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https://issues.apache.org/jira/browse/DRILL-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15267771#comment-15267771
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ASF GitHub Bot commented on DRILL-4577:
---------------------------------------

Github user jinfengni commented on the pull request:

    https://github.com/apache/drill/pull/461#issuecomment-216399417
  
    +1.
    
    The patch looks good to me.
    
    Internally performance measurement shows orders of magnitude improvement 
for hive schema with up to 32k tables.  
    
     


> 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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