dongjoon-hyun commented on a change in pull request #32167:
URL: https://github.com/apache/spark/pull/32167#discussion_r618083727
##########
File path: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
##########
@@ -404,6 +404,9 @@ class SQLQuerySuite extends QueryTest with
SharedSparkSession with AdaptiveSpark
checkAnswer(
sql("SELECT COALESCE(null, null, null)"),
Row(null))
+ checkAnswer(
+ sql("SELECT COALESCE(s, n) FROM nullStrings"),
Review comment:
WDYT about the above @HyukjinKwon 's comment, @zengruios ? Is this PR
different because this is `String`? If this is already covered, shall we close
this PR?
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