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https://issues.apache.org/jira/browse/ARROW-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phillip Cloud updated ARROW-2177:
---------------------------------
    Description: 
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.

  was: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?


> [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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