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https://issues.apache.org/jira/browse/ARROW-1674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16205233#comment-16205233
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ASF GitHub Bot commented on ARROW-1674:
---------------------------------------

Github user jacques-n commented on the issue:

    https://github.com/apache/arrow/pull/1201
  
    If I understand what you're saying, I think we should be handling this the 
opposite of the way you're proposing. This is really a byte vector, not a bit 
vector. If a particular system wants to add metadata so it can know that this 
is a bit vector, it could do that with the existing custom metadata stuff [1]. 
It doesn't seem like something that Arrow should need to worry about.
    
    https://github.com/apache/arrow/blob/master/format/Schema.fbs#L285


> [Format] Add bit width metadata to Bool logical type
> ----------------------------------------------------
>
>                 Key: ARROW-1674
>                 URL: https://issues.apache.org/jira/browse/ARROW-1674
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Format
>            Reporter: Wes McKinney
>              Labels: pull-request-available
>             Fix For: 0.8.0
>
>
> Some libraries represent boolean data as a single byte per value as a vector 
> of int8/uint8 1's and 0's. It would be useful to be able to retain this 
> metadata as an optional field on the {{Bool}} table in {{Schema.fbs}}



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