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Posted to issues@hive.apache.org by "wangwenli (JIRA)" <ji...@apache.org> on 2016/07/06 09:51:11 UTC

[jira] [Assigned] (HIVE-9044) Union input to a join operator poses problem when converting to map join [Spark Branch]

     [ https://issues.apache.org/jira/browse/HIVE-9044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

wangwenli reassigned HIVE-9044:
-------------------------------

    Assignee: wangwenli

> Union input to a join operator poses problem when converting to map join [Spark Branch]
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-9044
>                 URL: https://issues.apache.org/jira/browse/HIVE-9044
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Xuefu Zhang
>            Assignee: wangwenli
>
> Followup for HIVE-8908. When a join operator has a union input on the big table side, we are not able to convert it to map join. The problem seems to be a result of the way we handle union in generating plan and the way we convert join to map join. We need to find the way to handle this.



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