Describe an efficient way to search for and retrieve records

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Suppose that several secondary indexes exist on non-key fields of a file, implemented using option 3 of Section 18.1.3; for example, we could have secondary indexes on the fields Department_code, Job_code, and Salary of the EMPLOYEE file of Exercise 18.18. Describe an efficient way to search for and retrieve records satisfying a complex selection condition on these fields, such as (Department_code = 5 AND Job_code = 12 AND Salary = 50,000), using the record pointers in the indirection level.

Reference no: EM131053861

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