary for excellent research.

Professional Activities

  • Program Committee Chair for VLDB 2003 Conference in Berlin
  • Co-Organizer of the VLDB 2003 Conference in Berlin together with Heinz Schweppe and Peter Lockemann
  • Member of the VLDB Endowment 2002 - 2007
  • Program Committee Chair for the BTW 2009 conference in Münster, Germany
  • Program Committee Member:

VLDB: 1995, 1998, 2001, 2002, 2004, 2005, 2006, 2007, 2008,2009, 2010, 2011

SIGMOD: 1994, 2001 (industrial track), 2005, 2007, 2008

IEEE ICDE: 1995, 1997 (vice-chair), 2001, 2002, 2003, 2005, 2007

Comad: 1994, 2000, 2002

IEEE PDIS (Parallel and Distributed Databases): 1994

SSDBM: 2000, 2001, 2002

EDBT: 1990, 2006, 2008

BTW: 1997, 2005, 2007

Various national and international workshops

  • I am currently head ("Sprecher") of the GI-Fachbereich Datenbanken und Informationssysteme (Gesellschaft für Informatik - German interest group in computer science) in Germany
  • Member of the editorial board of the Journal Datenbankspektrum published by d-punkt Verlag
  • Member of the Editorial Board for the Springer Book Series on Data-centric Systems and Applications
  • Member of the Editorial Board of the Springer Journal Computer Science - Research and Development
  • Visiting Scientist at IBM Silicon Valley Laboratory, San Jose, CA, Summer 2001
  • Visiting Scientist at IBM Almaden Research Center, San Jose, CA, Winter 1997/1998
  • Visiting Scientist at Microsoft Research, Redmond, Washington, February/March 2002
  • Visiting Scientist at Microsoft Research, Redmond, Washington, February-May 2005
  • Visiting Scientist at Microsoft Research, Redmond, Washington, February-April 2007
  • Visiting Scientist at Microsoft SQL Server Development Group, Redmond, Washington, February-April 2008
  • Visiting Faculty at Harvard University, MA, February-April 2009
  • Co-Organizer of the GI-Workshop " E-Commerce: System Support Dealing with Data and Processes in Distributed Application Environments" at the annual GI-conference 2001 in Vienna
  • Organizer of the Workshop on Databases and Data Integration in Genome Research, February 2002 (supported by IBM)
  • Organizer of the following Dagstuhl Workshops:

Query Processing in Object-Oriented, Complex Object, and Nested Relation Databases (with D. Maier and G. Vossen), June 1991

Information and Process Integration: A Life Science Perspective (with R. Apweiler, T. Etzold, C. Goble, P. Schwarz),  January 2003

Perspectives Workshop: Data Mining: The Next Generation (together with R. Agrawal and R. Ramakrishnan), July 2004

Managing and Mining Genome Information: Frontiers in Bioinformatics (with J. Blazewicz and M. Vingron), November 2005

  • Reviewer for various journals including ACM TODS, ACM JACM, PVLDB and the VLDB Journal

Research Participation

  • Co-initiator of the Forschergruppe Stratosphere funded by the DFG (2006 - )
  • Board member and co-initiator of the Graduate School "METRIK" funded by the DFG (2006 - )
  • Board member and co-initiator of the Graduate School "SOAMED" funded by the DFG (2010 - )
  • Co-initiator of the EU funde project "PRECIOSA" funded by the DFG (2010 - )
  • Board member and co-initiator of the BMBF-funded project "INTERVAL" funded by the DFG (2003 - 2007)
  • Member of the Coordination Board for the "Berlin Center for Genome Based Bioinformatics" (BCB) (2000 - 2005)
  • Board member and co-initiator of the Graduate School "Distributed Information Systems" funded by the DFG (1997-2006)
  • Leader of the DFG funded project "Anfragebearbeitung und Optimierung für parallele relationale Datenbanksysteme" (1996 - 2005)




List of publications (For a complete list of publications - especially for 1993 and earlier - please access the DBLP Bibliography Server)

Folien Web und Datenbanken

die Folien meines Vortrages am 19. April 2013 für die BA-Arbeit sind hier zu finden.

Last update:  Thursday, July 11, 2013

[aktiver Punkt]  Prof. Johann-Christoph Freytag

[Punkt]  Jörg Bachmann

[Punkt]  Bruno Cadonna

[Punkt]  Lukas Dölle

[Punkt]  Fabian Fier

[Punkt]  Daniel Janusz

[Punkt]  Martin Kost

[Punkt]  Jan Hendrik Nielsen

[Punkt]  Mathias Peters

[Punkt]  Matthias J. Sax

[Punkt]  Steffen Zeuch

[Punkt]  Christine Henze

[Punkt]  Thomas Morgenstern

[Punkt]  Ralf Heese

[Punkt]  Dr. Stephan Heymann

[Punkt]  Heinz Werner