[jira] [Created] (DRILL-4270) Create a separate WindowFramer that supports the FRAME clause

["Deneche A. Hakim (JIRA)" <ji...@apache.org>]

Deneche A. Hakim created DRILL-4270:
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             Summary: Create a separate WindowFramer that supports the FRAME clause
                 Key: DRILL-4270
                 URL: https://issues.apache.org/jira/browse/DRILL-4270
             Project: Apache Drill
          Issue Type: Sub-task
          Components: Execution - Relational Operators
    Affects Versions: 1.5.0
            Reporter: Deneche A. Hakim
            Assignee: Deneche A. Hakim


Currently most the window functions logic is handled by DefaultFrameTemplate. Create a separate CustomFrameTemplate that handles the FRAME clause, this should make the code in both classes more focused and will make it easier for us to add support for the FRAME clause.

Aggregations, FIRST_VALUE and LAST_VALUE will be handled by CustomFrameTemplate, and all remaining window functions (Ranking, ROW_NUMBER, LEAD and LAG) will be handled by DefaultFrameTemplate.



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