Dandandan commented on code in PR #15324:
URL: https://github.com/apache/datafusion/pull/15324#discussion_r2005790136
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datafusion/functions-aggregate/src/count.rs:
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@@ -752,10 +761,245 @@ impl Accumulator for DistinctCountAccumulator {
}
}
+/// GroupsAccumulator for COUNT DISTINCT operations
+#[derive(Debug)]
+pub struct DistinctCountGroupsAccumulator {
Review Comment:
As a follow-up, this could be specialized for types as well (e.g.
`PrimitveDistinctCountGroupsAccumulator`)
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