Book Image

Learning Pentaho Data Integration 8 CE - Third Edition

By : Carina Roldán
Book Image

Learning Pentaho Data Integration 8 CE - Third Edition

By: Carina Roldán

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 (17 chapters)

Making the data flow between transformations

In this section, you will learn a very simple but useful technique to allow the data flow from one Transformation to another. In other words, you will learn to create a very simple process flow.

For this tutorial, we will continue using the sample file that we just used to learn about sub-transformations.

Transferring data using the copy/get rows mechanism

The copy/get rows mechanism allows you to transfer data between two Transformations, creating a process flow. The following figure shows you how it works:

Copying and getting rows

There is a Copy rows to result step that transfers your rows of data to the outside of the Transformation. Then you can pick that data using...