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https://issues.apache.org/jira/browse/HIVE-10140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14521531#comment-14521531
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Aihua Xu commented on HIVE-10140:
---------------------------------
Yes, we have some issues in there. It should work like the oracle analytic
windows functions as follows.
http://docs.oracle.com/cd/E11882_01/server.112/e41084/functions004.htm#SQLRF06174
http://www.orafaq.com/node/55
> Window boundary is not compared correctly
> -----------------------------------------
>
> Key: HIVE-10140
> URL: https://issues.apache.org/jira/browse/HIVE-10140
> Project: Hive
> Issue Type: Bug
> Components: PTF-Windowing
> Affects Versions: 1.0.0
> Reporter: Yi Zhang
> Assignee: Aihua Xu
> Priority: Minor
>
> “ROWS between 10 preceding and 2 preceding” is not handled correctly.
> Underlying error: Window range invalid, start boundary is greater than end
> boundary: window(start=range(10 PRECEDING), end=range(2 PRECEDING))
> If I change it to “2 preceding and 10 preceding”, the syntax works but the
> results are 0 of course.
> Reason for the function: during analysis, it is sometimes desired to design
> the window to filter the most recent events, in the case of the events'
> responses are not available yet. There is a workaround for this, but it is
> better/more proper to fix the bug.
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