From 68b9fad66b499e667c827a1a0bb1ef8dccaa813e Mon Sep 17 00:00:00 2001
From: Cheng Hao <hao.cheng@intel.com>
Date: Mon, 5 May 2014 09:14:01 +0800
Subject: [PATCH] Remove the Literal pattern matching for NullPropagation

---
 .../org/apache/spark/sql/catalyst/optimizer/Optimizer.scala     | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 573fe047eb589..4d2729568ae7c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -94,8 +94,6 @@ object ColumnPruning extends Rule[LogicalPlan] {
 object NullPropagation extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
     case q: LogicalPlan => q transformExpressionsUp {
-      // Skip redundant folding of literals.
-      case l: Literal => l
       case e @ Count(Literal(null, _)) => Literal(0, e.dataType)
       case e @ Sum(Literal(c, _)) if(c == 0) => Literal(0, e.dataType)
       case e @ Average(Literal(c, _)) if(c == 0) => Literal(0.0, e.dataType)