Github user KevinZwx commented on the issue: https://github.com/apache/spark/pull/16970 I'm a little confused with the behavior of dropDuplicates with watermark. According to my understanding of the guide documentation, if I have the following code, I expect to deduplicate still with uuid but use timestamp column and watermark to expire state. `.withWatermark("timestamp", "1 day") .dropDuplicates("uuid", "timestamp")` But in fact I found that the program probably uses uuid and timestamp as a combined key to deduplicate elements because the result count is much larger than using dropDuplicates("uuid") and more close to the result with no duplication. Is it the expected behaviorï¼If so how to achieve what I want?
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