Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Chapter 22, Problem 8PE
Explanation of Solution
Efficient ways to minimize or avoid repartitioning:
- The aggregate can be computed for each node locally without making any repartitioning.
- The partitioning on s.B implies to the partitioning on s.A,s.B.
- Understanding why the partitioning on the (A,B) required that tuples to be with the same value for (A,B) is that it should be in the same partition.
- Partitioning made just on B by ignoring A will also need to satisfy the requirement...
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