kou commented on issue #41364:
URL: https://github.com/apache/arrow/issues/41364#issuecomment-2078212169
Ah, `ExecPlan` doesn't see `arrow::acero::QueryOptions::use_threads`...
Our options:
1. Add support for ordered aggregation in parallel in C++
#34311 is the PR that implements ordered aggregation.
2. Add support for the declaration API
3. Add `Arrow::ThreadPool` and use it with `Arrow::ExecutePlan`
We also need to improve `Arrow::ExecuteContext` and so on.
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