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Pentaho Data Integration 4 Cookbook

You're reading from   Pentaho Data Integration 4 Cookbook Over 70 recipes to solve ETL problems using Pentaho Kettle

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Product type Paperback
Published in Jun 2011
Publisher Packt
ISBN-13 9781849515245
Length 352 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (17) Chapters Close

Pentaho Data Integration 4 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Working with Databases FREE CHAPTER 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

Generating sample data for testing purposes


Having sample data to test your transformations is very useful and allows you to move faster through your development and testing process. There are several cases where you will want to generate sample data, for example:

  • To quickly populate datasets with random data

  • Manually generate specific information

  • Generate large volumes of custom data

  • Take a subset from a large volume of data

In this recipe, you will learn how to generate a dataset with 100 random rows in different formats (integer, string, and dates). Then, in the There's more section, you will find alternative solutions for generating data for testing.

How to do it...

Carry out the following steps:

  1. Create a new transformation.

  2. Drop a Generate rows step from the Input category. Here, set the Limit textbox to 100.

  3. Add a Generate random value step from the Input category. Add two elements to the grid: randomInteger of random integer type, and randomString of random string type.

  4. Doing a preview on this...

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