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https://issues.apache.org/jira/browse/ARROW-1674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204798#comment-16204798
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Wes McKinney commented on ARROW-1674:
-------------------------------------
The goal is to have enough metadata to support zero copy transport of memory to
or from other runtimes. As a primary representation for computation, we would
use the 1-bit variety. Right now there is no way to describe an 8-bit boolean
in the metadata, and some applications that are only transporting memory (e.g.
to/from Plasma) will not want to convert to bit-packed form
> [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
> 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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