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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4577) Improve performance for query on INFORMATION_SCHEMA when HIVE is plugged in
Date Tue, 05 Apr 2016 17:25:25 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15226708#comment-15226708
] 

ASF GitHub Bot commented on DRILL-4577:
---------------------------------------

GitHub user hsuanyi opened a pull request:

    https://github.com/apache/drill/pull/461

    DRILL-4577: Construct a specific path for querying all the tables fro…

    …m a hive database
    
    @vkorukanti Can you help review? Thanks.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/hsuanyi/incubator-drill DRILL-4577

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/drill/pull/461.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #461
    
----
commit 135464f53fe1a3070df4495e350be3e540183bfe
Author: Hsuan-Yi Chu <hsuanyi@usc.edu>
Date:   2016-04-04T23:05:04Z

    DRILL-4577: Construct a specific path for querying all the tables from a hive database

----


> Improve performance for query on INFORMATION_SCHEMA when HIVE is plugged in
> ---------------------------------------------------------------------------
>
>                 Key: DRILL-4577
>                 URL: https://issues.apache.org/jira/browse/DRILL-4577
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Storage - Hive
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Sean Hsuan-Yi Chu
>             Fix For: 1.7.0
>
>
> A query such as 
> {code}
> select * from INFORMATION_SCHEMA.`TABLES` 
> {code}
> is converted as calls to fetch all tables from storage plugins. 
> When users have Hive, the calls to hive metadata storage would be: 
> 1) get_table
> 2) get_partitions
> However, the information regarding partitions is not used in this type of queries. Beside,
a more efficient way is to fetch tables is to use get_multi_table call.



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