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Consider the join of 4 relations R ( a , b ) , S ( b , c ) , T ( c , d
Consider the join of relations and where and each have
tuples, while and T each have tuples. Further, the number of values of each attribute
is shown in the table below. To simplify the analysis, we assume the cost of a plan is the total
cost of writing out intermediate results ie we ignore the implementation details of physical
operators
a points What is the best leftdeep join order and its cost?
b points Is the above plan you developed the best plan among all possible join orders? If
not, what is the best join order and its cost?
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