alamb commented on code in PR #7037:
URL: https://github.com/apache/arrow-rs/pull/7037#discussion_r1932251283
##########
arrow-select/src/concat.rs:
##########
@@ -156,10 +158,23 @@ fn concat_lists<OffsetSize: OffsetSizeTrait>(
NullBuffer::new(nulls.finish())
});
- let values: Vec<&dyn Array> = lists
- .iter()
- .map(|x| x.values().as_ref())
- .collect::<Vec<_>>();
+ // If any of the lists have slices, we need to slice the values
+ // to ensure that the offsets are correct
+ let mut sliced_values;
Review Comment:
While I was futzing with this, I figured I would avoid `slice` on the values
unless it was ncessary. I can make this code a tiny bit simpler if we always
slice
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