NDLI: Entropy-based histograms for selectivity estimation

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Entropy-based histograms for selectivity estimation

Content Provider	ACM Digital Library
Author	To, Hien Chiang, Kuorong Shahabi, Cyrus
Abstract	Histograms have been extensively used for selectivity estimation by academics and have successfully been adopted by database industry. However, the estimation error is usually large for skewed distributions and biased attributes, which are typical in real-world data. Therefore, we propose effective models to quantitatively measure bias and selectivity based on information entropy. These models together with the principles of maximum entropy are then used to develop a class of entropy-based histograms. Moreover, since entropy can be computed incrementally, we present the incremental variations of our algorithms that reduce the complexities of the histogram construction from quadratic to linear. We conducted an extensive set of experiments with both synthetic and real-world datasets to compare the accuracy and efficiency of our proposed techniques with many other histogram-based techniques, showing the superiority of the entropy-based approaches for both equality and range queries.
Starting Page	1939
Ending Page	1948
Page Count	10
File Format	PDF
ISBN	9781450322638
DOI	10.1145/2505515.2505756
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-10-27
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Histograms Selectivity estimation Entropy models
Content Type	Text
Resource Type	Article

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