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 17, Problem 9PE
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Scenario in which a nonserializable execution occurs in bank
- Consider a scenario where the bank enforces integrity constraint that the sum of the balances in the checking and the savings account of a customer must not be negative.
- Suppose the checking balance is $100 and savings balance is $200.
- Suppose the T1 transaction withdraws $200 from the checking account. It is done after checking the integrity constraint by reading both balances.
- Suppose the concurrent transaction T2 withdraws $200 from the checking account after verifying the integrity constraint by reading both the balances...
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