Github user zhangminglei commented on the issue:
https://github.com/apache/flink/pull/5449
Sorry, @NicoK I tried the ```NULL``` situation. It seems wont work.---
Github user zhangminglei commented on the issue:
https://github.com/apache/flink/pull/5449
Sorry, @NicoK I tried the ```NULL``` situation. It seems wont work.---