Cost-Based Oracle
Fundamentals
■■■
Jonathan Lewis
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Cost-Based Oracle Fundamentals
Copyright © 2006 by Jonathan Lewis
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Contents at a Glance
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii
About the Author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
About the Technical Reviewers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
■CHAPTER 1 What Do You Mean by Cost? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
■CHAPTER 2 Tablescans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
■CHAPTER 3 Single Table Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
■CHAPTER 4 Simple B-tree Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
■CHAPTER 5 The Clustering Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
■CHAPTER 6 Selectivity Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
■CHAPTER 7 Histograms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
■CHAPTER 8 Bitmap Indexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
■CHAPTER 9 Query Transformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
■CHAPTER 10 Join Cardinality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
■CHAPTER 11 Nested Loops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
■CHAPTER 12 Hash Joins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
■CHAPTER 13 Sorting and Merge Joins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
■CHAPTER 14 The 10053 Trace File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403
■APPENDIX A Upgrade Headaches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453
■APPENDIX B Optimizer Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465
■INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475
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