[GitHub] spark pull request #20030: [SPARK-10496][CORE] Efficient RDD cumulative sum

[zhengruifeng]

Github user zhengruifeng closed the pull request at:

https://github.com/apache/spark/pull/20030


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[GitHub] spark pull request #20030: [SPARK-10496][CORE] Efficient RDD cumulative sum

[zhengruifeng]

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


commit f32240cf07923f86fd1717dcdece6f94001a662a
Author: Zheng RuiFeng 
Date:   2017-12-20T09:37:03Z

create pr

commit 4f1d5e269c5f84f6126fea97c201b6cd6fef461f
Author: Zheng RuiFeng 
Date:   2017-12-20T09:48:51Z

update tests




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