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1999
ACM

Cost Models DO Matter: Providing Cost Information for Diverse Data Sources in a Federated System

9 years 3 months ago
Cost Models DO Matter: Providing Cost Information for Diverse Data Sources in a Federated System
An important issue for federated systems of diverse data sources is optimizing cross-source queries, without building knowledge of individual sources into the optimizer. This paper describes a framework through which a federated system can obtain the necessary cost and cardinality information for optimization. Our framework makes it easy to provide cost information for diverse data sources, requires few changes to a conventional optimizer and is easily extensible to a broad range of sources. We believe our framework for costing is the first to allow accurate cost estimates for diverse sources within the context of a traditional cost-based optimizer.
Mary Tork Roth, Fatma Ozcan, Laura M. Haas
Added 05 Aug 2010
Updated 05 Aug 2010
Type Conference
Year 1999
Where VLDB
Authors Mary Tork Roth, Fatma Ozcan, Laura M. Haas
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