Question: The hash join algorithm as described in Section computes the
The hash join algorithm as described in Section computes the natural join of two relations. Describe how to extend the hash join algorithm to compute the natural left outer join, the natural right outer join and the natural full outer join. Try out your algorithm on the customer and depositorrelations.
Answer to relevant QuestionsWrite pseudocode for an iterator that implements indexed nested-loop join, where the outer relation is pipelined. Use the standard iterator functions in your pseudocode. Show what state information the iterator must maintain ...Suppose that a B+-tree index on branch-city is available on relation branch, and that no other index is available. What would be the best way to handle the following selections that involve negation? a. σ ¬ ...Show that the lowest-cost join order can be computed in time O(3n). Assume that you can store and look up information about a set of relations (such as the optimal join order for the set, and the cost of that join order) in ...Consider a file system such as the one on your favorite operating system.a. What are the steps involved in creation and deletion of files, and in writing data to a file?b. Explain how the issues of atomicity and durability ...What is a cascade less schedule? Why is cascadelessness of schedules desirable? Are there any circumstances under which it would be desirable to allow non-cascadeless schedules? Explain your answer.
Post your question