Book Image

Pentaho Data Integration 4 Cookbook

Book Image

Pentaho Data Integration 4 Cookbook

Overview of this book

Pentaho Data Integration (PDI, also called Kettle), one of the data integration tools leaders, is broadly used for all kind of data manipulation such as migrating data between applications or databases, exporting data from databases to flat files, data cleansing, and much more. Do you need quick solutions to the problems you face while using Kettle? Pentaho Data Integration 4 Cookbook explains Kettle features in detail through clear and practical recipes that you can quickly apply to your solutions. The recipes cover a broad range of topics including processing files, working with databases, understanding XML structures, integrating with Pentaho BI Suite, and more. Pentaho Data Integration 4 Cookbook shows you how to take advantage of all the aspects of Kettle through a set of practical recipes organized to find quick solutions to your needs. The initial chapters explain the details about working with databases, files, and XML structures. Then you will see different ways for searching data, executing and reusing jobs and transformations, and manipulating streams. Further, you will learn all the available options for integrating Kettle with other Pentaho tools. Pentaho Data Integration 4 Cookbook has plenty of recipes with easy step-by-step instructions to accomplish specific tasks. There are examples and code that are ready for adaptation to individual needs.
Table of Contents (17 chapters)
Pentaho Data Integration 4 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Generating all possible pairs formed from two datasets


This is a quick recipe that teaches you how to do a Cartesian product between datasets. By Cartesian product we mean taking all rows from one dataset, all rows from the other, and generate a new dataset with all the possible combinations of rows.

This particular recipe is in fact the implementation of the CAG or Community Acronym Generator as proposed by Nicholas Goodman (@nagoodman) on twitter:

@webdetails @pmalves @josvandongen How about CAG? Community Acronym Generator? A project to generate new acronyms for community projects?!

There are already several community projects around Pentaho such as CDF, CDE, or CDA. Why don't we follow Nicholas's suggestion and develop the CAG as follows:

Given two lists of words, the Kettle transformation will generate all combinations of words that lead to potential community projects.

How to do it...

Carry out the following steps:

  1. Create a new transformation and add two Data Grid steps from the Input category...