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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5626) enable metastore direct SQL for drop/similar queries
Date Thu, 13 Mar 2014 09:14:46 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13933031#comment-13933031
] 

Lefty Leverenz commented on HIVE-5626:
--------------------------------------

*hive.metastore.try.direct.sql.ddl* needs a description in hive-default.xml.template (or in
HiveConf.java after HIVE-6037 commits).  [~sershe], if you write a release note for this jira
I can make sure it gets into the appropriate file and add it to the wiki.

> enable metastore direct SQL for drop/similar queries
> ----------------------------------------------------
>
>                 Key: HIVE-5626
>                 URL: https://issues.apache.org/jira/browse/HIVE-5626
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Minor
>             Fix For: 0.13.0
>
>         Attachments: HIVE-5626.01.patch, HIVE-5626.02.patch, HIVE-5626.patch
>
>
> Metastore direct SQL is currently disabled for any queries running inside external transaction
(i.e. all modification queries, like dropping stuff).
> This was done to keep the strictly performance-optimization behavior when using Postgres,
which unlike other RDBMS-es fails the tx on any syntax error; so, if direct SQL is broken
there's no way to fall back. So, it is disabled for these cases.
> It is not as important because drop commands are rare, but we might want to address that.
Either by some config setting or by making it work on non-postgres DBs.



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