Is it slower if you access a record through ALT INDEX as
compared to Primary INDEX? Why?
Answer Posted / scott
If you are reading more than one record it is potentially
slower using the ALT INDEX. The reason is the primary index
is clustered, so you do not perform an I/O when you get the
next record in the index.
| Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
how do you create an alternate index ?
Differentiate between ci split and ca split?
What are the advantages of vsam over isam?
What is the main purpose of having user catalog in vsam?
OPEN INPUT StudentFile READ StudentFile AT END SET EndOfStudentFile TO TRUE END-READ PERFORM UNTIL EndOfStudentFile DISPLAY StudentId SPACE StudentName SPACE CourseCode SPACE YOBirth READ StudentFile AT END SET EndOfStudentFile TO TRUE END-READ END-PERFORM CLOSE StudentFile STOP RUN what will be output
what do you mean by the cobol record key clause in vsam?
explain the information contained in ci
explain in brief how you can create a vsam file?
what are the idcams commands that can be used for vsam and explain each of them.
Explain about the file objects in vsam?
Explain the difference between lds and esds?
What is speed parameters in define cluster command?
What is the purpose of idcams?
what do you mean by idcams? Explain its purpose?
What is the main function of key sequenced data set in vsam?