GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/22044
[SPARK-23912][SQL][Followup] Refactor ArrayDistinct
## What changes were proposed in this pull request?
This PR simplified code generation for `ArrayDistinct`. #21966 enabled code
generation only if the type can be specialized by the hash set. This PR follows
this strategy.
Optimization of null handling will be implemented in #21912.
## How was this patch tested?
Existing UTs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-23912-follow
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22044.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 #22044
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commit 9d0cb100a85dc77569e1a62b83e0461ee2c33ddb
Author: Kazuaki Ishizaki <ishizaki@...>
Date: 2018-08-08T18:43:51Z
stop code generation when elementTypeSupportEquals is false
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