GitHub user clockfly opened a pull request:
https://github.com/apache/spark/pull/13749
[SPARK-16034][SQL][WIP] Checks the partition columns when calling
dataFrame.write.mode("append").saveAsTable
## What changes were proposed in this pull request?
DataFrameWriter can be used to append data to existing DataSource tables.
It becomes tricky when partition columns used in
`DataFrameWriter.partitionBy(columns)` doesn't match the actual partition
columns of the underlying table. This pull request enforces the check so that
the partition columns always match.
## How was this patch tested?
Unit test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/clockfly/spark SPARK-16034
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13749.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 #13749
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commit 44a22dd6a44caf58f728bd490bcf43b70f271db3
Author: Sean Zhong <seanzh...@databricks.com>
Date: 2016-06-18T00:52:05Z
SPARK-16034
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