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Explain what the problem is in the table above! Including type What is the problem? Make a solution with 2PL. How much the sum is

Explain what the problem is in the table above! Including type What is the problem? Make a solution with 2PL. How much the sum is

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
Problem 1PE
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Explain what the problem is in the table above! Including type
What is the problem? Make a solution with 2PL. How much the sum is

T1 T2 T3 Bal_x Bal_y Sum begin_tran Sum = 0 t1 150 75 t2 begin_tran read(Bal_x) 150 75 read(Bal_x) Sum = Sum + Bal_x begin_tran read(Bal_y) Bal_y = Bal_y + t3 150 75 t4 Bal _x = Bal x - 25 150 75 150 %3D write(Bal_x) read(Bal_y) Sum = Sum + Bal_y t5 20 125 75 150 t6 commit write(Bal_y) 125 95 225 t7 commit commit 125 95 225
Transcribed Image Text:T1 T2 T3 Bal_x Bal_y Sum begin_tran Sum = 0 t1 150 75 t2 begin_tran read(Bal_x) 150 75 read(Bal_x) Sum = Sum + Bal_x begin_tran read(Bal_y) Bal_y = Bal_y + t3 150 75 t4 Bal _x = Bal x - 25 150 75 150 %3D write(Bal_x) read(Bal_y) Sum = Sum + Bal_y t5 20 125 75 150 t6 commit write(Bal_y) 125 95 225 t7 commit commit 125 95 225
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