Dandandan commented on code in PR #3473:
URL: https://github.com/apache/arrow-datafusion/pull/3473#discussion_r1012895916
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datafusion/core/src/physical_plan/aggregates/hash.rs:
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@@ -200,11 +200,6 @@ fn group_aggregate_batch(
// evaluate the grouping expressions
let group_by_values = evaluate_group_by(group_by, &batch)?;
- // evaluate the aggregation expressions.
- // We could evaluate them after the `take`, but since we need to evaluate
all
- // of them anyways, it is more performant to do it while they are together.
- let aggr_input_values = evaluate_many(aggregate_expressions, &batch)?;
Review Comment:
Won't this have a negative performance impact (as mentioned in the comments)?
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