Romain François created ARROW-3842:
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Summary: [R] RecordBatchStreamWriter api
Key: ARROW-3842
URL: https://issues.apache.org/jira/browse/ARROW-3842
Project: Apache Arrow
Issue Type: New Feature
Components: R
Reporter: Romain François
To support the "Writing and Reading Streams" section of the vignette, perhaps
we should rely more on the RecordBatchStreamWriter class and less the
`write_record_batch` function.
We should be able to write code resembling the python api :
{code:r}
batch <- ...
sink <- buffer_output_stream()
writer <- record_batch_stream_writer(sink, batch$schema())
writer$write_batch()
writer$close()
sink$getvalue()
{code}
Most of the code is there, but we need to add
- RecordBatchStreamWriter$write_batch() : write a record batch to the stream.
We already have RecordBatchStreamWriter$WriteRecordBatch
- RecordBatchStreamWriter$close() : not sure why it is lower case close() in
python but upper case in C++. We already have RecordBatchWriter$Close()
- BufferOutputStream$getvalue() : we already have BufferOutputStream$Finish()
Currently the constructor for a BufferOutputStream is buffer_output_stream(),
perhaps we can align with python and make it BufferOutputStream, that would not
clash with the `arrow::BufferOutputStream` class because of the namespacing.
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