From 41e2e5acb749c25641f1f8dea5a2e1d8af319486 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 25 Feb 2015 15:37:13 -0800
Subject: [PATCH] [SPARK-5926] [SQL] make DataFrame.explain leverage
queryExecution.logical
DataFrame.explain return wrong result when the query is DDL command.
For example, the following two queries should print out the same execution plan, but it not.
sql("create table tb as select * from src where key > 490").explain(true)
sql("explain extended create table tb as select * from src where key > 490")
This is because DataFrame.explain leverage logicalPlan which had been forced executed, we should use the unexecuted plan queryExecution.logical.
Author: Yanbo Liang <ybliang8@gmail.com>
Closes #4707 from yanboliang/spark-5926 and squashes the following commits:
fa6db63 [Yanbo Liang] logicalPlan is not lazy
0e40a1b [Yanbo Liang] make DataFrame.explain leverage queryExecution.logical
---
sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 04bf5d9b0f..f045da305c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -264,7 +264,7 @@ class DataFrame protected[sql](
*/
def explain(extended: Boolean): Unit = {
ExplainCommand(
- logicalPlan,
+ queryExecution.logical,
extended = extended).queryExecution.executedPlan.executeCollect().map {
r => println(r.getString(0))
}
--
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