GitHub user koertkuipers opened a pull request:
https://github.com/apache/spark/pull/13532
[SPARK-15204][SQL] improve nullability inference for Aggregator
## What changes were proposed in this pull request?
TypedAggregateExpression sets nullable based on the schema of the
outputEncoder
## How was this patch tested?
Add test in DatasetAggregatorSuite
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tresata/spark feat-aggregator-nullable
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13532.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 #13532
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commit 32cfcb7dcf0e42331a9ef29a2f0c611538cc4063
Author: Koert Kuipers <ko...@tresata.com>
Date: 2016-06-06T20:34:39Z
improve nullability inference for Aggregator
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