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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9660) store end offset of compressed data for RG in RowIndex in ORC
Date Sat, 09 Apr 2016 03:46:25 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HIVE-9660:
-----------------------------------
    Attachment: HIVE-9660.08.patch

Fixing the tests so they could run over the weekend.
Will address the rest of the feedback later.

> 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.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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