[jira] [Resolved] (IMPALA-3006) Impala may use incorrect bit order with BIT_PACKED encoding

["Tim Armstrong (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-3006.
-----------------------------------
    Resolution: Won't Fix

We haven't seen this be a problem and the encoding has been deprecated for a long time.

> Impala may use incorrect bit order with BIT_PACKED encoding
> -----------------------------------------------------------
>
>                 Key: IMPALA-3006
>                 URL: https://issues.apache.org/jira/browse/IMPALA-3006
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 2.5.0
>            Reporter: Tim Armstrong
>              Labels: correctness, downgraded
>
> Wes stated on IMPALA-3000:
> {quote}It's unlikely Impala has ever seen this code path as all of its own Parquet data is encoded with the main RLE encoding – but conceivably there could be BIT_PACKED code floating around out there. But then there's a separate issue because BIT_PACKED uses MSB-ordered packing, while BitReader unpacks in LSB order (see the parquet-format). It may be worth disabling BIT_PACKED altogether if it is incorrect.{quote}



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