Book Image

IBM DB2 9.7 Advanced Application Developer Cookbook

Book Image

IBM DB2 9.7 Advanced Application Developer Cookbook

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)
IBM DB2 9.7 Advanced Application Developer Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface

Preparing applications for execution


A database application coded in a high-level language has SQL statements embedded in it. Before we can execute the application, it is precompiled, bound to the database, and then compiled to generate an assembly code. During the precompilation and binding processes, we have many options that can control the environment for application execution.

Precompilation is the process of separating SQL statements from application logic. Applications that do not have any embedded SQL statements don't need to be precompiled. When an application is precompiled, a bind file is generated. This bind file has information on all SQL statements contained in the application. All SQL statements in the application source file are commented as a result of precompilation and are replaced with DB2 runtime API calls for these statements.

Binding is the process of compiling all SQL statements contained in the bind file. The result of binding is a package. This package contains...