Transitioning: Informix 4GL to Enterprise Generation Language (EGL)

An IBM Redbooks publication

Published 22 July 2005, updated 03 August 2005

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ISBN-10: 0738491055
ISBN-13: 9780738491059
IBM Form #: SG24-6673-00
(908 pages)

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Authors: Chuck Ballard, Vlaunir Da Silva, Daniel M. Farrell, Alexander Koerner, Jonathan Sayles


In this IBM Redbooks publication, we describe how Informix customers can upgrade their 4GL application development environment to the Rational Software Development platform, and, more specifically, transition to the Rational Enterprise Generation Language (EGL).

EGL provides just the right balance of simplicity and flexibility, and enables application developers to focus on solving business problems rather than expending time and energy on technology.

For example, Informix 4GL developers who are unfamiliar with Java can use EGL to quickly build data-driven Web applications and business logic. They can then write and debug their applications in EGL, and the Java code will be generated for them. So they can then build dynamic Web applications without having to learn the Java language. This provides significant advantages, enabling clients to minimize application development time and resource requirements.

We give you an overview of EGL, its concepts and operations, and walk you through a step-by-step tutorial to develop an simple Web application. Included is an overview of the 4GL to EGL migration process and a sample application migration. You will be alerted to potential migration issues, and given the information to resolve them.

We also include guidance for working with special database behavior and requirements, JasperReports, and a number of advanced EGL topics for developing robust and individualized applications.

Table of contents

Part 1. Introduction and overview
Chapter 1. Introduction
Chapter 2. IBM Informix 4GL
Chapter 3. Rational Software Development Platform
Chapter 4. Installing and configuring RAD
Chapter 5. Redbook 4GL reference application
Part 2. EGL basics and a simple EGL Web application
Chapter 6. Introduction to IBM EGL
Chapter 7. EGL language concepts
Chapter 8. The EGL build environment
Chapter 9. Simple Web application setup
Chapter 10. Simple Web application
Part 3. Informix 4GL to EGL conversion
Chapter 11. The 4GL to EGL conversion process
Chapter 12. Converting the redbook sample 4GL application to EGL
Chapter 13. Special conversion topics
Chapter 14. How to deploy an EGL Batch or CUI application
Chapter 15. EGL and IDS database server
Chapter 16. EGL and JasperReports
Chapter 17. Changing database server in the EGL application
Part 4. From character based to Web / advanced EGL
Chapter 18. Web enhancements to the Example_01 application
Chapter 19. How to enhance the converted 4GL application
Chapter 20. How to deploy an EGL Web application
Chapter 21. Additional EGL features
Appendix A. 4GL/EGL syntax comparison
Appendix B. EGL functions for database developers
Appendix C. EGL and Cloudscape
Appendix D. Additional material

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