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Posted to issues@drill.apache.org by "Dechang Gu (JIRA)" <ji...@apache.org> on 2016/05/26 20:26:13 UTC
[jira] [Closed] (DRILL-4577) Improve performance for query on
INFORMATION_SCHEMA when HIVE is plugged in
[ https://issues.apache.org/jira/browse/DRILL-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dechang Gu closed DRILL-4577.
-----------------------------
Verified and add test cases to perf test framework
> 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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