GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/9792
[SPARK-11795][SQL] combine grouping attributes into a single NamedExpression
we use `ExpressionEncoder.tuple` to build the result encoder, which assumes
the input encoder should point to a struct type field if itâs non-flat.
However, our keyEncoder always point to a flat field/fields:
`groupingAttributes`, we should combine them into a single `NamedExpression`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark agg
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9792.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 #9792
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commit 58509f8d171d159b4ecf8d36722e24ea6c7a9c12
Author: Wenchen Fan <[email protected]>
Date: 2015-11-18T05:29:44Z
combine grouping attributes into a single NamedExpression
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