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https://issues.apache.org/jira/browse/FLINK-22942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu closed FLINK-22942.
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Release Note: Disabled UPSERT INTO statement. UPSERT INTO syntax was
exposed by mistake in previous releases without detailed discussed. From this
release every UPSERT INTO is going to throw an exception. Users of UPSERT INTO
should use the documented INSERT INTO statement instead.
Resolution: Fixed
> Disable upsert into syntax in Flink SQL
> ---------------------------------------
>
> Key: FLINK-22942
> URL: https://issues.apache.org/jira/browse/FLINK-22942
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Reporter: Leonard Xu
> Assignee: Francesco Guardiani
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.15.0
>
>
> I found we can write *insert into* and *upsert into* in Flink SQL， but the
> later syntax's semantic and behavior is never discussed, currently they have
> same implementation.
> We should disable the later one util we support `*upsert into* ` with
> correct behavior.
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