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https://issues.apache.org/jira/browse/FLINK-19678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17215474#comment-17215474
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Jark Wu commented on FLINK-19678:
---------------------------------
[~yetanotherion], I think it might be in the next two releases.
> tableEnv.getConfig.setNullCheck(false) seems to break group by
> --------------------------------------------------------------
>
> Key: FLINK-19678
> URL: https://issues.apache.org/jira/browse/FLINK-19678
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Runtime
> Affects Versions: 1.11.2
> Reporter: Ion Alberdi
> Priority: Major
>
> The program written at
> [https://gist.github.com/yetanotherion/d007fa113d97411226eaea4f20cd4c2d|https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgist.github.com%2Fyetanotherion%2Fd007fa113d97411226eaea4f20cd4c2d&data=04%7C01%7Cj.alberdi%40criteo.com%7C08c520289ec4433b7b7a08d871c60180%7C2a35d8fd574d48e3927c8c398e225a01%7C1%7C1%7C637384442549853109%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=vQGyO%2FqLQ%2FCN%2BVuQPYbmPVfKDbLxVKmWJh%2Fu9L2qTBw%3D&reserved=0]
> creates unexpected stack traces when the line
> *// triggerBug…*
> is uncommented (some lines of the stack trace are written in the gist).
> (It correctly outputs
> {code:java}
> +-------------+
> | c |
> +-------------+
> | 1 |
> | 2 |
> +-------------+
> {code}
> else)
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