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Pentaho Data Integration 4 Cookbook

You're reading from Pentaho Data Integration 4 Cookbook

Product type Book

Published in Jun 2011

Publisher Packt

ISBN-13 9781849515245

Pages 352 pages

Edition 1st Edition

Languages

Concepts

Data Processing

Table of Contents (17) Chapters

Pentaho Data Integration 4 Cookbook

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

1. Working with Databases

2. Reading and Writing Files

3. Manipulating XML Structures

4. File Management

5. Looking for Data

6. Understanding Data Flows

7. Executing and Reusing Jobs and Transformations

8. Integrating Kettle and the Pentaho Suite

9. Getting the Most Out of Kettle

Data Structures

Index

Comparing files and folders

Kettle allows you to compare files and folders through the following job entries: File Compare and Compare folder. In this recipe, you will use the first of those entries, which is used for comparing the content of two files. Assume that periodically you receive a file with new museums data to incorporate into your database. You will compare the new and the previous version of the file. If the files are equal, you do nothing, but if they are different, you will read the new file.

Getting ready

To create and test this recipe, you will need two files: the older version of the museum file (LastMuseumsFileReceived.xml), and the new file (NewMuseumsFileReceived.xml).

On the book's website, you will find sample files to play with. In particular, NewMuseumsFileReceived(equal).xml is equal to the LastMuseumsFileReceived.xml file, and NewMuseumsFileReceived(different).xml, as implied by its name, is different. With these files, you will be able to test the different situations...

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