GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/18245
[SPARK-20954][SQL][BRANCH-2.2] `DESCRIBE [EXTENDED]` result should be
compatible with previous Spark
## What changes were proposed in this pull request?
After [SPARK-20067](https://issues.apache.org/jira/browse/SPARK-20067),
`DESCRIBE` and `DESCRIBE EXTENDED` shows the following result. This is
incompatible with Spark 2.1.1. This PR removes the column header line in case
of those commands.
**MASTER** and **BRANCH-2.2**
```scala
scala> sql("desc t").show(false)
+----------+---------+-------+
|col_name |data_type|comment|
+----------+---------+-------+
|# col_name|data_type|comment|
|a |int |null |
+----------+---------+-------+
```
**SPARK 2.1.1** and **this PR**
```scala
scala> sql("desc t").show(false)
+--------+---------+-------+
|col_name|data_type|comment|
+--------+---------+-------+
|a |int |null |
+--------+---------+-------+
```
## How was this patch tested?
Pass the Jenkins with the updated test suites.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-20954-BRANCH-2.2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18245.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 #18245
----
commit a7ba2387f1d33c874a1c195e8adc4d7ff7183a21
Author: Dongjoon Hyun <[email protected]>
Date: 2017-06-08T23:46:56Z
[SPARK-20954][SQL][BRANCH-2.2] `DESCRIBE [EXTENDED]` result should be
compatible with previous Spark
After [SPARK-20067](https://issues.apache.org/jira/browse/SPARK-20067),
`DESCRIBE` and `DESCRIBE EXTENDED` shows the following result. This is
incompatible with Spark 2.1.1. This PR removes the column header line in case
of those command.
**MASTER** and **BRANCH-2.2**
```scala
scala> sql("desc t").show(false)
+----------+---------+-------+
|col_name |data_type|comment|
+----------+---------+-------+
|# col_name|data_type|comment|
|a |int |null |
+----------+---------+-------+
```
**SPARK 2.1.1** and **this PR**
```scala
scala> sql("desc t").show(false)
+--------+---------+-------+
|col_name|data_type|comment|
+--------+---------+-------+
|a |int |null |
+--------+---------+-------+
```
Pass the Jenkins with the updated test suites.
----
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