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https://issues.apache.org/jira/browse/ARROW-12055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17307077#comment-17307077
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Ian Cook commented on ARROW-12055:
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I do not think the {{is_null}} kernel in the C++ library should change.
Database systems and such usually treat {{NaN}} as something different from
{{NULL}} and it makes sense for the C++ library to work that way. This change
should only be made in the R package, because in R, {{NaN}} is considered an
{{NA}} value.
> [R] is.na() evaluates to FALSE on Arrow NaN values
> --------------------------------------------------
>
> Key: ARROW-12055
> URL: https://issues.apache.org/jira/browse/ARROW-12055
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 3.0.0
> Reporter: Ian Cook
> Priority: Major
>
> {code:java}
> > is.na(NaN)
> [1] TRUE
> > is.na(Scalar$create(NaN))
> [1] FALSE{code}
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