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https://issues.apache.org/jira/browse/FLINK-22719?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17348032#comment-17348032
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Andy commented on FLINK-22719:
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[~lzljs3620320] I agree with you, If join has two window nodes as input nodes,
however join condition does not satisfy window join condition restrict, it
could fall back to regular join.
> WindowJoinUtil.containsWindowStartEqualityAndEndEquality should not throw
> exception
> -----------------------------------------------------------------------------------
>
> Key: FLINK-22719
> URL: https://issues.apache.org/jira/browse/FLINK-22719
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Reporter: Jingsong Lee
> Priority: Major
> Fix For: 1.14.0
>
>
> This will broke regular join sql.
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