Consider the example on page 435, which shows that there is no need for deswizzling if hardware swizzling is used. Explain why, in that example, it is safe to change the short identifier of page 679.34278 from 2395 to 5001. Can some other page already have short identifier 5001? If it could, how can you handle that situation?
Answer to relevant QuestionsWhen is it preferable to use a dense index rather than a sparse index? Explain your answer.For each B+-tree as shown below show the steps involved in the following queries:a. Find records with a search-key value of 11.b. Find records with a search-key value between 7 and 17, inclusive.(2, 3, 5, 7, 11, 17, 19, 23, ...Show how the extendable hash structure of Exercise changes as the result of each of the following steps:a. Delete 11.b. Delete 31.c. Insert 1.d. Insert 15.Suppose that we are using extendable hashing on a file that contains ...Why is it not desirable to force users to make an explicit choice of a queryprocessing strategy? Are there cases in which it is desirable for users to be aware of the costs of competing query-processing strategies? Explain ...Suppose that a B + - tree index on branch-city is available on relation branch, and that no other index is available. List different ways to handle the following selections that involve negation? a. σ ¬ ((branch-city
Post your question