Rachelint commented on code in PR #15591:
URL: https://github.com/apache/datafusion/pull/15591#discussion_r2075191981
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datafusion/functions-aggregate-common/src/aggregate/groups_accumulator/prim_op.rs:
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@@ -93,20 +94,27 @@ where
opt_filter: Option<&BooleanArray>,
total_num_groups: usize,
) -> Result<()> {
Review Comment:
But it make sense, we make `block_size` a dedicated config.
I think it can get improvement in case that `batch_size` is set to a too
samll value, and the group by cardinality is actually large.
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