loop terminates when no rows are affected by query (if
	    		multiple queries specified, loop terminates when no rows are affected by last of queries).
    			This is in particular useful for DELETE or UPDATE statements, see examples.
    		</li>
    		<li><strong>A positive integer (1, 2, 3, ...)</strong>: loop terminates after given number
    			of iterations.
    		</li>
    		<li><strong>Short time format (e.g. '30s', '45m', '2h')</strong>: loop terminates after
    			specified time has passed. See <