GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/21103
[SPARK-23915][SQL] Add array_except function
## What changes were proposed in this pull request?
The PR adds the SQL function `array_except`. The behavior of the function
is based on Presto's one.
This function returns returns an array of the elements in array1 but not in
array2.
Note: The order of elements in the result is not defined.
## How was this patch tested?
Added UTs.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-23915
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21103.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 #21103
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commit ce18ce0cd4da3378bb9f83237b7f9165737e7760
Author: Kazuaki Ishizaki <ishizaki@...>
Date: 2018-04-18T18:03:55Z
initial commit
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