jinchengchenghh commented on code in PR #11195:
URL: 
https://github.com/apache/incubator-gluten/pull/11195#discussion_r2573251250


##########
gluten-ut/spark40/src/test/scala/org/apache/spark/sql/GlutenDataFrameFunctionsSuite.scala:
##########
@@ -49,4 +52,230 @@ class GlutenDataFrameFunctionsSuite extends 
DataFrameFunctionsSuite with GlutenS
       false
     )
   }
+
+  testGluten("map_concat function") {
+    val df1 = Seq(
+      (Map[Int, Int](1 -> 100, 2 -> 200), Map[Int, Int](3 -> 300, 4 -> 400)),
+      (Map[Int, Int](1 -> 100, 2 -> 200), Map[Int, Int](3 -> 300, 1 -> 400)),
+      (null, Map[Int, Int](3 -> 300, 4 -> 400))
+    ).toDF("map1", "map2")
+
+    val expected1a = Seq(
+      Row(Map(1 -> 100, 2 -> 200, 3 -> 300, 4 -> 400)),
+      Row(Map(1 -> 400, 2 -> 200, 3 -> 300)),
+      Row(null)
+    )
+
+    intercept[SparkException](df1.selectExpr("map_concat(map1, 
map2)").collect())

Review Comment:
   Can GlutenException inherit SparkRuntimeException? Now it inherits 
RuntimeException, I'm not sure if it is more feasible.



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