[jira] [Updated] (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:all-tabpanel ]

Sergey Shelukhin updated HIVE-9660:
-----------------------------------
    Attachment: HIVE-9660.02.patch

Fixing some tests. I will fix FileDump tests later, they failed for obvious reasons and there's no autoupdate it appears. 

> 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.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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