zhuqi-lucas commented on code in PR #16196:
URL: https://github.com/apache/datafusion/pull/16196#discussion_r2128549342
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datafusion/physical-plan/src/execution_plan.rs:
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@@ -75,7 +75,19 @@ use futures::stream::{StreamExt, TryStreamExt};
/// [`execute`]: ExecutionPlan::execute
/// [`required_input_distribution`]: ExecutionPlan::required_input_distribution
/// [`required_input_ordering`]: ExecutionPlan::required_input_ordering
-pub trait ExecutionPlan: Debug + DisplayAs + Send + Sync {
+/// The core trait for a physical execution plan node. Every operator
+/// implements this trait. We have extended it by adding two new methods
+/// for “cooperative yielding” support:
+///
+/// 1. `yields_cooperatively()` indicates whether this operator already
+/// supports async/yield behavior internally (default: false).
+///
+/// 2. `with_cooperative_yields(self: Arc<Self>)` returns an alternate
+/// plan node that has built-in yielding; if not available, returns None.
+///
+/// Because `with_cooperative_yields` moves `Arc<Self>` into `Arc<dyn
ExecutionPlan>`,
+/// we must ensure `Self: 'static`. Therefore, we add `+ 'static` here.
+pub trait ExecutionPlan: Debug + DisplayAs + Send + Sync + 'static {
Review Comment:
Yeah, i misunderstand the logic here, thanks @ozankabak .
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