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https://issues.apache.org/jira/browse/HIVE-10685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Prasanth Jayachandran reopened HIVE-10685:
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> Alter table concatenate oparetor will cause duplicate data
> ----------------------------------------------------------
>
> Key: HIVE-10685
> URL: https://issues.apache.org/jira/browse/HIVE-10685
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.1.0
> Reporter: guoliming
> Assignee: guoliming
> Fix For: 1.2.0, 1.1.0
>
> Attachments: HIVE-10685.patch
>
>
> "Orders" table has 1500000000 rows and stored as ORC.
> {noformat}
> hive> select count(*) from orders;
> OK
> 1500000000
> Time taken: 37.692 seconds, Fetched: 1 row(s)
> {noformat}
> The table contain 14 files,the size of each file is about 2.1 ~ 3.2 GB.
> After executing command : ALTER TABLE orders CONCATENATE;
> The table is already 1530115000 rows.
> My hive version is 1.1.0.
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