From 485c61cadd3bf0c8c55043846838d5f36eba5a61 Mon Sep 17 00:00:00 2001
From: Zhongshuai Pei <799203320@qq.com>
Date: Wed, 29 Apr 2015 17:16:18 +0800
Subject: [PATCH] Update Optimizer.scala

---
 .../org/apache/spark/sql/catalyst/optimizer/Optimizer.scala    | 3 +++
 1 file changed, 3 insertions(+)

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 2d03fbfb0d311..07f0802529127 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
@@ -171,6 +171,9 @@ object ColumnPruning extends Rule[LogicalPlan] {
 
       Project(substitutedProjection, child)
 
+    case Project(projectList, Limit(exp, child)) =>
+      Limit(exp, Project(projectList, child))
+      
     // Eliminate no-op Projects
     case Project(projectList, child) if child.output == projectList => child
   }