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https://issues.apache.org/jira/browse/HIVE-8926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-8926 started by Jesús Camacho Rodríguez.
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> Projections that only swap input columns are identified incorrectly as
> identity projections
> -------------------------------------------------------------------------------------------
>
> Key: HIVE-8926
> URL: https://issues.apache.org/jira/browse/HIVE-8926
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.15.0
> Reporter: Jesús Camacho Rodríguez
> Assignee: Jesús Camacho Rodríguez
> Fix For: 0.15.0
>
>
> Projection operators that only swap the input columns in the tuples are
> identified as identity projections, and thus incorrectly deleted from the
> plan by the _identity project removal_ optimization.
> This bug was introduced in HIVE-8435.
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