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Chapter 14 Query Optimization

Chapter 14 Query Optimization. Chapter 14: Query Optimization. Introduction Statistical (Catalog) Information for Cost Estimation Estimation of Statistics Cost-based optimization Revisiting Selection Algorithms Transformation of Relational Expressions and Equivalence rules

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Chapter 14 Query Optimization

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CSCI 5708: Query Processing I

CSCI 5708: Query Processing I. Pusheng Zhang University of Minnesota Email: pusheng@cs.umn.edu Feb 3, 2004. Outline. Basic Steps in Query Processing Measures of Query Cost Strategies for relational operations and Cost Analysis Select Operation External Sorting Join Operation

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