Act on the view immediately after the query has been executed.
At this point the query has been executed, but the pre_render() phase has not yet happened for handlers.
Output can be added to the view by setting $view->attachment_before and $view->attachment_after.
\Drupal\views\ViewExecutable $view: The view object about to be processed.
Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.
function hook_views_post_execute(ViewExecutable &$view) {
// If there are more than 100 results, show a message that encourages the user
// to change the filter settings.
// (This action could be performed later in the execution process, but not
// earlier.)
if ($view->total_rows > 100) {
drupal_set_message(t('You have more than 100 hits. Use the filter settings to narrow down your list.'));
}
}