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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-11937) Improve StatsOptimizer to deal with query with additional constant columns
Date Wed, 23 Sep 2015 20:55:04 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pengcheng Xiong updated HIVE-11937:
-----------------------------------
    Attachment: HIVE-11937.01.patch

> Improve StatsOptimizer to deal with query with additional constant columns
> --------------------------------------------------------------------------
>
>                 Key: HIVE-11937
>                 URL: https://issues.apache.org/jira/browse/HIVE-11937
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-11937.01.patch
>
>
> Right now StatsOptimizer can deal with query such as "select count(1) from src" by directly
looking into the metastore. However, it can not deal with "select '1' as one, count(1) from
src" which has an additional constant column. We may improve it.



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