From 0ba5f42ff34ded072a0241409b1e366baa77e506 Mon Sep 17 00:00:00 2001
From: Zhongshuai Pei <799203320@qq.com>
Date: Wed, 10 Jun 2015 11:48:59 +0800
Subject: [PATCH] Update Optimizer.scala

---
 .../apache/spark/sql/catalyst/optimizer/Optimizer.scala    | 7 ++++---
 1 file changed, 4 insertions(+), 3 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 582031ee71464..c2818d957cc79 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
@@ -36,20 +36,21 @@ object DefaultOptimizer extends Optimizer {
     // SubQueries are only needed for analysis and can be removed before execution.
     Batch("Remove SubQueries", FixedPoint(100),
       EliminateSubQueries) ::
-    Batch("Operator Optimizations", FixedPoint(100),
+    Batch("Operator Reordering", FixedPoint(100),
       UnionPushdown,
       CombineFilters,
       PushPredicateThroughProject,
+      PushPredicateThroughJoin,
       PushPredicateThroughGenerate,
       ColumnPruning,
       ProjectCollapsing,
-      CombineLimits,
+      CombineLimits) ::
+    Batch("ConstantFolding", FixedPoint(100),
       NullPropagation,
       OptimizeIn,
       ConstantFolding,
       LikeSimplification,
       BooleanSimplification,
-      PushPredicateThroughJoin,
       SimplifyFilters,
       SimplifyCasts,
       SimplifyCaseConversionExpressions) ::