Dandandan commented on code in PR #15643:
URL: https://github.com/apache/datafusion/pull/15643#discussion_r2033901020
##########
datafusion/physical-plan/src/aggregates/group_values/single_group_by/primitive.rs:
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@@ -118,25 +119,51 @@ where
for v in cols[0].as_primitive::<T>() {
let group_id = match v {
None => *self.null_group.get_or_insert_with(|| {
- let group_id = self.values.len();
- self.values.push(Default::default());
+ let group_id = self.values.len().saturating_sub(1) *
BLOCK_SIZE
Review Comment:
Probably better to do it upfront
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