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Learning Pentaho Data Integration 8 CE

By : Carina Roldán

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Buy this Book

Learning Pentaho Data Integration 8 CE

5 (5)

By: Carina Roldán

Buy this Book

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.

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

Getting Started with Pentaho Data Integration

Pentaho Data Integration and Pentaho BI Suite

Installing PDI

Launching the PDI Graphical Designer - Spoon

Introducing transformations

Installing useful related software

Summary

Getting Started with Transformations

Designing and previewing transformations

Understanding PDI data and metadata

Handling errors

Summary

Creating Basic Task Flows

Introducing jobs

Designing and running jobs

Running transformations from a Job

Understanding and changing the flow of execution

Managing files

Knowing the basics about Kettle variables

Summary

Reading and Writing Files

Reading data from files

Outputting data to files

Working with Big Data and cloud sources

Summary

Manipulating PDI Data and Metadata

Manipulating simple fields

Working with complex structures

Summary

Controlling the Flow of Data

Filtering data

Splitting streams unconditionally

Splitting the stream based on conditions

Merging streams in several ways

Looking up data

Summary

Cleansing, Validating, and Fixing Data

Cleansing data

Validating data

Treating invalid data by splitting and merging streams

Summary

Manipulating Data by Coding

Doing simple tasks with the JavaScript step

Parsing unstructured files with JavaScript

Doing simple tasks with the Java Class step

Getting the most out of the Java Class step

Avoiding coding using purpose-built steps

Summary

Transforming the Dataset

Sorting data

Working on groups of rows

Converting rows to columns

Normalizing data

Going forward and backward across rows

Summary

Performing Basic Operations with Databases

Connecting to a database and exploring its content

Previewing and getting data from a database

Inserting, updating, and deleting data

Verifying a connection, running DDL scripts, and doing other useful tasks

Looking up data in different ways

Summary

Loading Data Marts with PDI

Preparing the environment

Introducing dimensional modeling

Loading dimensions with data

Loading fact tables

Summary

Creating Portable and Reusable Transformations

Defining and using Kettle variables

Creating reusable Transformations

Making the data flow between transformations

Executing transformations in an iterative way

Summary

Implementing Metadata Injection

Introducing metadata injection

Discovering metadata and injecting it

Identifying use cases to implement metadata injection

Summary

Creating Advanced Jobs

Enhancing your processes with the use of variables

Accessing copied rows for different purposes

Working with filelists

Executing jobs in an iterative way

Summary

Launching Transformations and Jobs from the Command Line

Using the Pan and Kitchen utilities

Supplying named parameters and variables

Using command-line arguments

Sending the output of executions to log files

Automating the execution

Summary

Best Practices for Designing and Deploying a PDI Project

Setting up a new project

Best practices to design jobs and transformations

Maximizing the performance

Deploying the project in different environments

Summary

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Manipulating simple fields

As already said, transformations deal with the data flow. As data goes through the PDI steps of a Transformation, it is manipulated or transformed in different ways. You already experimented with some possibilities. In this section, you will learn in detail how to transform different data according to your needs.

Working with strings

For any string, there are many transformations that you can apply to it, for example:

Extracting part of the string
Removing leading spaces
Converting to uppercase

PDI offers several ways to do this. It's also common to find more than one step that can be used for the same purpose. The following table summarizes the most common PDI steps used to operate...