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https://issues.apache.org/jira/browse/CALCITE-1931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16120073#comment-16120073
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MinJi Kim commented on CALCITE-1931:
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I have updated the pull request with some additional changes for you to review. 
 Thanks!

https://github.com/apache/calcite/pull/511

> rank/ntile/etc. functions should not always return INTEGER
> ----------------------------------------------------------
>
>                 Key: CALCITE-1931
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1931
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: MinJi Kim
>            Assignee: Julian Hyde
>
> For example, rank() and percent_rank() both return INTEGER.  For rank(), it 
> would be better to return BIGINT; for percent_rank(), we should actually 
> return double or float since it is a percent value.  There are other rank 
> functions that should return floating number instead of integer.



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