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Authors: Jing Lu and Bernhard Mitschang

Affiliation: IPVS, University of Stuttgart, Germany

Keyword(s): XML, XQuery, Data Integration, Constraints, Semantic Query Optimization.

Related Ontology Subjects/Areas/Topics: Distributed and Parallel Applications ; Internet Technology ; Web Information Systems and Technologies ; XML and Data Management

Abstract: Web has brought forth opportunities to connect information sources across all types of boundaries. Data integration is to combine data residing at different sources and providing the user with a unified view of these data. Currently users are expecting more efficient services from such data integration systems. This paper describes a query optimizer, which uses constraints to semantically optimize the queries. The optimizer first translates constraints from data sources into constraints expressed at the global level and stores them in the constraint repository. Then the optimizer can use semantic query optimization technologies including detection of empty results, join elimination, and predicate elimination to generate a more efficient but semantically equivalent query for the user. The optmizer is published as a web service and can be invoked by many data integration systems. We carry out experiments and first results show that performance can be greatly improved.

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Paper citation in several formats:
Lu, J. and Mitschang, B. (2008). A CONSTRAINT-AWARE QUERY OPTIMIZER FOR WEB-BASED DATA INTEGRATION. In Proceedings of the Fourth International Conference on Web Information Systems and Technologies - Volume 2: WEBIST; ISBN 978-989-8111-26-5; ISSN 2184-3252, SciTePress, pages 87-92. DOI: 10.5220/0001516400870092

@conference{webist08,
author={Jing Lu. and Bernhard Mitschang.},
title={A CONSTRAINT-AWARE QUERY OPTIMIZER FOR WEB-BASED DATA INTEGRATION},
booktitle={Proceedings of the Fourth International Conference on Web Information Systems and Technologies - Volume 2: WEBIST},
year={2008},
pages={87-92},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001516400870092},
isbn={978-989-8111-26-5},
issn={2184-3252},
}

TY - CONF

JO - Proceedings of the Fourth International Conference on Web Information Systems and Technologies - Volume 2: WEBIST
TI - A CONSTRAINT-AWARE QUERY OPTIMIZER FOR WEB-BASED DATA INTEGRATION
SN - 978-989-8111-26-5
IS - 2184-3252
AU - Lu, J.
AU - Mitschang, B.
PY - 2008
SP - 87
EP - 92
DO - 10.5220/0001516400870092
PB - SciTePress