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Abstract: In data-integration systems, information sources often have various constraints such as "all houses stored at a source have a unique address." These constraints are very useful to compute answers to queries. In this paper we study how to describe these constraints, so that they can be utilized in query processing and optimization. We consider the local-as-view approach to data integration (under the open-world assumption), in which source contents and user queries are formulated on... (Update)
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BibTeX entry: (Update)
@misc{ li-describing,
author = "Chen Li",
title = "Describing and Utilizing Constraints to Answer Queries in Data-Integration
Systems",
url = "citeseer.ist.psu.edu/578438.html" }
Citations (may not include all citations):296 Answering queries using views - Levy, Mendelzon et al. - 1995
266 Information integration using logical views - Ullman - 1997
119 Logic-based approach to semantic query optimization (context) - Chakravarthy, Grant et al. - 1990
119 Data integration: A theoretical perspective (context) - Lenzerini - 2002
116 Answering recursive queries using views - Duschka, Genesereth - 1997
88 Mediators in the architecture of future information systems - Wiederhold - 1992
88 Principles of Database and Knowledge-base Systems (context) - Ullman - 1988
80 Template-based wrappers in the TSIMMIS system - Hammer, GarciaMolina et al. - 1997
68 What can databases do for peer-to-peer (context) - Gribble, Halevy et al. - 2001
22 Answering queries using views over description logics knowle.. - Calvanese, De Giacomo et al. - 2000
15 Query rewriting using views in the presence of functional an.. (context) - Gryz - 1999
7 Answering queries using views with arithmetic comparisons - Afrati, Li et al. - 2002
5 Resolving constraint conflicts in the integration of entityr.. (context) - Lee, Ling - 1997
3 Scalable view expansion in a peer mediator system - Katchaounov, Josifovski et al. - 2003
3 Exploiting constraint-like data characterizations in query o.. - Godfrey, Gryz et al. - 2001
2 Integrity Constraint Checking in Deductive Databases Using t.. (context) - Ling - 1987
2 Semantic query optimization for query plans of heterogeneous.. - Hsu, Knoblock - 2000
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