Talend Open Studio Cookbook

Chapter 4. Mapping Data

This chapter contains recipes that show some of the techniques used to map input data to the desired output format.

• Simple mapping and tMap time savers
• Creating tMap expressions
• Using the ternary operator for conditional logic
• Using intermediate variables in tMap
• Filtering input rows
• Splitting an input row into multiple outputs based upon input conditions
• Joining data using tMap
• Hierarchical join using tMap
• Using reload at each row to process real-time/near real-time data

Introduction

This chapter mainly deals with the tMap component which is usually the main processing component at the heart of any Talend transformation job.

The tMap component

The tMap component has extensive transformation capabilities and has thus become the data ...