[jira] [Commented] (HIVE-18387) Minimize time that REBUILD locks the materialized view

["Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-18387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16352030#comment-16352030 ] 

Jesus Camacho Rodriguez commented on HIVE-18387:
------------------------------------------------

[~ashutoshc], I have rebased this patch after HIVE-18546 went in, this might go in before HIVE-18387. Could you take a look?
https://reviews.apache.org/r/65250/

I created HIVE-18621 as a follow-up to this issue. Replication does not work properly for views and materialized views yet, hence I think it can be tackled there.

> Minimize time that REBUILD locks the materialized view
> ------------------------------------------------------
>
>                 Key: HIVE-18387
>                 URL: https://issues.apache.org/jira/browse/HIVE-18387
>             Project: Hive
>          Issue Type: Improvement
>          Components: Materialized views
>    Affects Versions: 3.0.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>         Attachments: HIVE-18387.01.patch, HIVE-18387.02.patch, HIVE-18387.03.patch, HIVE-18387.patch
>
>
> Currently, REBUILD will block the materialized view while the final move task is being executed. The idea for this improvement is to create the new materialization in a new folder (new version) and then just flip the pointer to the folder in the MV definition in the metastore. REBUILD operations for a given MV should get an exclusive lock though, i.e., they cannot be executed concurrently.



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