Joseph K. Bradley created SPARK-10496:
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Summary: Efficient DataFrame cumulative sum
Key: SPARK-10496
URL: https://issues.apache.org/jira/browse/SPARK-10496
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Joseph K. Bradley
Priority: Minor
Goal: Given a DataFrame with a numeric column X, create a new column Y which is
the cumulative sum of X.
This can be done with window functions, but it is not efficient for a large
number of rows. It could be done more efficiently using a prefix sum/scan.
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