mapleFU commented on code in PR #39211:
URL: https://github.com/apache/arrow/pull/39211#discussion_r1425339900
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cpp/src/parquet/arrow/writer.cc:
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@@ -462,7 +462,8 @@ class FileWriterImpl : public FileWriter {
offset += batch_size;
// Flush current row group if it is full.
- if (row_group_writer_->num_rows() >= max_row_group_length) {
+ if (row_group_writer_->num_rows() >= max_row_group_length &&
+ offset < batch.num_rows()) {
Review Comment:
Hmmm `NewBufferedRowGroup()` here is as "if we have more rows needs to
write, we need to switch a buffered-writer", and this is better to put after
the write? What would you expect `WriteBatch` and `NewBufferedRowGroup` to be
like?
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