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https://issues.apache.org/jira/browse/ARROW-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16886638#comment-16886638
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Robert Fox commented on ARROW-2009:
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+1 to optimize decimal storage. I use decimal a lot to store monetary values
(no tolerance for lost precision). All of my arrow files/streams are huge! I
end up using compression more than I would like.
> [Format] Support 32- and 64-bit decimals in IPC messages
> --------------------------------------------------------
>
> Key: ARROW-2009
> URL: https://issues.apache.org/jira/browse/ARROW-2009
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Format
> Reporter: Wes McKinney
> Priority: Major
>
> Some systems may wish to send 32- or 64-bit decimal values on the wire
> without any conversions. Computations engines using Arrow may choose to
> promote these to 128-bit right away on receipt, but it would be useful to be
> enable systems with native handling of the smaller-size types to be able to
> send data via Arrow streams / IPC without extra serialization
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