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CMPT 454

CMPT 454

Query Optimization. CMPT 454. Query Optimization. Introduction Query Execution Unary Operations External Sorting Binary Operations. Query Compilation Steps. Parsing Construct a parse tree for a query Generate equivalent logical query plans

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1.17k views • 95 slides
Query Compilation

Query Compilation

Query Compilation. Evaluating Logical Query Plan Physical Query Plan. Source: our textbook, slides by Hector Garcia-Molina. Outline. Convert SQL query to a parse tree Semantic checking: attributes, relation names, types

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516 views • 41 slides
Query Compilation

Query Compilation

Query Compilation. Evaluating Logical Query Plan Physical Query Plan. Source: our textbook, slides by Hector Garcia-Molina. Outline. Convert SQL query to a parse tree Semantic checking: attributes, relation names, types

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497 views • 41 slides
Restore ? R eusing results of mapreduce jobs

Restore ? R eusing results of mapreduce jobs

Restore ? R eusing results of mapreduce jobs. Jun Fan. Outline. Introduction to MapReduce. MapReduce and its implementations such as Hadoop are common in Facebook , Yahoo, and Google as well as smaller companies

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377 views • 27 slides
16.5 Introduction to Cost-based plan selection

16.5 Introduction to Cost-based plan selection

16.5 Introduction to Cost-based plan selection. Amith KC Student Id: 109. Whether selecting a logical query plan or constructing a physical query plan from a logical plan, the query optimizer needs to estimate the cost of evaluating certain expressions.

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377 views • 19 slides
Darko Jardas , M.Sc., Director Invest forum of the Primorje-Gorski Kotar County

Darko Jardas , M.Sc., Director Invest forum of the Primorje-Gorski Kotar County

Darko Jardas , M.Sc., Director Invest forum of the Primorje-Gorski Kotar County and the City of Rijeka Opatija , October 30, 2013.

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344 views • 17 slides

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