Add more test cases

Author: dongjoon-hyun

sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala

@@ -3706,6 +3706,18 @@ class SQLQuerySuite extends QueryTest with SharedSparkSession with AdaptiveSpark
       }
     }
   }
+
+  test("SPARK-33338: GROUP BY using literal map should not fail") {
+    withTempDir { dir =>
+      sql(s"CREATE TABLE t USING ORC LOCATION '${dir.toURI}' AS SELECT map('k1', 'v1') m, 'k1' k")
+      Seq(
+        "SELECT map('k1', 'v1')[k] FROM t GROUP BY 1",
+        "SELECT map('k1', 'v1')[k] FROM t GROUP BY map('k1', 'v1')[k]",
+        "SELECT map('k1', 'v1')[k] a FROM t GROUP BY a").foreach { statement =>
+        checkAnswer(sql(statement), Row("v1"))
+      }
+    }
+  }
 }
 
 case class Foo(bar: Option[String])