Data exchange: On the complexity of answering queries with inequalities

被引：10
|
作者：
Madry, A [1 ]
机构：
[1] Univ Wroclaw, Inst Comp Sci, PL-50138 Wroclaw, Poland
来源：
INFORMATION PROCESSING LETTERS | 2005年 / 94卷 / 06期
关键词：
data exchange; query answering; certain answers; computational complexity;
D O I：
10.1016/j.ipl.2005.03.001
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The complexity of answering Boolean queries and the local-as-view (LAV) setting, which is a special case of the general data exchange problem setting, is described. It is observed that the certain answers for queries being unions of conjunctive queries can be computed in polynomial time. There is a polynomial-time algorithm for computing the certain answers of unions of conjunctive queries with at most one inequality per disjunct. Thus the minimal number of inequalities giving rise to co-NP-hardness of this problem is at least two and six at most.
引用
收藏
页码：253 / 257
页数：5
相关论文
共 50 条
  • [31] Answering Multiple-Item Queries in Data Broadcast Systems
    Omotayo, Adesola
    Barker, Ken
    Hammad, Moustafa
    Higham, Lisa
    Kawash, Jalal
    DATASPACE: THE FINAL FRONTIER, PROCEEDINGS, 2009, 5588 : 120 - 132
  • [32] Data Complexity of Query Answering in Description Logics
    Calvanese, D.
    De Giacomo, G.
    Lembo, D.
    Lenzerini, M.
    Rosati, R.
    PROCEEDINGS OF THE TWENTY-FOURTH INTERNATIONAL JOINT CONFERENCE ON ARTIFICIAL INTELLIGENCE (IJCAI), 2015, : 4163 - 4167
  • [33] Data complexity of query answering in description logics
    Calvanese, Diego
    De Giacomo, Giuseppe
    Lembo, Domenico
    Lenzerini, Maurizio
    Rosati, Riccardo
    ARTIFICIAL INTELLIGENCE, 2013, 195 : 335 - 360
  • [34] The Complexity of Answering Conjunctive and Navigational Queries over OWL 2 EL Knowledge Bases
    Stefanoni, Giorgio
    Motik, Boris
    Kroetzsch, Markus
    Rudolph, Sebastian
    JOURNAL OF ARTIFICIAL INTELLIGENCE RESEARCH, 2014, 51 : 645 - 705
  • [35] Answering Planning Queries with the Crowd
    Kaplan, Haim
    Lotosh, Ilia
    Milo, Tova
    Novgorodov, Slava
    PROCEEDINGS OF THE VLDB ENDOWMENT, 2013, 6 (09): : 697 - 708
  • [36] Answering ordered tree pattern queries over fuzzy XML data
    Liu, Jian
    Ma, Z. M.
    Feng, Xue
    KNOWLEDGE AND INFORMATION SYSTEMS, 2015, 43 (02) : 473 - 495
  • [37] Answering Conceptual Queries with Ferret
    de Alwis, Brian
    Murphy, Gail C.
    ICSE'08 PROCEEDINGS OF THE THIRTIETH INTERNATIONAL CONFERENCE ON SOFTWARE ENGINEERING, 2008, : 21 - 30
  • [38] Cooperative Answering of Fuzzy Queries
    Narjes Hachani
    Mohamed Ali Ben Hassine
    Hanène Chettaoui
    Habib Ounelli
    JournalofComputerScience&Technology, 2009, 24 (04) : 675 - 686
  • [39] Answering queries using views
    Afrati, Foto
    Chirkova, Rada
    Synthesis Lectures on Data Management, 2018, 9 (02): : 1 - 237
  • [40] XML data exchange: Consistency and query answering
    Arenas, Marcelo
    Libkin, Leonid
    JOURNAL OF THE ACM, 2008, 55 (02)
12345