zhuqi-lucas commented on code in PR #7860:
URL: https://github.com/apache/arrow-rs/pull/7860#discussion_r2184151278
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arrow-ord/src/sort.rs:
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@@ -295,12 +295,89 @@ fn sort_bytes<T: ByteArrayType>(
options: SortOptions,
limit: Option<usize>,
) -> UInt32Array {
- let mut valids = value_indices
+ // 1. construct a list of (index, raw_bytes, length)
+ let mut valids: Vec<(u32, &[u8], usize)> = value_indices
.into_iter()
- .map(|index| (index, values.value(index as usize).as_ref()))
- .collect::<Vec<(u32, &[u8])>>();
+ .map(|idx| {
+ let slice: &[u8] = values.value(idx as usize).as_ref();
+ (idx, slice, slice.len())
+ })
+ .collect();
- sort_impl(options, &mut valids, &nulls, limit, Ord::cmp).into()
+ // 2. compute the number of non-null entries to partially sort
+ let vlimit = match (limit, options.nulls_first) {
+ (Some(l), true) => l.saturating_sub(nulls.len()).min(valids.len()),
+ _ => valids.len(),
+ };
+
+ // 3. comparator function for mixed byte views
Review Comment:
This is mistake, thank you @alamb.
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