tustvold commented on code in PR #2158:
URL: https://github.com/apache/arrow-rs/pull/2158#discussion_r930055371
##########
parquet/src/column/reader.rs:
##########
@@ -312,13 +312,20 @@ where
// If page has less rows than the remaining records to
// be skipped, skip entire page
- if metadata.num_rows < remaining {
+ while metadata.num_rows < remaining {
self.page_reader.skip_next_page()?;
remaining -= metadata.num_rows;
- continue;
+ metadata = match self.page_reader.peek_next_page()? {
+ None => return Ok(num_records - remaining),
+ Some(metadata) => metadata,
+ };
}
+ // because self.num_buffered_values == self.num_decoded_values
means
+ // we need reads a new page and set up the decoders for levels
+ self.read_new_page()?;
Review Comment:
I'm confused why this is necessary. The first thing `read_batch` does is
call `has_next` which will call `read_new_page` if `self.num_buffered_values ==
self.num_decoded_values`?
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