Konstantin Knauf created FLINK-19149:
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             Summary: Compacted Kafka Topic can be interpreted as Changelog 
Stream
                 Key: FLINK-19149
                 URL: https://issues.apache.org/jira/browse/FLINK-19149
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / Kafka
            Reporter: Konstantin Knauf


I would like to be able to interpret a compacted Kafka Topic as a upsert stream 
in Apache Flink. Similarly, I would like to be able to write an upsert stream 
to Kafka (into a compacted topic). 

In both cases, the (possibly implicit) primary key of the Flink SQL Table would 
need to correspond to the fields that make up the keys of the Kafka records.





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