The primary way of executing the Denodo Testing Tool is from the command prompt and can offer reports in console, csv, email or HTML. Currently, you cannot integrate Denodo Testing tool with TestRail.
I would integrate the Denodo test set executions with JUNIT by using the **com.denodo.connect.testing.TestRunne**r class.
For more details, you can refer to section TESTING TOOL EXECUTION in the user manual available in the /doc directory of the Denodo Testing tool zip folder.
Hope this helps!