responsible for producing a single tuple. To start you call next() on the root operator (projection in this case). It
Что думаешь? Оцени!
。关于这个话题，体育直播提供了深入分析
What drives this? Am I just bored?，这一点在搜狗输入法中也有详细论述
management.endpoint.threads.show-details=always