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  1. Flink
  2. FLINK-24054

Let SinkUpsertMaterializer emit +U instead of only +I

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      Currently, SinkUpsertMaterializer is not able to emit +U's but will always emit +I's. Thus, resulting changelogs are incorrect strictly speaking and only valid when treating +U and +I as similar changes in downstream operators.

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              twalthr Timo Walther
              twalthr Timo Walther
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