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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1742) Use Hive stats when planning queries on Hive data sources
Date Fri, 27 Feb 2015 22:28:05 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14340942#comment-14340942
] 

Aman Sinha commented on DRILL-1742:
-----------------------------------

+1.  Committed fix in master branch: 02d23cb8dc21dfb151aa3d2fc64404c81d0b23cc
Note that the Hive table's row count will be used during planning process but Drill would
still do the aggregation for queries such as 'select count(*) from table'  because the statistics
cannot be fully accurate (this is unlike Parquet where the row count is leveraged to optimize
the above query). 

> Use Hive stats when planning queries on Hive data sources
> ---------------------------------------------------------
>
>                 Key: DRILL-1742
>                 URL: https://issues.apache.org/jira/browse/DRILL-1742
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Query Planning & Optimization, Storage - Hive
>    Affects Versions: 0.6.0
>            Reporter: Venki Korukanti
>            Assignee: Aman Sinha
>             Fix For: 0.8.0
>
>         Attachments: DRILL-1742.1.patch.txt, DRILL-1742.2.patch.txt, DRILL-1742.3.patch.txt,
DRILL-1742.4.patch.txt, DRILL-1742.5.patch.txt
>
>




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