'Tuples pages fetched' presentation slideshows

Implementation of Relational Operations

Implementation of Relational Operations. CS186, Fall 2005 R&G - Chapter 14. First comes thought; then organization of that thought, into ideas and plans; then transformation of those plans into reality. The beginning, as you will observe, is in your imagination.

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Overview of Query Evaluation

Overview of Query Evaluation. R&G Chapter 12 Lecture 13. Administrivia. Exams graded HW2 due in a week No Office Hours Today. Query Optimization and Execution. Relational Operators. Files and Access Methods. Buffer Management. Disk Space Management. DB. Review: Storage.

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Overview of Query Evaluation

Overview of Query Evaluation. Chapter 12. Overview of Query Evaluation. Plan : Tree of R.A. ops, with choice of alg for each op. Two main issues in query optimization: For a given query, what plans are considered ?

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Overview of Query Evaluation

Overview of Query Evaluation. Chapter 12. Objectives. Catalog Preliminaries: Core query processing techniques Access paths to data Index matching Summary of query processing algorithms Selection Projection Join Introduction to query optimization Query plans Alternative query plans.

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Overview of Query Evaluation

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Evaluation of Relational Operations: Other Techniques

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Evaluation of Relational Operations: Other Techniques

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Evaluation of Relational Operations: Other Techniques

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Evaluation of Relational Operations: Non-Join Operations

Evaluation of Relational Operations: Non-Join Operations. Chapter 14, Part A. Using an Index for Selections. Cost depends on #qualifying tuples, and clustering. Cost of finding qualifying data entries (typically small) plus cost of retrieving records (could be large w/o clustering).

199 views • 12 slides

Evaluation of Relational Operations: Other Techniques

Evaluation of Relational Operations: Other Techniques. Chapter 14, Part B. Using an Index for Selections. Cost depends on #qualifying tuples, and clustering. Cost of finding qualifying data entries (typically small) plus cost of retrieving records (could be large w/o clustering).

190 views • 11 slides