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From "Chaoyu Tang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13936) Add streaming support for row_number
Date Mon, 15 Aug 2016 14:12:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15421010#comment-15421010
] 

Chaoyu Tang commented on HIVE-13936:
------------------------------------

Similar to the streaming support in rank. LGTM, +1

> Add streaming support for row_number
> ------------------------------------
>
>                 Key: HIVE-13936
>                 URL: https://issues.apache.org/jira/browse/HIVE-13936
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Johndee Burks
>            Assignee: Yongzhi Chen
>         Attachments: HIVE-13936.1.patch
>
>
> Without this support row_number will cause heap issues in reducers. Example query below
against 10 million records will cause failure. 
> {code}
> select a, row_number() over (partition by a order by a desc) as row_num from j100mil;
> {code}
> Same issue different function in JIRA HIVE-7062



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