From 2d07ade0b97833ec6f7118a4d140733a533bc34c Mon Sep 17 00:00:00 2001
From: Juliusz Sompolski <julek@databricks.com>
Date: Fri, 5 May 2017 19:35:48 +0200
Subject: [PATCH] [SPARK-20616] RuleExecutor logDebug of batch results should
 show diff to start of batch

Due to a likely typo, the logDebug msg printing the diff of query plans shows a diff to the initial plan, not diff to the start of batch.
---
 .../org/apache/spark/sql/catalyst/rules/RuleExecutor.scala      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/rules/RuleExecutor.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/rules/RuleExecutor.scala
index 6fc828f63f152..85b368c862630 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/rules/RuleExecutor.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/rules/RuleExecutor.scala
@@ -122,7 +122,7 @@ abstract class RuleExecutor[TreeType <: TreeNode[_]] extends Logging {
         logDebug(
           s"""
           |=== Result of Batch ${batch.name} ===
-          |${sideBySide(plan.treeString, curPlan.treeString).mkString("\n")}
+          |${sideBySide(batchStartPlan.treeString, curPlan.treeString).mkString("\n")}
         """.stripMargin)
       } else {
         logTrace(s"Batch ${batch.name} has no effect.")