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https://issues.apache.org/jira/browse/FLINK-22799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17354194#comment-17354194
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Yun Tang commented on FLINK-22799:
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+1 for this.
> Missing documentation: No state backwards compatibility is not support for
> Flink SQL
> ------------------------------------------------------------------------------------
>
> Key: FLINK-22799
> URL: https://issues.apache.org/jira/browse/FLINK-22799
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 1.13.0, 1.14.0, 1.12.4
> Reporter: Matthias
> Priority: Major
> Labels: starter
> Fix For: 1.14.0, 1.12.5, 1.13.2
>
>
> Flink SQL does not support state backwards compatibility. This does not seem
> to be state somewhere in the documentation. We should add a section to the
> respective section of the docs (e.g. [Upgrade
> Applications|https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/ops/upgrading/]
> and the [Flink
> SQL|https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/dev/table/overview/]
> documentation.
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