alamb commented on code in PR #4582:
URL: https://github.com/apache/arrow-rs/pull/4582#discussion_r1280455576
##########
arrow-data/src/equal/variable_size.rs:
##########
@@ -59,14 +59,9 @@ pub(super) fn variable_sized_equal<T: ArrowNativeType +
Integer>(
let lhs_values = lhs.buffers()[1].as_slice();
let rhs_values = rhs.buffers()[1].as_slice();
- let lhs_null_count = count_nulls(lhs.nulls(), lhs_start, len);
- let rhs_null_count = count_nulls(rhs.nulls(), rhs_start, len);
-
- if lhs_null_count == 0
- && rhs_null_count == 0
- && !lhs_values.is_empty()
- && !rhs_values.is_empty()
- {
+ // Only checking one null mask here because by the time the control flow
reaches
Review Comment:
I double checked this was the case and indeed the call site `equal` checks
the null count already and then calls `equal_values` which then calls this
function
https://github.com/apache/arrow-rs/blob/a5d9118c7b420bb413b642cfc024770e38594aab/arrow-data/src/equal/mod.rs#L170-L175
https://github.com/apache/arrow-rs/blob/a5d9118c7b420bb413b642cfc024770e38594aab/arrow-data/src/equal/mod.rs#L100
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