ic4y commented on a change in pull request #1520:
URL: https://github.com/apache/arrow-datafusion/pull/1520#discussion_r778516821
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File path: datafusion/src/physical_plan/hash_aggregate.rs
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@@ -610,10 +615,14 @@ struct Accumulators {
map: RawTable<(u64, usize)>,
/// State for each group
- group_states: Vec<GroupState>,
+ //group_states: Vec<GroupState>,
+ group_states: BumpVec<'a, GroupState>,
}
-impl std::fmt::Debug for Accumulators {
+// will not be used multiple async, so Accumulators is Send
+unsafe impl Send for Accumulators<'_> {}
Review comment:
This doesn't work. because accumulators holds `bump` for use in async
func. async func requires `send`, but bump is `ref` not `send`.
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