Talks and Poster Presentations (with Proceedings-Entry):

R. Pichler, S. Skritek:
"Tractable Counting of the Answers to Conjunctive Queries";
Talk: AMW - Alberto Mendelzon International Workshop on Foundations of Data Management, Santiago, Chile; 05-09-2011 - 05-12-2011; in: "CEUR Workshop Proceedings", P. Barceló, V. Tannen (ed.); CEUR Workshop Proceedings, 749 (2011), ISSN: 1613-0073; Paper ID 4, 12 pages.

English abstract:
Conjunctive queries (CQs) are one of the most fundamental forms of database queries. In general, the evaluation of CQs is NP-complete. Consequently, there has been an intensive search for tractable
fragments. In this paper, we want to initiate a systematic search for
tractable fragments of the counting problem of CQs, i.e., the problem
of counting the answers to a CQ. We prove several new tractability and
intractability results by starting with acyclic conjunctive queries and generalising these results to CQs of bounded hypertree-width.

Related Projects:
Project Head Reinhard Pichler:
Service-orientierte Datenintegration

Created from the Publication Database of the Vienna University of Technology.