tustvold commented on code in PR #2158:
URL: https://github.com/apache/arrow-rs/pull/2158#discussion_r930042383
##########
parquet/src/arrow/arrow_reader.rs:
##########
@@ -298,11 +307,15 @@ impl Iterator for ParquetRecordBatchReader {
continue;
}
+ // try to read record
let to_read = match
front.row_count.checked_sub(self.batch_size) {
- Some(remaining) => {
- selection.push_front(RowSelection::skip(remaining));
+ Some(remaining) if remaining != 0 => {
+ // if page row count less than batch_size we must set
batch size to page row count.
+ // add check avoid dead loop
+ selection.push_front(RowSelection::select(remaining));
self.batch_size
}
+ Some(_) => self.batch_size,
Review Comment:
```suggestion
_ => self.batch_size,
```
And remove the `None` case below. If `remaining == 0` then `front.row_count
== self.batch_size`
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