Book Image

Pentaho Data Integration Cookbook - Second Edition

Book Image

Pentaho Data Integration Cookbook - Second Edition

Overview of this book

Pentaho Data Integration is the premier open source ETL tool, providing easy, fast, and effective ways to move and transform data. While PDI is relatively easy to pick up, it can take time to learn the best practices so you can design your transformations to process data faster and more efficiently. If you are looking for clear and practical recipes that will advance your skills in Kettle, then this is the book for you. Pentaho Data Integration Cookbook Second Edition guides you through the features of explains the Kettle features in detail and provides easy to follow recipes on file management and databases that can throw a curve ball to even the most experienced developers. Pentaho Data Integration Cookbook Second Edition provides updates to the material covered in the first edition as well as new recipes that show you how to use some of the key features of PDI that have been released since the publication of the first edition. You will learn how to work with various data sources – from relational and NoSQL databases, flat files, XML files, and more. The book will also cover best practices that you can take advantage of immediately within your own solutions, like building reusable code, data quality, and plugins that can add even more functionality. Pentaho Data Integration Cookbook Second Edition will provide you with the recipes that cover the common pitfalls that even seasoned developers can find themselves facing. You will also learn how to use various data sources in Kettle as well as advanced features.
Table of Contents (21 chapters)
Pentaho Data Integration Cookbook Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
References
Index

Executing a job or a transformation by setting static arguments and parameters


When you develop a transformation that reads command-line arguments or defines named parameters, you usually intend to call it more than once with different values for those parameters or arguments. If you know the values beforehand, there is an easy way to call the transformation, as you will see in this recipe. Suppose that you want to create the following three files:

  • First file: Numbers from 1 to 10, incrementing by 1, as in 0, 1,..., 10

  • Second file: Numbers from 0 to 100, incrementing by 20, as in 0, 20, 40,..., 100

  • Third file: Numbers from 100 to 500, incrementing by 100, as in 100, 200,.., 500

You have a transformation that generates sequences like these. You just have to call it three times with the proper arguments and parameters.

Getting ready

You need the sample transformation that generates a file with a sequence described in the introduction.

Make sure you have defined the variable ${OUTPUT_FOLDER} with...