GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/17915
[SPARK-20674][SQL] Support registering UserDefinedFunction as named UDF
## What changes were proposed in this pull request?
For some reason we don't have an API to register UserDefinedFunction as
named UDF. It is a no brainer to add one, in addition to the existing register
functions we have.
## How was this patch tested?
Added a test case in UDFSuite for the new API.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark SPARK-20674
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17915.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 #17915
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