GitHub user BryanCutler opened a pull request:
https://github.com/apache/spark/pull/21471
[SPARK-24444][DOCS][PYTHON] Improve Pandas UDF docs to explain column
assignment
## What changes were proposed in this pull request?
Added sections to pandas_udf docs, in the grouped map section, to indicate
columns are assigned by position.
## How was this patch tested?
NA
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/BryanCutler/spark
arrow-doc-pandas_udf-column_by_pos-SPARK-21427
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21471.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 #21471
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commit 5550079b6b04c9659db8ec6e4b0f90db023f4767
Author: Bryan Cutler <cutlerb@...>
Date: 2018-05-31T18:50:07Z
added note to doc test
commit a41314fbefa1d04f127efae608e9c1afd1f5413e
Author: Bryan Cutler <cutlerb@...>
Date: 2018-05-31T19:10:09Z
added to sql guide
commit c7f1a3f36550b7ec1a2e829178d3ca019a5a1f2b
Author: Bryan Cutler <cutlerb@...>
Date: 2018-05-31T19:12:32Z
slight reword
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