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https://issues.apache.org/jira/browse/HIVE-5626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13803119#comment-13803119
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Sergey Shelukhin commented on HIVE-5626:
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[~ashutoshc] fyi
> 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
> Priority: Minor
>
> 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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