Hi, all. I would like to start the vote to approve FLIP-566: Introduce a new IMMUTABLE columns constraint[1]. The discussion thread[2] has been active for a while and received some positive feedback, and the proposal is ready for a formal vote. The vote will be open for at least 72 hours.
[1] https://cwiki.apache.org/confluence/display/FLINK/FLIP-566%3A+Introduce+a+new+IMMUTABLE+columns+constraint [2] https://lists.apache.org/thread/vws45zvrvbzjxm2zcbk715go8fll2qx4 -- Best！ Xuyang
