Method FlushToSink

cpp/src/arrow/csv/writer.cc:595–598

GH-36889: Flush buffer to sink and clear it to avoid stale content being written again if the next batch is empty.

  // GH-36889: Flush buffer to sink and clear it to avoid stale content
  // being written again if the next batch is empty.
  Status FlushToSink() {
    RETURN_NOT_OK(sink_->Write(data_buffer_));
    return data_buffer_->Resize(0, /*shrink_to_fit=*/false);
  }

  int64_t CalculateHeaderSize(QuotingStyle quoting_style) const {
    int64_t header_length = 0;