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ASF GitHub Bot commented on DRILL-4270: --------------------------------------- Github user amansinha100 commented on the pull request: https://github.com/apache/drill/pull/322#issuecomment-172038682 Overall refactoring looks ok. One thing that needs some clarity: Is the definition of default frame 'between unbounded preceding and current row' ? If the user explicitly specifies this frame in the query, will it be treated as default or custom frame (as opposed to not specifying anything frame) ? > 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: Aman Sinha > Fix For: Future > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)