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The results of each intermediate operation are created and then are used for evaluation of the next-level operations. This is called

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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

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This interesting question is from Evaluation of Expressions topic in section Query Processing Techniques of Database Management

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Correct option is (a) Materialized evaluation

Easy explanation - The cost of a materialized evaluation is not simply the sum of the costs of the operations involved.

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