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  • Book Overview & Buying IBM DB2 9.7 Advanced Application Developer Cookbook
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IBM DB2 9.7 Advanced Application Developer Cookbook

IBM DB2 9.7 Advanced Application Developer Cookbook

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IBM DB2 9.7 Advanced Application Developer Cookbook

IBM DB2 9.7 Advanced Application Developer Cookbook

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Buy this Book

Overview of this book

With lots of new features, DB2 9.7 delivers one the best relational database systems in the market. DB2 pureXML optimizes Web 2.0 and SOA applications. DB2 LUW database software offers industry leading performance, scale, and reliability on your choice of platform on various Linux distributions, leading Unix Systems like AIX, HP-UX and Solaris and MS Windows platforms. This DB2 9.7 Advanced Application Developer Cookbook will provide an in-depth quick reference during any application's design and development. This practical cookbook focuses on advanced application development areas that include performance tips and the most useful DB2 features that help in designing high quality applications. This book dives deep into tips and tricks for optimized application performance. With this book you will learn how to use various DB2 features in database applications in an interactive way.
Table of Contents (15 chapters)
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IBM DB2 9.7 Advanced Application Developer Cookbook
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IBM DB2 9.7 Advanced Application Developer Cookbook
Credits
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Credits
About the Authors
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About the Authors
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Application Development Enhancements in DB2 9.7
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Application Development Enhancements in DB2 9.7
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Introduction
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Changing column names online using the ALTER TABLE operation
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Using the CREATE OR REPLACE clause while creating objects
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Using the ALTER TABLE operation in a single transaction
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Using the CREATE WITH ERROR support
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Using the soft invalidation and automatic revalidation support
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Using the ALTER COLUMN SET DATA TYPE extended support
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Using the new TRUNCATE statement
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Using AUTONOMOUS transactions
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Using implicit casting during application enablement
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Using the DEFAULT values and NAMED arguments in procedures
2
DB2 Application Techniques
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DB2 Application Techniques
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Introduction
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Granting and revoking instance-level authorities
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Granting and revoking database-level authorities
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Granting and revoking object privileges
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Implementing static SQL in DB2
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Implementing dynamic SQL in DB2
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Creating Declared Global Temporary Tables (DGTTs)
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Using XML in a declared temporary table
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Improving performance by creating indexes on a DGTT
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Creating Created Global Temporary Tables (CGTT)
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Using generated columns in tables
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Creating a savepoint
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Rolling back to a savepoint
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Using savepoints in JDBC
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Using savepoints in SQLJ
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Creating a sequence object
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Modifying a sequence object
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Referencing a sequence object
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General Application Design
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General Application Design
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Introduction
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Improving concurrency by using a connection concentrator
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Using trusted contexts for improved security
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Using trusted connections in JDBC
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Using trusted connections in PHP
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Securing data by using DB2 encryption
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Improving concurrency by using enhanced optimistic locking
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Working with user-defined types (UDT)
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Working with structured types
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Procedures, Functions, Triggers, and Modules
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Procedures, Functions, Triggers, and Modules
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Introduction
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Creating a simple stored procedure
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Using dynamic SQL in stored procedures
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Working with result sets in stored procedures
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Using ARRAY objects in stored procedures
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Handling errors in stored procedures
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Designing external stored procedures
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Using PL/SQL exception handling in a procedure
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Working with the message buffer in stored procedures
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Planning and designing triggers
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Using scalar user-defined functions
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Writing external user-defined functions
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Designing external table functions
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Working with modules in DB2
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Designing Java Applications
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Designing Java Applications
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Introduction
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Creating connection objects in JDBC applications
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Creating connection objects in SQLJ applications
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Manipulating XML Data in Java applications
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Batch processing in JDBC applications
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Batch processing in SQLJ applications
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Working with scrollable result sets
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Handling errors and warnings in JDBC applications
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Developing Java applications for high availability
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Using SSL in Java applications
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DB2 9.7 Application Enablement
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DB2 9.7 Application Enablement
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Introduction
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First step towards enabling Oracle application to DB2 9.7
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Using ROWNUM and DUAL in DB2 9.7
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Using CUR_COMMIT concurrency control isolation level
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Implementing hierarchical queries for recursion support
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Using PL/SQL ANONYMOUS block statements
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Handling RAISE_APPLICATION_ERROR in DB2 PL/SQL
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Migrating Oracle database objects on to DB2 9.7
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Porting multi-action triggers from Oracle to DB2 9.7
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Advanced DB2 Application Features and Practices
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Advanced DB2 Application Features and Practices
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Introduction
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Working with OLAP functions
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Using optimizer profiles
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Using explain utilities
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Using section explain information
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Interpreting db2exfmt output
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Application development in partitioned databases
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Preparing and Monitoring Database Applications
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Preparing and Monitoring Database Applications
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Introduction
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Preparing applications for execution
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Rebinding existing packages
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Customizing application behavior using registry variables
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Monitoring application performance
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Advanced Performance Tuning Tips
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Advanced Performance Tuning Tips
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Introduction
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Understanding predicates in SQL statements
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Improving INSERT performance
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Writing effective SQL statements

Improving INSERT performance

Many-a-times, we have requirements for a bulk load of data. DB2 provides different utilities for loading data, such as import, load, and so on. Each of these utilities have their own advantages and disadvantages. Import is preferred for a low volume of data, whereas load is commonly used for a high volume of data. But, load makes the database non-recoverable, as it does not log anything. Because of this, many application designs do not prefer load, and hence the only option available is to use import or regular inserts. In such cases, we can use some techniques to improve INSERT performance. This recipe will focus on these techniques.

Getting Ready

Before we discuss the INSERT performance, we should know the basics of DB2 storage. The lowest storage unit in DB2 is a page. A page is a block of physical memory located in a tablespace container. A table can have data in multiple pages, but one page can have rows from only one table. As and when the data comes...

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