rynewang commented on code in PR #48718:
URL: https://github.com/apache/arrow/pull/48718#discussion_r2685026850
##########
cpp/src/arrow/csv/writer.cc:
##########
@@ -590,6 +590,13 @@ class CSVWriterImpl : public ipc::RecordBatchWriter {
return Status::OK();
}
+ // GH-36889: Write buffer to sink and clear it to avoid stale content
+ // being written again if the next batch is empty.
+ Status WriteAndClearBuffer() {
Review Comment:
done
##########
python/pyarrow/tests/test_csv.py:
##########
@@ -2065,3 +2065,36 @@ def readinto(self, *args):
for i in range(20):
with pytest.raises(pa.ArrowInvalid):
read_csv(MyBytesIO(data))
+
+
+def test_write_csv_empty_batch_no_duplicate_header():
Review Comment:
done
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