GitHub user aokolnychyi opened a pull request:
https://github.com/apache/spark/pull/21473
[SPARK-21896][SQL] Fix StackOverflow caused by window functions inside
aggregate functions
## What changes were proposed in this pull request?
This PR explicitly prohibits window functions inside aggregates. Currently,
this will cause StackOverflow during analysis. See PR #19193 for previous
discussion.
## How was this patch tested?
This PR comes with a dedicated unit test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aokolnychyi/spark
fix-stackoverflow-window-funcs
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21473.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 #21473
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commit 646a96d75c12b2e3c6886bc0cc9743e7ba838c8a
Author: aokolnychyi <anton.okolnychyi@...>
Date: 2018-05-31T10:58:29Z
[SPARK-21896][SQL] Fix StackOverflow caused by window functions inside
aggregate functions
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