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https://issues.apache.org/jira/browse/TAJO-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13967379#comment-13967379
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Hyunsik Choi commented on TAJO-756:
-----------------------------------
This issue will be completed and window function can be used only when all
subtasks are completed. So, while we are working on subtasks, the feature
becomes incomplete. For this reason, I'll make a branch for window function.
After all subtasks are completed, we'll merge the branch to master.
> (Umbrella) Window function support
> ----------------------------------
>
> Key: TAJO-756
> URL: https://issues.apache.org/jira/browse/TAJO-756
> Project: Tajo
> Issue Type: New Feature
> Components: distributed query plan, parser, physical operator,
> planner/optimizer
> Reporter: Hyunsik Choi
> Fix For: 1.0-incubating
>
>
> A window function performs a calculation across a set of table rows
> associated with some window frame. Window function is the key feature for
> analytic applications. We need to support window function.
> Window function support involves various issues, new grammar rules, logical
> planning, distributed planning, and physical planning. This is an umbrella
> issue. I'll create various subtasks.
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