Copyright © 2004 Pearson Education, Inc.
Chapter 17
Introduction to
Transaction Processing
Concepts and Theory
Copyright © 2004 Pearson Education, Inc.
Introduction to Transaction
Processing
Single-User Versus Multiuser Systems
Transactions, Read and Write Operations,
and DBMS Buffers
Why Concurrency Control Is Needed
Why Recovery Is Needed
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-3
Transaction and System
Concepts
Transaction States and Additional
Operations
The System Log
Commet Point of a Transaction
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-4
Desirable Properties of
Transactions
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-5
Characterizing Schedules
Based on Recoverability
Schedules (Histories) of Transactions
Characterizing Schedules Base on
Recoverability
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-6
Characterizing Schedules
Based on Serializability
Serial, Nonserial, and Conflict-Serializable
Schedules
Testing for Conflict Serializability of a
Schedule
Uses of Serializability
View Equivalence and View Serializability
Other Types of Equivalence of Schedules
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-7
Transaction Support in SQL
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-8
Summary
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 17-9