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https://issues.apache.org/jira/browse/HIVE-18387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16371155#comment-16371155
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Zoltan Haindrich commented on HIVE-18387:
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[~jcamachorodriguez] it seems to me that [druidmini_mv
test|https://builds.apache.org/job/PreCommit-HIVE-Build/9287/testReport/org.apache.hadoop.hive.cli/TestMiniDruidCliDriver/testCliDriver_druidmini_mv_/]
is failing since this commit; there are some resultset differences as well;
could you please take a look?
> 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
> Fix For: 3.0.0
>
> Attachments: HIVE-18387.01.patch, HIVE-18387.02.patch,
> HIVE-18387.03.patch, HIVE-18387.04.patch, HIVE-18387.05.patch,
> HIVE-18387.07.patch, HIVE-18387.08.patch, HIVE-18387.09.patch,
> HIVE-18387.11.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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