Im going to ask the waiter a question.
Do you need something him?
Yeah, I want a glass of red wine
It is pretty rude to demand things from waiters knowing they are there to take care of you. You should try to treat them with respect as they are attempting to give you the best service they can regardless.
Im going to get anything. And I'm also going to leave a small tip.
Some restaurants are really busy so he is trying his hardest to serve you and the other guests. If it isn't important maybe you could ask the bartender?