alamb commented on code in PR #6954:
URL: https://github.com/apache/arrow-datafusion/pull/6954#discussion_r1262676664
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datafusion/physical-expr/src/aggregate/groups_accumulator/accumulate.rs:
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@@ -139,10 +139,14 @@ impl NullState {
// no nulls, no filter,
(false, None) => {
let iter = group_indices.iter().zip(data.iter());
+
for (&group_index, &new_value) in iter {
- seen_values.set_bit(group_index, true);
value_fn(group_index, new_value);
}
+ // update seen values in separate loop
Review Comment:
the idea is to use a separate loop
Note we can skip this update entirely once all the groups have been seen --
I will explore if I can figure out how to do that next.
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