Addresses comments

Author: liancheng

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala

@@ -89,9 +89,8 @@ class CheckAnalysis {
         }
 
         operator match {
-          case o if o.children.nonEmpty &&
-            !o.references.filter(_.name != "grouping__id").subsetOf(o.inputSet) =>
-            val missingAttributes = (o.references -- o.inputSet).mkString(",")
+          case o if o.children.nonEmpty && o.missingInput.nonEmpty =>
+            val missingAttributes = o.missingInput.mkString(",")
             val input = o.inputSet.mkString(",")
 
             failAnalysis(

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala

@@ -47,9 +47,12 @@ abstract class QueryPlan[PlanType <: TreeNode[PlanType]] extends TreeNode[PlanTy
    * Attributes that are referenced by expressions but not provided by this nodes children.
    * Subclasses should override this method if they produce attributes internally as it is used by
    * assertions designed to prevent the construction of invalid plans.
+   *
+   * Note that virtual columns should be excluded. Currently, we only support the grouping ID
+   * virtual column.
    */
-  def missingInput: AttributeSet = (references -- inputSet)
-    .filter(_.name != VirtualColumn.groupingIdName)
+  def missingInput: AttributeSet =
+    (references -- inputSet).filter(_.name != VirtualColumn.groupingIdName)
 
   /**
    * Runs [[transform]] with `rule` on all expressions present in this query operator.

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala

@@ -200,7 +200,8 @@ class AnalysisSuite extends FunSuite with BeforeAndAfter {
     assert(pl(4).dataType == DoubleType)
   }
 
-  test("SPARK-6452: CheckAnalysis should throw when Aggregate contains missing attributes") {
+  test("SPARK-6452 regression test") {
+    // CheckAnalysis should throw AnalysisException when Aggregate contains missing attribute(s)
     val plan =
       Aggregate(
         Nil,