Chapter 15: Problem 10
Discuss the different types of parameters that are used in cost functions. Where is this information kept?
Chapter 15: Problem 10
Discuss the different types of parameters that are used in cost functions. Where is this information kept?
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Get started for freeHow many different join orders are there for a query that joins 10 relations?
Discuss the cost components for a cost function that is used to estimate query execution cost. Which cost components are used most often as the basis for cost functions?
Can a nondense index be used in the implementation of an aggregate operator? Why or why not?
How does a query tree represent a relational algebra expression? What is meant by an execution of a query tree? Discuss the rules for transformation of query trees, and identify when each rule should be applied during optimization.
Extend the sort-merge join algorithm to implement the left outer join operation.
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