GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/13730
[SPARK-16006][SQL] Attemping to write empty DataFrame with no fields throws
non-intuitive exception
## What changes were proposed in this pull request?
This PR fixes the error message on writing `emptyDataFrame` having no
fields.
**Before**
```scala
scala> spark.emptyDataFrame.write.text("p")
org.apache.spark.sql.AnalysisException: Cannot use all columns for
partition columns;
```
**After**
```scala
scala> spark.emptyDataFrame.write.text("p")
org.apache.spark.sql.AnalysisException: Cannot write dataset with no fields;
```
## How was this patch tested?
Pass the Jenkins tests including updated test cases.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-16006
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13730.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 #13730
----
commit da1017e10869b922f794f7503340f0d97871d5a8
Author: Dongjoon Hyun <[email protected]>
Date: 2016-06-17T05:22:38Z
[SPARK-16006][SQL] Attemping to write empty DataFrame with no fields throw
non-intuitive exception
----
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