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Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2018/04/14 05:14:00 UTC

[jira] [Commented] (HIVE-19213) Values query: Stop opening transactions on _dummy_table

    [ https://issues.apache.org/jira/browse/HIVE-19213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16438235#comment-16438235 ] 

Gopal V commented on HIVE-19213:
--------------------------------

This turned out to be related to metadata optimizer than the query-cache.

> Values query: Stop opening transactions on _dummy_table
> -------------------------------------------------------
>
>                 Key: HIVE-19213
>                 URL: https://issues.apache.org/jira/browse/HIVE-19213
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gopal V
>            Priority: Major
>
> When the -query-cache is hit- query is a values clause, the ACID TxnManager opens a txn + lock + heartbeats on _dummy_database._dummy_table.
> This is blocking values clause from jumping through the fast-paths for transactions.



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