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https://issues.apache.org/jira/browse/HIVE-4662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15185875#comment-15185875
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Aihua Xu commented on HIVE-4662:
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Yeah. distinct doesn't take effect and it doesn't make sense anyway here since
this is partitioning windowing function, we need to have one first_value for
each row in each partition.
Maybe we should give an syntax error for it?
> first_value can't have more than one order by column
> ----------------------------------------------------
>
> Key: HIVE-4662
> URL: https://issues.apache.org/jira/browse/HIVE-4662
> Project: Hive
> Issue Type: Bug
> Components: SQL
> Affects Versions: 0.11.0
> Reporter: Frans Drijver
> Assignee: Jesus Camacho Rodriguez
> Attachments: HIVE-4662.patch
>
>
> In the current implementation of the first_value function, it's not allowed
> to have more than one (1) order by column, as so:
> {quote}
> select distinct
> first_value(kastr.DEWNKNR) over ( partition by kastr.DEKTRNR order by
> kastr.DETRADT, kastr.DEVPDNR )
> from RTAVP_DRKASTR kastr
> ;
> {quote}
> Error given:
> {quote}
> FAILED: SemanticException Range based Window Frame can have only 1 Sort Key
> {quote}
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