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https://issues.apache.org/jira/browse/HIVE-16017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin reassigned HIVE-16017:
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Assignee: Sergey Shelukhin
> MM tables - many queries duplicate the data after master merge
> --------------------------------------------------------------
>
> Key: HIVE-16017
> URL: https://issues.apache.org/jira/browse/HIVE-16017
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Fix For: hive-14535
>
>
> Update: happens on many more queries it looks like, and started happening
> after a recent master merge after I wasn't working on the feature for a while
> This duplicates the data (given that the original query is a self-union,
> essentially outputs it 4 times instead of 2) for either MM or non-MM tables,
> on MM branch.
> It seems to be adding correct inputs (esp. in non-MM case the inputs are the
> same as before). Presumably something in the output changes in the branch is
> broken for this case. Not sure what yet.
> {noformat}
> CREATE TABLE tbl1_mm(key int, value string) CLUSTERED BY (key) SORTED BY
> (key) INTO 2 BUCKETS;
> insert overwrite table tbl1_mm select * from src where key < 10;
> select key, value from tbl1_mm a where key < 6
> union all
> select key, value from tbl1_mm a where key < 6;
> {noformat}
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