Consider the construction in Section 3.5.2 that shows how to simulate three-parent joint creation using two-parent joint creation . In the original paper, crC(s, c) = c/R3 (that is, the t right was omitted) and link2(S, A3) = A3/t ∈ dom(S) (that is, the C/t ∈ dom(C) predicate is omitted). Why won’t this work?
Consider the construction in Section 3.5.2 that shows how to simulate three-parent joint creation using two-parent joint creation . In the original paper, crC(s, c) = c/R3 (that is, the t right was omitted) and link2(S, A3) = A3/t ∈ dom(S) (that is, the C/t ∈ dom(C) predicate is omitted). Why won’t this work?
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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Consider the construction in Section 3.5.2 that shows how to simulate three-parent joint creation using two-parent joint creation . In the original paper, crC(s, c) = c/R3 (that is, the t right was omitted) and link2(S, A3) = A3/t ∈ dom(S) (that is, the C/t ∈ dom(C) predicate is omitted). Why won’t this work?
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A construction in Section 3.5.2 of a text that simulates three-parent joint creation using two-parent joint creation. The original paper had two formulas, crC(s, c) = c/R3 and link2(S, A3) = A3/t ∈ dom(S), but with some omitted terms.
Task:
Explain why the construction in the original paper, with the omitted terms, won't work.
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