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https://issues.apache.org/jira/browse/HIVE-4662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15197910#comment-15197910
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Jesus Camacho Rodriguez commented on HIVE-4662:
-----------------------------------------------
[~ashutoshc], if {{range unbounded preceding}} is used for row_number(), we
throw the following exception (line 402, PTFTranslator):
{noformat}
Expecting right window frame boundary for function row_number()...
{noformat}
The reason is by default, {{range unbounded preceding}} is transformed into
{{range between unbounded preceding and current row}} (this is correct).
However, GenericUDAFRowNumber sets _supportsWindow_ to false, and thus, it can
only be used with {{between unbounded preceding and unbounded following}}.
Hence, I propose we study this into more detail and maybe we solve it in a
follow-up issue, as it seems it is unrelated to this one.
What do you think? Is it OK to check this one in?
> 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-4662.01.patch, HIVE-4662.01.patch,
> HIVE-4662.01.patch, 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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