[jira] [Created] (ARROW-7690) Cannot write parquet to OutputStream

["Bob (Jira)" <ji...@apache.org>]

Bob created ARROW-7690:
--------------------------

             Summary: 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


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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