Write 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 between calls.
Answer to relevant QuestionsDesign sorting based and hashing algorithms for computing the division operation.Suppose that a B+-tree index on (branch-name, branch-city) is available on relation branch. What would be the best way to handle the following selection? σ (branch-cityShow that, if only left-deep join trees are considered, as in the System R optimizer, the time taken to find themost efficient join order is around n2n.Assume that there is only one interesting sort order.Database-system implementers have paid much more attention to the ACID properties than have file-system implementers. Why might this be the case?Consider the following two transactions:T31: read (A); read (B);If A = 0 then B: = B + 1; write (B).T32: read (B); read (A);If B = 0 then A: = A + 1; write (A).Add lock and unlock instructions to transactions T31 and T32, so ...
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