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https://issues.apache.org/jira/browse/HIVE-4073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13589989#comment-13589989
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Ashutosh Chauhan commented on HIVE-4073:
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No this query shouldn't be allowed. Should raise an exception. Comments says
queries which has windowing in those cases we can do this. But query in
question clearly has no windowing spec.
It will be good to force number of reducers to 1, else it will be wastage of
resources. But is probably fine to do later since this empty over clause is
kind of a corner case anyways.
> Make partition by optional in over clause
> -----------------------------------------
>
> Key: HIVE-4073
> URL: https://issues.apache.org/jira/browse/HIVE-4073
> Project: Hive
> Issue Type: Bug
> Components: PTF-Windowing
> Reporter: Ashutosh Chauhan
> Assignee: Brock Noland
> Attachments: HIVE-4073-0.patch, HIVE-4073-1.patch
>
>
> select s, sum( i ) over() from tt; should work.
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