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https://issues.apache.org/jira/browse/ARROW-10093?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson reassigned ARROW-10093:
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Assignee: Romain Francois (was: Neal Richardson)
> [R] Add ability to opt-out of int64 -> int demotion
> ---------------------------------------------------
>
> Key: ARROW-10093
> URL: https://issues.apache.org/jira/browse/ARROW-10093
> Project: Apache Arrow
> Issue Type: New Feature
> Components: R
> Reporter: Kyle Kavanagh
> Assignee: Romain Francois
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently, if arrow detects that every value in an int64 column can fit in a
> 32bit int, it will downcast the column an set the type to integer instead of
> integer64. Not having a mechanism to disable this optimization makes it
> tricky if you have many parallel processes (think HPC use case) performing
> the same calculation but potentially outputting different result values, some
> being >2^32 and others not. When you go to collect the resulting feather
> files from the parallel processes, the types across the files may not line up.
> Feature request is to provide an option to disable this demotion and maintain
> the source column type.
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