GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/18598
[SPARK-19285] [SQL] Implement UDF0
### What changes were proposed in this pull request?
This PR is to implement UDF0. `UDF0` is needed when users need to implement
a JAVA UDF with no argument.
### How was this patch tested?
Added a test case
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark udf0
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18598.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 #18598
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commit b7c600015178823bec13958f5afe1c7971c17158
Author: gatorsmile <[email protected]>
Date: 2017-07-11T04:54:15Z
fix.
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