[jira] [Commented] (FLINK-21592) RemoveSingleAggregateRule fails due to nullability mismatch
[ https://issues.apache.org/jira/browse/FLINK-21592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17313602#comment-17313602 ] Kurt Young commented on FLINK-21592: [~godfreyhe] could you help to review? >
[jira] [Commented] (FLINK-21592) RemoveSingleAggregateRule fails due to nullability mismatch
[ https://issues.apache.org/jira/browse/FLINK-21592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17295024#comment-17295024 ] Rui Li commented on FLINK-21592: I think the root cause is because