Hi, all Thanks for your reply.
1. Can i ask how does the SQL like below transform to a low-level datastream job? 2. If i implement a distinct in datastream job, and there is no keyBy needed advance , and we just calculate the global distinct count, Does i just can used the AllWindowedStream or the SQL above? Thanks, Aitozi -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/