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https://issues.apache.org/jira/browse/FLINK-25217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-25217:
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Labels: pull-request-available stale-major (was: pull-request-available)
I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help
the community manage its development. I see this issues has been marked as
Major but is unassigned and neither itself nor its Sub-Tasks have been updated
for 60 days. I have gone ahead and added a "stale-major" to the issue". If this
ticket is a Major, please either assign yourself or give an update. Afterwards,
please remove the label or in 7 days the issue will be deprioritized.
> FLIP-190: Support Version Upgrades for Table API & SQL Programs
> ---------------------------------------------------------------
>
> Key: FLINK-25217
> URL: https://issues.apache.org/jira/browse/FLINK-25217
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API, Table SQL / Planner
> Reporter: Timo Walther
> Priority: Major
> Labels: pull-request-available, stale-major
>
> Nowadays, the Table & SQL API is as important to Flink as the DataStream API.
> It is one of the main abstractions for expressing pipelines that perform
> stateful stream processing. Users expect the same backwards compatibility
> guarantees when upgrading to a newer Flink version as with the DataStream API.
> In particular, this means:
> * once the operator topology is defined, it remains static and does not
> change between Flink versions, unless resulting in better performance,
> * business logic (defined using expressions and functions in queries) behaves
> identical as before the version upgrade,
> * the state of a Table & SQL API program can be restored from a savepoint of
> a previous version,
> * adding or removing stateful operators should be made possible in the
> DataStream API.
> The same query can remain up and running after upgrades.
> https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=191336489
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