GitHub user aray opened a pull request:
https://github.com/apache/spark/pull/7841
[SPARK-8992] [SQL] Add pivot to dataframe api
This adds a pivot method to the dataframe api.
Following the lead of cube and rollup this adds a Pivot operator that is
translated into an Aggregate by the analyzer.
Currently the syntax is like:
courseSales.pivot(Seq($"year"), $"course", Seq("dotNET", "Java"),
sum($"earnings"))
Would we be interested in the following syntax also/alternatively?
courseSales.groupBy($"year").pivot($"course", "dotNET",
"Java").agg(sum($"earnings"))
Later we can add it to `SQLParser`, but as Hive doesn't support it we cant
add it there, right?
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aray/spark sql-pivot
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/7841.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 #7841
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commit 599e9e0b9bd46be798da1274e9ba9839151b2aaf
Author: Andrew Ray <[email protected]>
Date: 2015-07-29T21:05:21Z
Add pivot to dataframe api
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