Hi Peter,
Indeed I am interested in having an indicator *while executing*.
For example, I issue a long-running query that operates on a large dataset, then go out to lunch

When I come back the query is still running, but I'm interested in the time spend executing/waiting _so far_.
It would be nice if such a counter was updated every second. However, for display a format like HH:MM:SS is more readable, since I don't want to convert large second numbers into a more intuitive form like "x hours and y minutes".