GitHub user vectorijk opened a pull request:
https://github.com/apache/beam/pull/3568
[BEAM-2612] variance builtin aggregation functions
implement var_pop, var_samp builtin aggregation functions
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vectorijk/beam beam-2612-variance
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/beam/pull/3568.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 #3568
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commit ff9cb47f6ac03cdbf2aed233f0c6045b719bf643
Author: Kai Jiang <[email protected]>
Date: 2017-07-16T10:25:32Z
var_pop, var_samp builtin aggreagtion functions
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