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https://issues.apache.org/jira/browse/ARROW-9753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17202414#comment-17202414
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Andrew Lamb commented on ARROW-9753:
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I think [~jorgecarleitao]'s idea makes sense - there is a single thread that
gets the iterator (the one that calls `execute` on the partition) -- if that
consumer is going to process the input in parallel, I would expect the
parallelism to me managed by that consumer
> [Rust] [DataFusion] Remove the use of Mutex in ExecutionPlan trait
> ------------------------------------------------------------------
>
> Key: ARROW-9753
> URL: https://issues.apache.org/jira/browse/ARROW-9753
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust, Rust - DataFusion
> Reporter: Andy Grove
> Assignee: Andy Grove
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> The ExecutionPlan trait should not return Arc<Mutex<RecordBatchIterator>> but
> just Arc<RecordBatchIterator> since most operators do not need to be mutable.
> Those that do can use interior mutability.
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