Suppose a relation is stored in a B+-tree file organization. Suppose secondaryindices store record identifiers that are pointers to records on disk. a. What would be the effect on the secondary indices if a node split happenedin the file organization?b. What would be the cost of updating all affected records in a secondaryindex?c. How does using the search key of the file organization as a logical recordidentifier solve this problem?d. What is the extra cost due to the use of such logical record identifiers?
Suppose a relation is stored in a B+-tree file organization. Suppose secondaryindices store record identifiers that are pointers to records on disk. a. What would be the effect on the secondary indices if a node split happenedin the file organization?b. What would be the cost of updating all affected records in a secondaryindex?c. How does using the search key of the file organization as a logical recordidentifier solve this problem?d. What is the extra cost due to the use of such logical record identifiers?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Suppose a relation is stored in a B+-tree file organization. Suppose secondary indices store record identifiers that are pointers to records on disk. a. What would be the effect on the secondary indices if a node split happened in the file organization? b. What would be the cost of updating all affected records in a secondary index? c. How does using the search key of the file organization as a logical record identifier solve this problem? d. What is the extra cost due to the use of such logical record identifiers? |
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