Cost Estimation of User-Defined Methods in Advanced Database Systems

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概要

• 論文の詳細を見る

• In this paper we present a novel technique for cost estimation of user-defined methods in advanced database systems. This technique is based on multi-dimensional histograms. We explain how the system collects statistics on the method that a database user defines and adds to the system. From these statistics a multi-dimensional histogram is built. Afterwards, this histogram can be used for estimating the cost of the target method whenever this last is referenced in a query. This cost estimation is needed by the optimizer of the database system since this last needs to know the cost of a method in order to place it at its optimal position in the Query Execution Plan (QEP). We explain here how our technique works and we provide an example to better verify its functionality.

• 国立情報学研究所の論文

著者

• Ono Kinji

  National Center For Science Information Systems

• Boulos J

  National Center For Science Information Systems

• Boulos Jihad

  National Center For Science Information Systems (nacsis)

• Boulos Jihad

  National Center for Science Information Systems

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