GitHub user mn-mikke opened a pull request:
https://github.com/apache/spark/pull/22017
[SPARK-23938][SQL] Add map_zip_with function
## What changes were proposed in this pull request?
This PR adds a new SQL function called ```map_zip_with```. It merges the
two given maps into a single map by applying function to the pair of values
with the same key.
## How was this patch tested?
Added new tests into:
- DataFrameFunctionsSuite.scala
- HigherOrderFunctionsSuite.scala
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mn-mikke/spark SPARK-23938
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22017.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 #22017
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commit ef56011f03d8bae4634e5d3108e4d6502482383c
Author: Marek Novotny <mn.mikke@...>
Date: 2018-08-06T23:42:45Z
[SPARK-23938][SQL] Add map_zip_with function
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