GitHub user wzhfy opened a pull request:
https://github.com/apache/spark/pull/15877
[SPARK-18429] [SQL] implement a new Aggregate for CountMinSketch
## What changes were proposed in this pull request?
This PR implements a new Aggregate to generate count min sketch, which is a
wrapper of CountMinSketch.
## How was this patch tested?
add test cases
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wzhfy/spark cms
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15877.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 #15877
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commit a4753e4fa2c8272576fbd44c4b4670947b332289
Author: wangzhenhua <wangzhen...@huawei.com>
Date: 2016-11-14T05:59:48Z
Agg for CountMinSketch
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