Book Image

Learning Pentaho Data Integration 8 CE - Third Edition

Book Image

Learning Pentaho Data Integration 8 CE - Third Edition

Overview of this book

Pentaho Data Integration(PDI) is an intuitive and graphical environment packed with drag-and-drop design and powerful Extract-Tranform-Load (ETL) capabilities. This book shows and explains the new interactive features of Spoon, the revamped look and feel, and the newest features of the tool including transformations and jobs Executors and the invaluable Metadata Injection capability. We begin with the installation of PDI software and then move on to cover all the key PDI concepts. Each of the chapter introduces new features, enabling you to gradually get practicing with the tool. First, you will learn to do all kind of data manipulation and work with simple plain files. Then, the book teaches you how you can work with relational databases inside PDI. Moreover, you will be given a primer on data warehouse concepts and you will learn how to load data in a data warehouse. During the course of this book, you will be familiarized with its intuitive, graphical and drag-and-drop design environment. By the end of this book, you will learn everything you need to know in order to meet your data manipulation requirements. Besides, your will be given best practices and advises for designing and deploying your projects.
Table of Contents (23 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Working with filelists


In this section, you will learn about the result filelist, which is a list of files in memory. The purpose of having a result filelist is to apply some operation on the whole set of files in a single step. The kind of operation you can apply ranges from copying the list of files to a new location, to sending the files attached in an email.

In this section, you will learn the ways PDI offers to add or remove files from that custom list, and then you will see a couple of use cases where you can use it.

Maintaining a filelist

You might have noticed that most of the output PDI steps have a checkbox named Add filenames to result, which is checked by default. What this checkbox does, as the name implies, is it adds the name of the generated file to the filelist in memory.

Besides this automatic behavior, there are other ways to add files to the list, and also to remove them. The following table summarizes the steps used to add files to the list:

Transformation step

Description...