GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/10968
[SPARK-12818][SQL] Specialized integral and string types for Count-min
Sketch
This PR is a follow-up of #10911. It adds specialized update methods for
`CountMinSketch` so that we can avoid doing internal/external row format
conversion in `DataFrame.countMinSketch()`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark cms-specialized
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10968.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 #10968
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commit 4ad74c0873a77c689cd1ba4e5ee3273a9fc8eae5
Author: Cheng Lian <[email protected]>
Date: 2016-01-28T01:41:53Z
Specialized integral and string types for Count-min Sketch
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