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From Jesús Camacho Rodríguez (JIRA) <j...@apache.org>
Subject [jira] [Work started] (HIVE-8926) Projections that only swap input columns are identified incorrectly as identity projections
Date Thu, 20 Nov 2014 17:48:33 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HIVE-8926 started by Jesús Camacho Rodríguez.
-----------------------------------------------------
> 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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