GitHub user marmbrus opened a pull request:
https://github.com/apache/spark/pull/1935
[WIP][SPARK-2554][SQL] CountDistinct and SumDistinct should do partial
aggregation
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/marmbrus/spark countDistinctPartial
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/1935.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 #1935
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commit 25388faa0a7a78af373d66dc253adf23d56a2eac
Author: Michael Armbrust <[email protected]>
Date: 2014-08-14T02:44:10Z
Draft of partially aggregated count distinct
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