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https://issues.apache.org/jira/browse/ARROW-10479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17446285#comment-17446285
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Stephen Yuan Jiang commented on ARROW-10479:
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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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