GitHub user zhengruifeng opened a pull request:
https://github.com/apache/spark/pull/20030
[SPARK-10496][CORE] Efficient RDD cumulative sum
## What changes were proposed in this pull request?
impl Efficient RDD cumulative sum
## How was this patch tested?
existing tests and added tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhengruifeng/spark cum_scan
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20030.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 #20030
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commit f32240cf07923f86fd1717dcdece6f94001a662a
Author: Zheng RuiFeng <ruifengz@...>
Date: 2017-12-20T09:37:03Z
create pr
commit 4f1d5e269c5f84f6126fea97c201b6cd6fef461f
Author: Zheng RuiFeng <ruifengz@...>
Date: 2017-12-20T09:48:51Z
update tests
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