thinkharderdev commented on code in PR #2473:
URL: https://github.com/apache/arrow-rs/pull/2473#discussion_r947757732
##########
parquet/src/arrow/arrow_reader/selection.rs:
##########
@@ -116,6 +118,62 @@ impl RowSelection {
Self { selectors }
}
+ /// Given an offset index, return a mask indicating which pages are
selected along with their locations by `self`
+ pub fn page_mask(
+ &self,
+ page_locations: &[PageLocation],
+ ) -> (Vec<bool>, Vec<Range<usize>>) {
Review Comment:
The idea was to just do it it one shot to avoid iterating over the locations
again to get the ranges, but perhaps it's better to avoid overloading
Edit: Looking at this again, the `mask` was part of a previous design that
is no longer relevant, so I think we can just rename this and only return the
ranges.
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