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Posted to issues@arrow.apache.org by "Antoine Pitrou (JIRA)" <ji...@apache.org> on 2019/01/09 10:52:00 UTC

[jira] [Assigned] (ARROW-3997) [C++] [Doc] Clarify dictionary encoding integer signedness (and width?)

     [ https://issues.apache.org/jira/browse/ARROW-3997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou reassigned ARROW-3997:
-------------------------------------

    Assignee: Antoine Pitrou

> [C++] [Doc] Clarify dictionary encoding integer signedness (and width?)
> -----------------------------------------------------------------------
>
>                 Key: ARROW-3997
>                 URL: https://issues.apache.org/jira/browse/ARROW-3997
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++, Documentation, Format
>    Affects Versions: 0.11.1
>            Reporter: Antoine Pitrou
>            Assignee: Antoine Pitrou
>            Priority: Major
>
> The Arrow spec states that a dictionary-encoded array uses int32 indices. Signed or unsigned? The spec doesn't say.
> Also, the C++ implementation supports all kinds of integers as indices (8- to 64-bit, signed and unsigned). I wonder if we should at least mandate a specific signedness.



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