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https://issues.apache.org/jira/browse/ARROW-7690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17024464#comment-17024464
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Neal Richardson commented on ARROW-7690:
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Good catch! Would you like to submit a PR to fix that?
> Cannot write parquet to OutputStream
> ------------------------------------
>
> Key: ARROW-7690
> URL: https://issues.apache.org/jira/browse/ARROW-7690
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 0.15.1
> Reporter: Bob
> Priority: Major
>
> The R package does not allow for the ability to write to a FileOutputStream.
> Minimal testing code:
> library(arrow)
> tf1 <- arrow::FileOutputStream$create(path = "output.parquet")
> arrow::write_parquet(data.frame(x = 1:5), tf1)
> Throws error:
> Error in inherits(sink, OutputStream) : 'what' must be a character vector
>
> The issue appears to be in line 153 of parquet.R
> if (is.character(sink)) {
> sink <- FileOutputStream$create(sink)
> on.exit(sink$close())
> } *else if (!inherits(sink, OutputStream))* {
> abort("sink must be a file path or an OutputStream")
> }
>
> Should be !inherits(sink,'OutputStream')
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