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https://issues.apache.org/jira/browse/KAFKA-4304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15833900#comment-15833900
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Matthias J. Sax commented on KAFKA-4304:
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[~jeyhunkarimov] I am not sure what you mean by {{top-k}} queries in this
context? Currently, Interactive Queries only allow to to single key lookup and
range queries.
> Extend Interactive Queries for return latest update timestamp per key
> ---------------------------------------------------------------------
>
> Key: KAFKA-4304
> URL: https://issues.apache.org/jira/browse/KAFKA-4304
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Matthias J. Sax
> Priority: Minor
> Labels: newbie++
>
> Currently, when querying state store, it is not clear when the key was
> updated last. The ides of this JIRA is to make the latest update timestamp
> for each key-value-pair of the state store accessible.
> For example, this might be useful to
> * check if a value was update but did not changed (just compare the update
> TS)
> * if you want to consider only recently updated keys
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