Question: 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

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 constant time. (If you find this exercise difficult, at least show the looser time bound of O(22n).)

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