GitHub user clockfly opened a pull request:
https://github.com/apache/spark/pull/13433
[SPARK-15692][SQL]Improves the explain output of several physical plans by
displaying embedded logical plan in tree style
## What changes were proposed in this pull request?
Improves the explain output of several physical plans by displaying
embedded logical plan in tree style
Some physical plan contains a embedded logical plan, for example, `cache
tableName query` maps to:
```
case class CacheTableCommand(
tableName: String,
plan: Option[LogicalPlan],
isLazy: Boolean)
extends RunnableCommand
```
It is easier to read the explain output if we can display the `plan` in
tree style.
**Before change:**
Everything is messed in one line.
```
scala> Seq((1,2)).toDF().createOrReplaceTempView("testView")
scala> spark.sql("cache table testView2 select * from testView").explain()
== Physical Plan ==
ExecutedCommand CacheTableCommand testView2, Some('Project [*]
+- 'UnresolvedRelation `testView`, None
), false
```
**After change:**
```
scala> spark.sql("cache table testView2 select * from testView").explain()
== Physical Plan ==
ExecutedCommand
: +- CacheTableCommand testView2, false
: : +- 'Project [*]
: : +- 'UnresolvedRelation `testView`, None
```
## How was this patch tested?
Manual test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/clockfly/spark verbose_breakdown_3_2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13433.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #13433
----
commit 8a4423a1bda5258a2af47178c5e7fa90e6239a35
Author: Sean Zhong <seanzh...@databricks.com>
Date: 2016-06-01T02:53:58Z
some 1
commit f4454a8f52cb775767a7047a6d4282221829ef78
Author: Sean Zhong <seanzh...@databricks.com>
Date: 2016-06-01T05:07:50Z
some 1
commit 9693e52ad27c6cc68a133398383160365f93ad93
Author: Sean Zhong <seanzh...@databricks.com>
Date: 2016-06-01T05:23:11Z
some 1
----
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