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Experimenting with recursive queries in database and logic programming systems

Published online by Cambridge University Press:  01 March 2008

G. TERRACINA ,
N. LEONE ,
V. LIO  and
C. PANETTA
G. TERRACINA
Affiliation:
Dipartimento di Matematica, Università della Calabria, Via P. Bucci, 87030, Rende (CS), Italy (e-mail: terracina@mat.unical.it, leone@mat.unical.it, lio@mat.unical.it, panetta@mat.unical.it)
N. LEONE
Affiliation:
Dipartimento di Matematica, Università della Calabria, Via P. Bucci, 87030, Rende (CS), Italy (e-mail: terracina@mat.unical.it, leone@mat.unical.it, lio@mat.unical.it, panetta@mat.unical.it)
V. LIO
Affiliation:
Dipartimento di Matematica, Università della Calabria, Via P. Bucci, 87030, Rende (CS), Italy (e-mail: terracina@mat.unical.it, leone@mat.unical.it, lio@mat.unical.it, panetta@mat.unical.it)
C. PANETTA
Affiliation:
Dipartimento di Matematica, Università della Calabria, Via P. Bucci, 87030, Rende (CS), Italy (e-mail: terracina@mat.unical.it, leone@mat.unical.it, lio@mat.unical.it, panetta@mat.unical.it)
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Abstract

This article considers the problem of reasoning on massive amounts of (possibly distributed) data. Presently, existing proposals show some limitations: (i) the quantity of data that can be handled contemporarily is limited, because reasoning is generally carried out in main-memory; (ii) the interaction with external (and independent) Database Management Systems is not trivial and, in several cases, not allowed at all; and (iii) the efficiency of present implementations is still not sufficient for their utilization in complex reasoning tasks involving massive amounts of data. This article provides a contribution in this setting; it presents a new system, called DLVDB, which aims to solve these problems. Moreover, it reports the results of a thorough experimental analysis we have carried out for comparing our system with several state-of-the-art systems (both logic and databases) on some classical deductive problems; the other tested systems are LDL++, XSB, Smodels, and three top-level commercial Database Management Systems. DLVDB significantly outperforms even the commercial database systems on recursive queries.

Keywords

Deductive Database SystemsAnswer Set Programming/Declarative Logic Programmingrecursive queriesbenchmarks
Type
Regular Papers
Information
Theory and Practice of Logic Programming , Volume 8 , Issue 2 , March 2008 , pp. 129 - 165
Copyright
Copyright © Cambridge University Press 2007

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