'Plan tree' presentation slideshows

CS186: Introduction to Database Systems

CS186: Introduction to Database Systems. Topic 12: Query Optimization (Book Ch 15). Michael Franklin Fall 2013. Query Optimization Overview. Query can be converted to relational algebra Rel. Algebra converted to tree, joins as branches Each operator has implementation choices

628 views • 48 slides

Query Optimization

Query Optimization. Chapter 15. Query Evaluation. Query. Query Parser. Parsed query. Query Optmizer. Plan Generator. Plan Cost Estimator. Catalog Manager. Evaluation Plan. Query Plan Evaluator. Query Optimization. It is responsible for identifying an efficient execution plan.

419 views • 40 slides

Proactive Re-optimization

Proactive Re-optimization. Research by Shivnath Babu, Pedro Bizarro, David DeWitt. Presented by Pedro Bizarro. Roadmap. Introduction Re-Optimization (and its Limitations) Proactive Re-Optimization Bounding Boxes Robust and Switchable Plans Random Samples Experimental Results

535 views • 38 slides

Introduction to Database Systems CSE 444

370 views • 25 slides