thinkharderdev commented on code in PR #2552:
URL: https://github.com/apache/arrow-rs/pull/2552#discussion_r951378549
##########
parquet/src/arrow/record_reader/mod.rs:
##########
@@ -135,7 +135,11 @@ where
loop {
// Try to find some records from buffers that has been read into
memory
// but not counted as seen records.
- let end_of_column =
!self.column_reader.as_mut().unwrap().has_next()?;
+
+ // Check to see if the column is exhausted. Only peek the next
page since in
+ // case we are reading to a page boundary and do not actually need
to read
+ // the next page.
+ let end_of_column =
!self.column_reader.as_mut().unwrap().peek_next()?;
Review Comment:
I think this should ultimately get cleaned up a bit. It is confusing since
we need to `peek_next` but also call `has_next` below (since the next page
needs to get loaded). It feels like the page-level logic wants to be
encapsulated inside `GenericColumnReader` but it inevitable leaks out in places
like this.
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