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From "Raviteja Lokineni (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-17893) Window functions should also allow looking back in time
Date Wed, 12 Oct 2016 20:15:20 GMT
Raviteja Lokineni created SPARK-17893:
-----------------------------------------

             Summary: Window functions should also allow looking back in time
                 Key: SPARK-17893
                 URL: https://issues.apache.org/jira/browse/SPARK-17893
             Project: Spark
          Issue Type: New Feature
          Components: Spark Core
    Affects Versions: 2.0.1
            Reporter: Raviteja Lokineni


This function should allow looking back. The current window(timestamp, duration) seems to
be for looking forward in time.

Example:
{code}dataFrame.groupBy(window("date", "7 days ago")).agg(min("col1"), max("col1")){code}

For example, if date: 2013-01-07 then the window should be 2013-01-01 - 2013-01-07



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