GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/14812
[SPARK-17237][SQL] Remove unnecessary backticks in a pivot result schema
## What changes were proposed in this pull request?
A schema of pivot results has nested backticks (e.g. \`3_count(\`c\`)\`).
Since `Dataset#resolve` cannot handle the nested backticks, these column
references fail
after pivoting. This pr is to remove the unnecessary backticks.
## How was this patch tested?
Added a test in `DataFrameAggregateSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark SPARK-17237
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14812.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 #14812
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commit 530d5c03b414d9743944d532ecb9e9bd1c0bf5a5
Author: Takeshi YAMAMURO <[email protected]>
Date: 2016-08-25T19:17:50Z
Fix a bug to handle missing data after pivoting
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