When developing your Transformer, it is possible to view intermediate results by utilizing the preview functionality in the Transformer editor. To use the Transformer Preview, place your cursor at a line number in your script uptill where the Transformer should execute. In the example below, the cursor is placed at line numer 27:
Make sure to select a Preview Date for which data is available in the system. Then execute the preview by clicking the Update and Preview button.
By default, the preview will load the first 1000 records for each DSET being imported. In case you want to increase / decrease this amount, you can do so by adjusting the value in the Output Limit field:
Additionally, the preview will by default return the contents of the Default DSET. In case you prefer to preview a static DSET, you can control this by selecting a custom DSET from the drop down selector: