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https://issues.apache.org/jira/browse/HIVE-23527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17125715#comment-17125715
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Zoltan Haindrich commented on HIVE-23527:
-----------------------------------------
HIVE-23462 contains a more conservative version of this patch - which also
fixes the "returning double part"
> CUME_DIST should be threated as a function returning double
> -----------------------------------------------------------
>
> Key: HIVE-23527
> URL: https://issues.apache.org/jira/browse/HIVE-23527
> Project: Hive
> Issue Type: Bug
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-23527.01.patch, HIVE-23527.01.patch
>
>
> right now it is handled as integer in calcite - which might cause some
> trouble (at least for me)
> Interestingly enough it seems like only percent_rank has double type
> https://github.com/apache/hive/blob/b047cfae872244e769f5d1c3c11811d1c49c19ad/ql/src/java/org/apache/hadoop/hive/ql/parse/type/HiveFunctionHelper.java#L392
> since this change goes back to HIVE-9133 and seems to me that removing this
> tweak is just works - I'll submit a patch to remove this conditional
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