Ramana Yerneni
Hector Garcia-Molina
ABSTRACT
Existing data-integration systems based on the mediation architecture employ a variety of mechanisms to describe the query-processing capabilities of sources. However, these systems do not compute the capabilities of the mediators based on the capabilities of the sources they integrate. In this paper, we proposed a framework to capture a rich variety of query-processing capabilities of data sources and mediators. We present algorithms to compute the set of supported queries of a mediator, based on the capability limitations of its sources. Our algorithms take into consideration a variety of query-processing techniques employed by mediators to enhance the set of supported queries.
- 1.Y. Arens, C. Knoblock, W. Shen. Query Reformulation for Dynamic Information Integration. Journal of Intelligent Information Systems, 6(2/3):99-130, 1996.]] Google Scholar
Digital Library
- 2.M. Genesereth, A. Keller, O. Duschka. lnfomaster: An Information Integration System. Proc. SIGMOD Conference, 1997.]] Google ScholarDigital Library
- 3.O. Kapitskaia, A. Tomasic, P. Valduriez. Scaling Heterogeneous Databases and the Design of Disco. INRIA Technical Report, 1997.]]Google Scholar
- 4.A. Levy, A. Rajaraman, J. Ordille. Querying Heterogeneous Information Sources Using Source Descriptions. Proc. VLDB Conference, 1996.]] Google ScholarDigital Library
- 5.C. Li, R. Yerneni, et al. Capability-Based Mediation in TSIMMIS. Proc. SIGMOD Conference, 1998.]] Google ScholarDigital Library
- 6.Y. Papakonstantinou, H. Garcia-Molina, J. Ullman. Medmaker: A Mediation System Based on Declarative Specifications. Proc. ICDE, 1996.]] Google ScholarDigital Library
- 7.Y. Papakonstantinou, et al. Capabilities-Based Query Rewriting in Mediator Systems. Proc. PDIS Conference, 1996.]] Google ScholarDigital Library
- 8.A. Tomasic, L. Raschid, P. Valduriez. Dealing with Discrepancies in Wrapper Functionality. Proc. ICDCS, 1996.]]Google Scholar
- 9.G. Wiederhold. Mediators in the Architecture of Future Information Systems. IEEE Computer, 25:38-49, 1992.]] Google ScholarDigital Library
- 10.R. Yerneni, C. Li, et al. Extended Version: Computing Capabilities of Mediators. www-db, stanford, edu/Nyerneni/pubs/ccmev, ps.]]Google Scholar
- 11.R. Yerneni, C. Li, et al. Optimizing Large Join Queries in Mediation Systems. Proc. ICDT, 1999.]] Google ScholarDigital Library
Index Terms
- Computing capabilities of mediators
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