Update comments

maropu · maropu · commit 973402bd822c · 2017-08-17T15:09:18.000+09:00
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/PruningSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/PruningSuite.scala
@@ -164,9 +164,8 @@ class PruningSuite extends HiveComparisonTest with BeforeAndAfter {
       assert(actualOutputColumns === expectedOutputColumns, "Output columns mismatch")
 
       // Scanned columns in `HiveTableScanExec` are generated by the `pruneFilterProject` method
-      // in `SparkPlanner` that internally uses `AttributeSet.toSeq`.
-      // Since we change an output order of `AttributeSet.toSeq` in SPARK-18394,
-      // we need to sort column names for a test below.
+      // in `SparkPlanner`. This method internally uses `AttributeSet.toSeq`, in which
+      // the returned output columns are sorted by the names and expression ids.
       assert(actualScannedColumns.sorted === expectedScannedColumns.sorted,
         "Scanned columns mismatch")
 
