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From Jesús Camacho Rodríguez (JIRA) <j...@apache.org>
Subject [jira] [Updated] (HIVE-8435) Add identity project remover optimization
Date Sat, 01 Nov 2014 05:41:33 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jesús Camacho Rodríguez updated HIVE-8435:
------------------------------------------
    Attachment: HIVE-8435.06.patch

[~ashutoshc], I attach the last version of the patch. Some plans are changed and they seem
right. However, there are some tests that result in exceptions. Some examples of the latter
using TestCliDriver: union_ppr.q, update_all_types.q, vector_data_types.q, vector_partitioned_date_time.q,
windowing.q, windowing_streaming.q.

> Add identity project remover optimization
> -----------------------------------------
>
>                 Key: HIVE-8435
>                 URL: https://issues.apache.org/jira/browse/HIVE-8435
>             Project: Hive
>          Issue Type: New Feature
>          Components: Logical Optimizer
>    Affects Versions: 0.9.0, 0.10.0, 0.11.0, 0.12.0, 0.13.0
>            Reporter: Ashutosh Chauhan
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-8435.02.patch, HIVE-8435.03.patch, HIVE-8435.03.patch, HIVE-8435.04.patch,
HIVE-8435.05.patch, HIVE-8435.05.patch, HIVE-8435.06.patch, HIVE-8435.1.patch, HIVE-8435.patch
>
>
> In some cases there is an identity project in plan which is useless. Better to optimize
it away to avoid evaluating it without any benefit at runtime.



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