'Relation plans' presentation slideshows

Query Optimization

Query Optimization. Application Programmer (e.g., business analyst, Data architect). Application. Sophisticated Application Programmer (e.g., SAP admin). Query Processor. Indexes. Storage Subsystem. Concurrency Control. Recovery. DBA, Tuner. Operating System.

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Relational Query Optimization (this time we really mean it)

Relational Query Optimization (this time we really mean it). R&G Chapter 15 Lecture 25. Administrivia. Homework 5 mostly available It will be due after classes end, Monday 12/8 Only 3 more lectures left! Next Tuesday: Physical Database Tuning Following Tuesday: Real-World Databases

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Overview of Query Optimization

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CS222 P : Principles of Data Management UCI, Fall 2018 Notes # 13 Query Optimization (System-R)

CS222 P : Principles of Data Management UCI, Fall 2018 Notes # 13 Query Optimization (System-R). Instructor: Chen Li. System R Optimizer. Impact: Most widely used currently; works well for < 10 joins. Cost estimation: An approximate art at best ( ?).

224 views • 22 slides

Instructor: Chen Li

CS222 /CS122C : Principles of Data Management UCI, Fall 2018 Notes # 13 Query Optimization (System-R). Instructor: Chen Li. System R Optimizer. Impact: Most widely used currently; works well for < 10 joins. Cost estimation: An approximate art at best ( ?).

236 views • 22 slides

Relational Query Optimization

Relational Query Optimization. Query Processing: Topic 2. Overview of Query Optimization. Plan : Tree of R.A. ops, with choice of alg for each op.

334 views • 21 slides

Relational Query Optimization

Relational Query Optimization. Query Processing: Topic 2. Overview of Query Optimization. Plan : Tree of R.A. ops, with choice of alg for each op.

219 views • 21 slides

Relational Query Optimization

Relational Query Optimization. Chapter 15. Highlights of System R Optimizer. Impact: Most widely used currently; works well for < 10 joins. Cost estimation: Approximate art at best. Statistics, maintained in system catalogs, used to estimate cost of operations and result sizes.

198 views • 19 slides

Relational Query Optimization

Relational Query Optimization. Chapters 14. Query Blocks: Units of Optimization. SELECT S.sname FROM Sailors S WHERE S.age IN ( SELECT MAX (S2.age) FROM Sailors S2 GROUP BY S2.rating ).

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CS4432: Database Systems II

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Relational Query Optimization II: Size Estimation and Plan Generation

Relational Query Optimization II: Size Estimation and Plan Generation. Size Estimation and Reduction Factors. SELECT attribute list FROM relation list WHERE term1 AND ... AND termk. Consider a query block:

125 views • 11 slides