[jira] [Resolved] (ARROW-2177) [C++] Remove support for specifying negative scale values in DecimalType

["Wes McKinney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney resolved ARROW-2177.
---------------------------------
    Resolution: Fixed

Resolved as part of ARROW-2145 https://github.com/apache/arrow/commit/bfac60dd73bffa5f7bcefc890486268036182278

> [C++] Remove support for specifying negative scale values in DecimalType
> ------------------------------------------------------------------------
>
>                 Key: ARROW-2177
>                 URL: https://issues.apache.org/jira/browse/ARROW-2177
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++, Python
>    Affects Versions: 0.8.0
>            Reporter: Phillip Cloud
>            Assignee: Phillip Cloud
>            Priority: Major
>
> Allowing both negative and positive scale makes it ambiguous what the scale of a number should be when it using exponential notation, e.g., {{0.01E3}}. Should that have a precision of 4 and a scale of 2 since it's specified as 2 points to the right of the decimal and it evaluates to 10? Or a precision of 1 and a scale of -1?
> Current it's the latter, but I think it should be the former.



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