sandip-db commented on code in PR #50052:
URL: https://github.com/apache/spark/pull/50052#discussion_r1986121542


##########
sql/core/src/test/scala/org/apache/spark/sql/CsvFunctionsSuite.scala:
##########
@@ -760,12 +760,9 @@ class CsvFunctionsSuite extends QueryTest with 
SharedSparkSession {
       context = ExpectedContext(fragment = "to_csv", 
getCurrentClassCallSitePattern)
     )
 
-    checkError(
-      exception = intercept[SparkUnsupportedOperationException] {
-        df.select(from_csv(lit("data"), valueSchema, Map.empty[String, 
String])).collect()
-      },
-      condition = "UNSUPPORTED_DATATYPE",
-      parameters = Map("typeName" -> "\"VARIANT\"")
+    checkAnswer(
+      df.select(from_csv(lit("1,2,3"), valueSchema, Map.empty[String, 
String])),
+      Seq(Row(Row(1L, "2", new VariantVal(Array[Byte](12, 3), Array[Byte](1, 
0, 0)))))
     )

Review Comment:
   Move this to a new test and also add `singleVariantColumn` scenario for 
`from_csv`.



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