HeartSaVioR edited a comment on issue #26108: [SPARK-26154][SS] Streaming left/right outer join should not return outer nulls for already matched rows URL: https://github.com/apache/spark/pull/26108#issuecomment-577433981 So unlike other states having versions which can be co-existed, for stream-stream outer join, there's only "valid" and "invalid" state format which cannot be co-existed. Why we still keep state format 1 is that stream-stream inner join is not affected by this bug and we don't want to let the case also discard the state. It will affect too many existing queries and I'd like to reduce the impact.
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