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https://issues.apache.org/jira/browse/HIVE-12825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HIVE-12825:
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Summary: select * may not work with ctas if there are duplicate column
names in the "as select" query (was: select * may not work with ctas)
> select * may not work with ctas if there are duplicate column names in the
> "as select" query
> --------------------------------------------------------------------------------------------
>
> Key: HIVE-12825
> URL: https://issues.apache.org/jira/browse/HIVE-12825
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
>
> > create table foo3 as select * from foo2 f1 cross join foo2 f2;
> Warning: Map Join MAPJOIN[7][bigTable=f1] in task 'Map 1' is a cross product
> FAILED: SemanticException [Error 10036]: Duplicate column name: f
> If the column names are not specified, ctas generates them; for select *, it
> should also generate them if there are collisions.
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