From 9bd6930c928d082faab8ab463ffbe66024242d11 Mon Sep 17 00:00:00 2001
From: Yijie Shen <henry.yijieshen@gmail.com>
Date: Wed, 24 Jun 2015 20:54:40 +0800
Subject: [PATCH] revert accidental change

---
 .../org/apache/spark/sql/catalyst/expressions/math.scala    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/math.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/math.scala
index 70af971440908..c9e8b72cdb486 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/math.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/math.scala
@@ -404,7 +404,11 @@ case class Atan2(left: Expression, right: Expression)
 case class Pow(left: Expression, right: Expression)
   extends BinaryMathExpression(math.pow, "POWER") {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    defineCodeGen(ctx, ev, (c1, c2) => s"java.lang.Math.pow($c1, $c2)")
+    defineCodeGen(ctx, ev, (c1, c2) => s"java.lang.Math.pow($c1, $c2)") + s"""
+      if (Double.valueOf(${ev.primitive}).isNaN()) {
+        ${ev.isNull} = true;
+      }
+      """
   }
 }