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Learning Pentaho Data Integration 8 CE

You're reading from   Learning Pentaho Data Integration 8 CE An end-to-end guide to exploring, transforming, and integrating your data across multiple sources

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788292436
Length 500 pages
Edition 3rd Edition
Languages
Tools
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Author (1):
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María Carina Roldán María Carina Roldán
Author Profile Icon María Carina Roldán
María Carina Roldán
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Table of Contents (17) Chapters Close

Preface 1. Getting Started with Pentaho Data Integration FREE CHAPTER 2. Getting Started with Transformations 3. Creating Basic Task Flows 4. Reading and Writing Files 5. Manipulating PDI Data and Metadata 6. Controlling the Flow of Data 7. Cleansing, Validating, and Fixing Data 8. Manipulating Data by Coding 9. Transforming the Dataset 10. Performing Basic Operations with Databases 11. Loading Data Marts with PDI 12. Creating Portable and Reusable Transformations 13. Implementing Metadata Injection 14. Creating Advanced Jobs 15. Launching Transformations and Jobs from the Command Line 16. Best Practices for Designing and Deploying a PDI Project

Avoiding coding using purpose-built steps


You saw through the exercises how powerful the JavaScript and Java Class steps are to help you in your transformations. In older versions of PDI, coding JavaScript was the only means you had for specific tasks. In the latest releases of PDI, actual steps appeared that eliminate the need to code in many cases. Here you have some examples of these steps:

  • Formula step: Before the appearance of this step, there were a lot of functions, such as the right or left text function, that you could solve only with JavaScript
  • Analytic Query: This step offers a way to retrieve information from rows before or after the current row
  • Split field into rows: This step is used to create several rows from a single string value
  • Add value fields changing sequence: Similar to the Add sequence step, but the sequence value resets each time a value in the list of specified fields changes

Other steps have enhanced their capabilities. For example, the number of available calculations...

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