Query Execution Professor: Dr T.Y. Lin. Prepared by, Mudra Patel Class id: 113. Topics covered . Preview of Query Compilation Introduction to Physical-Query-Plan Operators Scanning tables Sorting while scanning tables Parameters for measuring costs I/O cost for scan operators
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Class id: 113
A Physical-query-plan operator sort-scantakes a relation R and a specification of the attributes on which the sort is to be made, and produces R in that sorted order.