alamb commented on code in PR #6904:
URL: https://github.com/apache/arrow-datafusion/pull/6904#discussion_r1258775045
##########
datafusion/physical-expr/src/aggregate/sum.rs:
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@@ -465,6 +518,114 @@ impl RowAccumulator for SumRowAccumulator {
}
}
+/// An accumulator to compute the sum of values in [`PrimitiveArray<T>`]
+#[derive(Debug)]
+struct SumGroupsAccumulator<T>
+where
+ T: ArrowNumericType + Send,
+{
+ /// The type of the computed sum
+ sum_data_type: DataType,
+
+ /// The type of the returned sum
+ return_data_type: DataType,
+
+ /// Sums per group, stored as the native type
+ sums: Vec<T::Native>,
+
+ /// Track nulls in the input / filters
+ null_state: NullState,
+}
+
+impl<T> SumGroupsAccumulator<T>
Review Comment:
That is a great suggestion -- I did it in e4a52f9ff5 and deleted a bunch of
duplication
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