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https://issues.apache.org/jira/browse/FLINK-22996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17375743#comment-17375743
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Seth Wiesman commented on FLINK-22996:
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fixed in master: 363abf7d41c2907e76831301e3440aafb647cb36
fixed in release-1.13: 0be246bb4baefaea0f6ad903f6a13687278c6b33
> The description about coalesce is wrong
> ---------------------------------------
>
> Key: FLINK-22996
> URL: https://issues.apache.org/jira/browse/FLINK-22996
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 1.13.0
> Reporter: lothar
> Assignee: Svend Vanderveken
> Priority: Major
> Labels: auto-deprioritized-critical, pull-request-available
> Attachments: image-2021-06-15-17-14-56-270.png
>
>
> In Flink website, there is a fault that the description about coalesce
> function.The document link is
> [https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/dev/table/functions/systemfunctions|https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/dev/table/functions/systemfunctions.]
> !image-2021-06-15-17-14-56-270.png!
>
> It should be “{{COALESCE(NULL, 5)}} returns 5”.
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