System r optimizer - PowerPoint PPT Presentation

Query Evaluation Overview, cont.

Query Evaluation Overview, cont. Slides based on “Database Management Systems” 3 rd ed , Ramakrishnan and Gehrke. Architecture of a DBMS. User. SQL Query. Query Compiler. Query Plan (optimized). Execution Engine. Index and Record requests. Index/File/Record Manager. Page Commands.

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383 views • 27 slides

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. Each operator typically implemented using a `pull’ interface: when an operator is `pulled’ for the next output tuples, it `pulls’ on its inputs and computes them.

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353 views • 21 slides

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