tustvold commented on code in PR #5848:
URL: https://github.com/apache/arrow-rs/pull/5848#discussion_r1629237531
##########
parquet/src/arrow/arrow_reader/selection.rs:
##########
@@ -111,13 +118,13 @@ impl RowSelection {
SlicesIterator::new(filter).map(move |(start, end)| start +
offset..end + offset)
});
- Self::from_consecutive_ranges(iter, total_rows)
+ Self::from_consecutive_ranges(iter, Some(total_rows))
}
/// Creates a [`RowSelection`] from an iterator of consecutive ranges to
keep
- pub(crate) fn from_consecutive_ranges<I: Iterator<Item = Range<usize>>>(
+ pub fn from_consecutive_ranges<I: Iterator<Item = Range<usize>>>(
ranges: I,
- total_rows: usize,
+ total_rows_opt: Option<usize>,
Review Comment:
What is the use-case for not knowing the total number of rows?
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