[ https://issues.apache.org/jira/browse/FLINK-20110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17235892#comment-17235892 ]
Jark Wu commented on FLINK-20110: --------------------------------- Hi [~hailong wang], do you want to try this? > Support 'merge' method for first_value and last_value UDAF > ---------------------------------------------------------- > > Key: FLINK-20110 > URL: https://issues.apache.org/jira/browse/FLINK-20110 > Project: Flink > Issue Type: Improvement > Components: Table SQL / Planner > Affects Versions: 1.12.0 > Reporter: hailong wang > Priority: Major > > From the user-zh email, when use first_value function in hop window, It > throws the exception because first_vaue does not implement the merge method. > We can support 'merge' method for first_value and last_value UDAF -- This message was sent by Atlassian Jira (v8.3.4#803005)