GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/12137
[SPARK-14350][SQL] EXPLAIN output should be in a single cell
## What changes were proposed in this pull request?
EXPLAIN output should be in a single cell.
**Before**
```
scala> sql("explain select 1").collect()
res0: Array[org.apache.spark.sql.Row] = Array([== Physical Plan ==],
[WholeStageCodegen], [: +- Project [1 AS 1#1]], [: +- INPUT], [+- Scan
OneRowRelation[]])
```
**After**
```
scala> sql("explain select 1").collect()
res1: Array[org.apache.spark.sql.Row] =
Array([== Physical Plan ==
WholeStageCodegen
: +- Project [1 AS 1#4]
: +- INPUT
+- Scan OneRowRelation[]])
```
Or,
```
scala> sql("explain select 1").head
res1: org.apache.spark.sql.Row =
[== Physical Plan ==
WholeStageCodegen
: +- Project [1 AS 1#5]
: +- INPUT
+- Scan OneRowRelation[]]
```
Please note that `Spark-shell(Scala-shell)` trims long string output. So,
you may need to use `println` to get full strings.
```
scala> println(sql("explain codegen select 'a' as a group by 1").head)
[Found 2 WholeStageCodegen subtrees.
== Subtree 1 / 2 ==
WholeStageCodegen
...
/* 059 */ }
/* 060 */ }
]
```
## How was this patch tested?
Pass the Jenkins tests. (Testcases are updated.)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-14350
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12137.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 #12137
----
commit a1a9177b1d4e9f29117fb67edf9df27ccc04b139
Author: Dongjoon Hyun <dongj...@apache.org>
Date: 2016-04-03T08:45:45Z
[SPARK-14350][SQL] EXPLAIN output should be in a single cell
----
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