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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2014/11/20 18:51:34 UTC
[jira] [Commented] (HIVE-8926) Projections that only swap input
columns are identified incorrectly as identity projections
[ https://issues.apache.org/jira/browse/HIVE-8926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14219664#comment-14219664 ]
Ashutosh Chauhan commented on HIVE-8926:
----------------------------------------
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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
> Components: Logical Optimizer
> Affects Versions: 0.15.0
> Reporter: Jesús Camacho Rodríguez
> Assignee: Jesús Camacho Rodríguez
> Fix For: 0.15.0
>
> Attachments: HIVE-8926.patch
>
>
> 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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