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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9660) store end offset of compressed data for RG in RowIndex in ORC
Date Thu, 19 May 2016 23:39:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15292347#comment-15292347
] 

ASF GitHub Bot commented on HIVE-9660:
--------------------------------------

GitHub user omalley opened a pull request:

    https://github.com/apache/hive/pull/77

    HIVE-9660 Add length to ORC indexes so that the reader knows how much to read.

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/omalley/hive hive-9660

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/hive/pull/77.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #77
    
----
commit 014e9aaec1cb8f7257b997e953e6cc30d34a71cf
Author: Owen O'Malley <omalley@apache.org>
Date:   2016-03-26T02:39:12Z

    HIVE-11417. Move the ReaderImpl and RowReaderImpl to the ORC module,
    by making shims for the row by row reader.

commit afda4610a8c1ed9fe3adc86c6fc1b08b5fdae7aa
Author: Owen O'Malley <omalley@apache.org>
Date:   2016-05-13T21:44:34Z

    HIVE-9660 Add length to ORC indexes so that the reader knows how much
    to read.

----


> store end offset of compressed data for RG in RowIndex in ORC
> -------------------------------------------------------------
>
>                 Key: HIVE-9660
>                 URL: https://issues.apache.org/jira/browse/HIVE-9660
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-9660.01.patch, HIVE-9660.02.patch, HIVE-9660.03.patch, HIVE-9660.04.patch,
HIVE-9660.05.patch, HIVE-9660.06.patch, HIVE-9660.07.patch, HIVE-9660.07.patch, HIVE-9660.08.patch,
HIVE-9660.09.patch, HIVE-9660.10.patch, HIVE-9660.10.patch, HIVE-9660.11.patch, HIVE-9660.patch,
HIVE-9660.patch, owen-hive-9660.patch
>
>
> Right now the end offset is estimated, which in some cases results in tons of extra data
being read.
> We can add a separate array to RowIndex (positions_v2?) that stores number of compressed
buffers for each RG, or end offset, or something, to remove this estimation magic



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