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https://issues.apache.org/jira/browse/HIVE-12451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman resolved HIVE-12451.
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Resolution: Fixed
Fix Version/s: 3.0.0
Release Note: Concatenate is now supported on Acid tables
Target Version/s: 3.0.0, 1.3.0 (was: 1.3.0, 3.0.0)
> Orc fast file merging/concatenation should be disabled for ACID tables
> ----------------------------------------------------------------------
>
> Key: HIVE-12451
> URL: https://issues.apache.org/jira/browse/HIVE-12451
> Project: Hive
> Issue Type: Bug
> Components: ORC, Transactions
> Affects Versions: 1.3.0, 2.0.0
> Reporter: Prasanth Jayachandran
> Assignee: Eugene Koifman
> Priority: Major
> Fix For: 3.0.0
>
>
> For ACID tables merging of small files should happen only through compaction.
> We should disable "alter table .. concatenate" for ACID tables. We should
> also disable ConditionalMergeFileTask if destination is an ACID table.
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