nchammas commented on issue #25107: [SPARK-28344][SQL] detect ambiguous self-join and fail the query URL: https://github.com/apache/spark/pull/25107#issuecomment-561448189 I wonder if this patch fixes the correctness issue reported (with repro) in [SPARK-25150](https://issues.apache.org/jira/browse/SPARK-25150). I'll give it a try later this week.
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