The results of each intermediate operation are created and then are used for evaluation of the next-level operations. This is called
A. Materialized evaluation
B. Expression evaluation
C. Tree evaluation
D. Tree materialization
Answer:A
The results of each intermediate operation are created and then are used for evaluation of the next-level operations. This is called
A. Materialized evaluation B. Expression evaluation C. Tree evaluation D. Tree materialization
Explanation: The cost of a materialized evaluation is not simply the sum of the costs of the operations involved .