[jira] [Comment Edited] (HIVE-9660) store end offset of compressed data for RG in RowIndex in ORC

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-9660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15235770#comment-15235770 ] 

Sergey Shelukhin edited comment on HIVE-9660 at 4/11/16 7:17 PM:
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Removed the writer setting, added the reader setting. Also added the writer version.


was (Author: sershe):
Removed the writer setting, added the reader setting.

> 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.patch, 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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