amaliujia commented on code in PR #38917:
URL: https://github.com/apache/spark/pull/38917#discussion_r1040422665
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sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala:
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@@ -1134,6 +1134,11 @@ class DataFrameSuite extends QueryTest
checkAnswer(approxSummaryDF, approxSummaryResult)
}
+ test("SPARK-41391: Correct the output column name of
groupBy.agg(count_distinct)") {
+ val df = person.groupBy("id").agg(count_distinct(col("name")))
+ assert(df.columns === Array("id", "count(DISTINCT name)"))
Review Comment:
nit: does it make sense to compare with columns from the SQL example?
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