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https://issues.apache.org/jira/browse/HIVE-4964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732957#comment-13732957
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Edward Capriolo commented on HIVE-4964:
---------------------------------------

I think we are getting ahead of ourselves here. HIVE-4963 could be classified 
as a feature, but there are still big cleanups in the PTF work. There is lots 
of dead code, and lots of redundant code, we should clean all those items up 
first. There is  bits in there with xml encoded and other things that need to 
be moved. 
                
> Cleanup PTF code: remove code dealing with non standard sql behavior we had 
> original introduced
> -----------------------------------------------------------------------------------------------
>
>                 Key: HIVE-4964
>                 URL: https://issues.apache.org/jira/browse/HIVE-4964
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Harish Butani
>            Priority: Minor
>         Attachments: HIVE-4964.D11985.1.patch, HIVE-4964.D11985.2.patch
>
>
> There are still pieces of code that deal with:
> - supporting select expressions with Windowing
> - supporting a filter with windowing
> Need to do this before introducing  Perf. improvements. 

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