ozankabak commented on code in PR #15030:
URL: https://github.com/apache/datafusion/pull/15030#discussion_r1984828017
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datafusion/physical-plan/src/execution_plan.rs:
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@@ -260,13 +260,30 @@ pub trait ExecutionPlan: Debug + DisplayAs + Send + Sync {
/// used.
/// Thus, [`spawn`] is disallowed, and instead use [`SpawnedTask`].
///
+ /// To enable timely cancellation, the [`Stream`] that is returned must not
+ /// pin the CPU and must yield back to the tokio runtime regularly. This
can
Review Comment:
Right - but that is the only place AFAICT we do this. So it is (and should
be) very rare - which the docs ought to mention.
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