Andy Grove created ARROW-9550:
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Summary: [Rust] [DataFusion] Remove Rc<RefCell<_>> from hash
aggregate operator
Key: ARROW-9550
URL: https://issues.apache.org/jira/browse/ARROW-9550
Project: Apache Arrow
Issue Type: Improvement
Components: Rust, Rust - DataFusion
Reporter: Andy Grove
The hasg aggregate operator runs on a thread and therefore does not require
Rc<RefCell<_>> usage and could just use mutable references instead.
This does require some refactoring of the logic so that the code simply
iterates over the rows, calling get_mut on the hashmap per row.
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