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https://issues.apache.org/jira/browse/HIVE-9660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HIVE-9660:
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Attachment: HIVE-9660.patch
This doesn't quite work for uncompressed, I'd need to fix some things. I was
able to see at least some tests pass on this, though. Also, needs some comments
and cleanup. Let's see what fails...
> 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.WIP2.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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