--- /dev/null
+/**
+ * Implements hook_views_preview_info_alter().
+ */
+function {{ machine_name }}_views_preview_info_alter(array &$rows, ViewExecutable $view) {
+ // Adds information about the tables being queried by the view to the query
+ // part of the info box.
+ $rows['query'][] = [
+ t('<strong>Table queue</strong>'),
+ count($view->query->table_queue) . ': (' . implode(', ', array_keys($view->query->table_queue)) . ')',
+ ];
+}