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Suppose you need to sort relation r using sort—merge and merge—join the result with an already sorted relation s.The same idea is applicable even if both inputs to the merge join are the outputs of sort—merge operations. However, the available memory has to be shared between the two merge operations (the merge—join algorithm itself needs very little memory). What is the effect of having to share memory on the cost of each sort-merge operation?

Suppose you need to sort relation r using sort—merge and merge—join the result with an already sorted relation s.The same idea is applicable even if both inputs to the merge join are the outputs of sort—merge operations. However, the available memory has to be shared between the two merge operations (the merge—join algorithm itself needs very little memory). What is the effect of having to share memory on the cost of each sort-merge operation?

Database System Concepts
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
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Suppose you need to sort relation r using sort—merge and merge—join the result with an already sorted relation s.The same idea is applicable even if both inputs to the merge join are the
outputs of sort—merge operations. However, the available memory has to
be shared between the two merge operations (the merge—join algorithm
itself needs very little memory). What is the effect of having to share
memory on the cost of each sort-merge operation?

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