GitHub user hvanhovell opened a pull request:
https://github.com/apache/spark/pull/10957
[SPARK-13049] Add First/last with ignore nulls to functions.scala
This PR adds the ability to specify the ```ignoreNulls``` option to the
functions dsl, e.g:
```df.select($"id", last($"value", ignoreNulls =
true).over(Window.partitionBy($"id").orderBy($"other"))```
This PR is some where between a bug fix (see the JIRA) and a new feature. I
am not sure if we should backport to 1.6.
cc @yhuai
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hvanhovell/spark SPARK-13049
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10957.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 #10957
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commit defcc02a8885e884d5140b11705b764a51753162
Author: Herman van Hovell <[email protected]>
Date: 2016-01-27T21:31:30Z
First/last with ignore nulls.
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