GitHub user zhengruifeng opened a pull request:
https://github.com/apache/spark/pull/19927
[WIP] OVR transform optimization
## What changes were proposed in this pull request?
optimize OVR transform
## How was this patch tested?
existing tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhengruifeng/spark ovr_transform
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19927.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 #19927
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commit b1c02277c9490f7866834d4fb8028098b62066b9
Author: Zheng RuiFeng <[email protected]>
Date: 2017-12-07T11:05:08Z
create pr
commit 45f70c87822b7c4bd872c0729509eeed0a2f9441
Author: Zheng RuiFeng <[email protected]>
Date: 2017-12-08T02:22:07Z
update pr
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