[ https://issues.apache.org/jira/browse/FLINK-10250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16596089#comment-16596089 ]
Fabian Hueske commented on FLINK-10250: --------------------------------------- Hi [~LaiAng], Thanks for your questions and welcome to the Flink community. *Please register at the [user mailing list|https://flink.apache.org/community.html#mailing-lists] and post them there.* The Flink community does not use Jira as a discussion forum but as a tracker for bugs, improvements, and features. Flink won't support {{RichAggregateFunction}} because the function is internally used to combine state at different places. Hence, users cannot reason about where and when methods like {{open()}} (which might have side effects) are invoked. I'll close this issue as "Not an Issue". Thanks, Fabian > Flink doesn't support functions that extend RichAggregateFunction in a group > window > ----------------------------------------------------------------------------------- > > Key: FLINK-10250 > URL: https://issues.apache.org/jira/browse/FLINK-10250 > Project: Flink > Issue Type: Improvement > Components: DataStream API > Affects Versions: 1.5.2, 1.5.3, 1.6.0 > Reporter: PengYang > Priority: Major > > Flink doesn't support functions that extend RichAggregateFunction in a group > window,in the RichAggregateFunction via state store data and fliter out the > duplicate data .The Flink will support this feature in a future release?There > is another question whether flink supports global state state query in the > future?If flink supports global state queries, it can replace redis these > external caches In certain aspects.Maybe my thoughts are a little naive, but > I hope that the function of flink is getting better and better -- This message was sent by Atlassian JIRA (v7.6.3#76005)