gatorsmile commented on issue #25107: [SPARK-28344][SQL] detect ambiguous self-join and fail the query URL: https://github.com/apache/spark/pull/25107#issuecomment-516625206 How about the nested column? ```Scala val df = spark.read .json(Seq("""{"a": {"b": 1, "a": {"a": 1}}, "c": [{"d": 1}]}""").toDS()) val df1 = df df1.join(df, df("a.b") > df1("a.b")) ```
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