Computer Science

Computer Science Colloquium

Prof. Dr. Michael Grossniklaus
Universität Konstanz

Citius, Altius, Fortius: Advances in Query Processing

Wed 14.08.2019, 10:15, 90 minutes
JKU, Science Park 3, Raum 134


Answering user questions based on data is one of the most central functionalities of a database system. Starting from a declarative query statement given, for example, in SQL, the query processor explores the search space of possible execution plans. Based on data statistics, it assigns each possible plan an estimated cost and executes the most efficient one. While this basic query optimization strategy has been used successfully in database systems for decades, novel application domains and larger databases required the design and development of new query processing techniques. In this talk, we present recent advances in query processing that enable database management systems (1) to execute queries faster, (2) to support higher-level applications, and (3) to be stronger with respect to cardinality estimation errors.


Michael Grossniklaus is a full professor in the area of Database and Information Systems at the University of Konstanz. After obtaining his doctorate from ETH Zurich, Michael worked as a postdoctoral researcher at the Politecnico di Milano, Portland State University and Technical University of Vienna. He joined the University of Konstanz in 2013. Michael's research focus is on query optimization in database systems and data stream processing. He is a principal investigator of the Konstanz-based Cluster of Excellence ?Centre for the Advanced Study of Collective Behaviour?, director of the one-year continuing education programme in Computer Science, Mathematics, Physics (Kontaktstudium IMP), and co-creator of the Advanced Data and Information Literacy Track for students from all disciplines.
Invited by o.Univ.-Prof. Dr. Michael Schrefl

The Computer Science Colloquium is organized by the Department of Coputer Science at JKU, the Österreichische Gesellschaft für Informatik (ÖGI) and the Österreichische Computergesellschaft (OCG).
List of all talks
Last modified on Thursday, 01-Jan-1970 01:00:00 CET