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https://issues.apache.org/jira/browse/FLINK-11055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chesnay Schepler updated FLINK-11055:
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Fix Version/s: (was: 1.7.0)
1.7.2
> Allow Queryable State to be transformed on the TaskManager before being
> returned to the client
> ----------------------------------------------------------------------------------------------
>
> Key: FLINK-11055
> URL: https://issues.apache.org/jira/browse/FLINK-11055
> Project: Flink
> Issue Type: New Feature
> Components: Queryable State
> Reporter: Galen Warren
> Priority: Major
> Fix For: 1.7.2
>
>
> The proposal here is to enhance the way Queryable State works to allow for
> the state object to be transformed on the TaskManager before being returned
> to the client. As an example, if some MapState<K,V> were made queryable, such
> a transform might look up a specific key in the map and return its
> corresponding value, resulting in only that value being returned to the
> client instead of the entire map. This could be useful in cases where the
> client only wants a portion of the state and the state is large (this is my
> use case).
> At a high level, I think this could be accomplished by adding an (optional)
> serializable Function<TState,TTransformed> into KvStateRequest (and related
> classes?) and having that transform be applied in the QueryableStateServer
> (or QueryableStateClientProxy?). I expect some additional TypeInformation
> would also have to be supplied/used in places. It should be doable in a
> backwards compatible way such that if the client does not specify a transform
> it works exactly as it does now.
> Would there be any interested in a PR for this? This would help me for
> something I'm currently working on and I'd be willing to take a crack at it.
> If there is interest, I'll be happy to do some more research to come up with
> a more concrete proposal.
> Thanks for Flink - it's great!
>
>
>
>
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