[GitHub] [incubator-druid] michael-trelinski opened a new pull request #7367: Lookback query

[GitBox <gi...@apache.org>]

michael-trelinski opened a new pull request #7367: Lookback query
URL: https://github.com/apache/incubator-druid/pull/7367
 
 
   Please review these changes.  The lookback query is an exciting new feature that we've been using for a while at my company.
   
   It supports a cohort from a query or dataSource useful for trend analysis between Periods.
   
   Example:
   
   Data:
   [ (T-1, 1), (T-2, 2), (T-3, 3) ]
   
   Possible cohort:
   T-1 join T-2 = 1,2
   T-2 join T-3 = 2,3
   T-3 join _ = 3,null
   
   Example query and results are in the attached documentation.

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