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Posted to issues@spark.apache.org by "Narine Kokhlikyan (JIRA)" <ji...@apache.org> on 2016/08/21 21:27:21 UTC

[jira] [Created] (SPARK-17177) Make grouping columns accessible from RelationalGroupedDataset

Narine Kokhlikyan created SPARK-17177:
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             Summary: Make grouping columns accessible from RelationalGroupedDataset
                 Key: SPARK-17177
                 URL: https://issues.apache.org/jira/browse/SPARK-17177
             Project: Spark
          Issue Type: New Feature
            Reporter: Narine Kokhlikyan
            Priority: Minor


Currently, once we create `RelationalGroupedDataset`, we cannot access the grouping columns from its instance.
Analog to `Dataset` we can have a public method which returns the list of grouping columns. 
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala#L457

This can be useful for instance in SparkR when we want to have certain logic associated with the grouping columns, accessible from `RelationalGroupedDataset`.




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