Ngone51 commented on pull request #29106:
URL: https://github.com/apache/spark/pull/29106#issuecomment-659240765
test("SPARK-32307: Aggression that use array type input UDF as group
expression") {
spark.udf.register("key", udf((m: Array[Int]) => m.head))
Seq(Array(1)).toDF("a").createOrReplaceTempView("t")
checkAnswer(sql("SELECT key(a) AS k FROM t GROUP BY key(a)"), Row(1) ::
Nil)
}
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