[jira] [Commented] (ARROW-10479) [C++][Decimal] Get rid of code duplication at Decimal

["Stephen Yuan Jiang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-10479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17446285#comment-17446285 ] 

Stephen Yuan Jiang commented on ARROW-10479:
--------------------------------------------

Hello, Dmitry, any ETA on ARROW-9404 to support decimal64?

> [C++][Decimal] Get rid of code duplication at Decimal
> -----------------------------------------------------
>
>                 Key: ARROW-10479
>                 URL: https://issues.apache.org/jira/browse/ARROW-10479
>             Project: Apache Arrow
>          Issue Type: Sub-task
>          Components: C++
>            Reporter: Dmitry Chigarev
>            Assignee: Dmitry Chigarev
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> In classes related to Decimal types: [DecimalArray|https://github.com/apache/arrow/blob/9f13810d4407d1e2fd83a975c4eb281693e2ca9c/cpp/src/arrow/array/array_decimal.cc#L35], [DecimalBuilder|https://github.com/apache/arrow/blob/9f13810d4407d1e2fd83a975c4eb281693e2ca9c/cpp/src/arrow/array/builder_decimal.cc#L38], [DecimalType|https://github.com/apache/arrow/blob/9f13810d4407d1e2fd83a975c4eb281693e2ca9c/cpp/src/arrow/type.h#L879], etc, there is a lot of code duplications between decimals with different bit widths.
> The proposal here is to create base classes for them, that will contain common logic for decimals of all bit widths.
> These changes should simplify adding of new width decimals to C++ part.



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