writing the result into the output object instead of just echoing it out.

lib/Doctrine/DBAL/Tools/Console/Command/RunSqlCommand.php

@@ -78,6 +78,11 @@ EOT
             $resultSet = $conn->executeUpdate($sql);
         }
 
+        ob_start();
         \Doctrine\Common\Util\Debug::dump($resultSet, (int) $depth);
+        $output = ob_get_contents();
+        ob_end_clean();
+
+        $output->write();
     }
 }