Abstract
The both-as-view (BAV) approach to data integration has the advantage of specifying mappings between schemas in a bidirectional manner, so that once a BAV mapping has been established between two schemas, queries may be exchanged in either direction between the schemas. In this paper we discuss the reformulation of queries over BAV transformation pathways, and demonstrate the use of this reformulation in two modes of query processing. In the first mode, public schemas are shared between peers and queries posed on the public schema can be reformulated into queries over any data sources that have been mapped to the public schema. In the second, queries are posed on the schema of a data source, and are reformulated into queries on another data source via any public schema to which both data sources have been mapped.
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© 2007 Springer Berlin Heidelberg
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McBrien, P., Poulovassilis, A. (2007). P2P Query Reformulation over Both-As-View Data Transformation Rules. In: Moro, G., Bergamaschi, S., Joseph, S., Morin, JH., Ouksel, A.M. (eds) Databases, Information Systems, and Peer-to-Peer Computing. DBISP2P DBISP2P 2006 2005. Lecture Notes in Computer Science, vol 4125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-71661-7_30
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DOI: https://doi.org/10.1007/978-3-540-71661-7_30
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-71660-0
Online ISBN: 978-3-540-71661-7
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