Dandandan commented on code in PR #11627:
URL: https://github.com/apache/datafusion/pull/11627#discussion_r1694799488
##########
datafusion/physical-expr-common/src/aggregate/groups_accumulator/prim_op.rs:
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@@ -134,6 +134,46 @@ where
self.update_batch(values, group_indices, opt_filter, total_num_groups)
}
+ fn convert_to_state(
+ &self,
+ values: &[ArrayRef],
+ opt_filter: Option<&BooleanArray>,
+ ) -> Result<Vec<ArrayRef>> {
+ let values = values[0].as_primitive::<T>();
+ let mut state = PrimitiveBuilder::<T>::with_capacity(values.len())
+ .with_data_type(self.data_type.clone());
+
+ match opt_filter {
+ Some(filter) => {
+ values
Review Comment:
I see, we can't use filter here as we need to produce the values as is.
I think we should be able to build the values based on the values buffer and
handle nulls separately:
* no filter: just pass null mask of `values`
* filter present: `bitwise_and` both null masks
this should also be beneficial for the non-null case, as it avoids the
iterator/builder
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