Matthias J. Sax created KAFKA-4304:

             Summary: Extend Interactive Queries for return latest update 
timestamp per key
                 Key: KAFKA-4304
             Project: Kafka
          Issue Type: Improvement
          Components: streams
            Reporter: Matthias J. Sax
            Assignee: Guozhang Wang
            Priority: Minor

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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