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From "Sean Hsuan-Yi Chu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4577) Improve performance for query on INFORMATION_SCHEMA when HIVE is plugged in
Date Tue, 05 Apr 2016 05:07:25 GMT
Sean Hsuan-Yi Chu created DRILL-4577:
----------------------------------------

             Summary: 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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