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https://issues.apache.org/jira/browse/ARROW-13617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17398686#comment-17398686
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Yibo Cai commented on ARROW-13617:
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Just FYI. I did a superficial investigation of unifying decimal128/256
(ARROW-13439). I abandoned the task as my approach is not very satisfying.
But I do think it's beneficial to combined decimal128/256.
> [C++] Make Decimal representations consistent
> ---------------------------------------------
>
> Key: ARROW-13617
> URL: https://issues.apache.org/jira/browse/ARROW-13617
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: David Li
> Priority: Major
>
> Right now Decimal128 is represented as two 64-bit integers (in native endian
> order) and Decimal256 is represented as a std::array (in native endian
> order). We could make these consistent (presumably there should be no
> performance impact). It may also make it easier to extract a common base
> class or other niceties.
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