Talend Open Studio Cookbook

Rejecting rows using tMap

This recipe shows how tMap can be used to ensure that unwanted rows are not propagated downstream. This may be as a result of the filter criteria or a validation rule.

Getting ready

Open the job jo_cook_ch03_0030_tMapRejects.

How to do it…

1. Open the tMap and click the Activate/unactivate expression filter button for the validRows output.
2. In the Expression box add the code customer.age >= 18.
   
3. Click on the tMapRejects output and then on the tMapSettings button.
4. Click on Catch output reject value column to set it to true.
   
5. Run the job. ...