[jira] [Created] (ARROW-15040) [R] Enable write_csv_arrow to take a RecordBatchReader as input

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

Nicola Crane created ARROW-15040:
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             Summary: [R] Enable write_csv_arrow to take a RecordBatchReader as input
                 Key: ARROW-15040
                 URL: https://issues.apache.org/jira/browse/ARROW-15040
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
            Reporter: Nicola Crane


Currently, this code fails:
{code:r}
dataset <- open_dataset("some/folder/with/parquet/files")
write_csv_arrow(dataset, sink = "dataset.csv")
{code}

with this error message:
{code:r}
Error: x must be an object of class 'data.frame', 'RecordBatch', or 'Table', not 'FileSystemDataset'.
{code}

In ARROW-14741, support was added for reading from a RecordBatchReader, so we should be able to now extend {{write_csv_arrow()}} to allow this behaviour.



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