1. Chapter 14: Query Optimization Database System Concepts 5th Ed. ©Silberschatz, Korth and SudarshanSee www.db-book.com for conditions on re-use 2. Chapter 14: Query OptimizationIntroductionTransformation…

Database Techniek Query Optimization (chapter 14) Notes 4 Lecture 3 Query Rewriting Equivalence Rules Query Optimization Dynamic Programming (System R/DB2) Heuristics (Ingres/Postgres)…

Slide 1Substitution & Evaluation Order cos 441 David Walker Slide 2 Reading Pierce Chapter 5: –5.1: intro, op. sem., evaluation order –5.2: encodings of booleans,…

Distributed Query Processing Agenda Recap of query optimization Transformation rules for P&D systems Memoization Queries in heterogenous systems Query evaluation strategies…

Internal nodes are Executed when inputs are ready - Replaced by results + Different representation for the same algebra expression … assumed to be the initial form There…

Database Techniek Query Optimization (chapter 14) Notes 4 Lecture 3 Query Rewriting Equivalence Rules Query Optimization Dynamic Programming (System R/DB2) Heuristics (Ingres/Postgres)…

Chapter 14: Query Optimization 14.* Chapter 14: Query Optimization Introduction Transformation of Relational Expressions Catalog Information for Cost Estimation Statistical…

Substitution & Evaluation Order cos 441 David Walker Reading Pierce Chapter 5: 5.1: intro, op. sem., evaluation order 5.2: encodings of booleans, pairs, numbers, recursion…

Algebraic Simplification Lecture 12 Richard Fateman CS 282 Lecture 12 Simplification is fundamental to mathematics Numerous calculations can be phrased as “simplify this…

Internal nodes are Executed when inputs are ready - Replaced by results + Different representation for the same algebra expression … assumed to be the initial form There…