This did not solve my problem.
As you can see TurnRow component just turned 4 columns but I could have thousands of them.
Since the moderation is in place, we have stopped to publish unexpected components in Talend Exchange.
The custom component tTurnRow has been cleaned from Talend Exchange Portal, which is not able to be installed into studio since version 3.1.
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Introduction to Talend Open Studio for Data Integration.