tustvold commented on code in PR #8010:
URL: https://github.com/apache/arrow-datafusion/pull/8010#discussion_r1377908654
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datafusion/physical-plan/src/lib.rs:
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@@ -235,7 +235,28 @@ pub trait ExecutionPlan: Debug + DisplayAs + Send + Sync {
Ok(None)
}
- /// Begin execution of `partition`, returning a stream of
[`RecordBatch`]es.
+ /// Start plan execution for `partition`, returning a
[`SendableRecordBatchStream`] of [`RecordBatch`]es.
+ ///
+ ///
+ /// Often its needed to call
[`.await`](https://doc.rust-lang.org/std/keyword.await.html) just after the
stream async combinators.
+ /// To call it within the sync method please refer the snippet below. The
snippet can also be used to help output/debug the node execution on batch level
+ ///
+ /// ```no_run
+ /// use datafusion_common::DataFusionError;
+ ///
+ /// fn print_plan_exec() -> Result<(), DataFusionError> {
+ /// let stream = node.execute(0, task_ctx)?;
+ /// futures::stream::once(async move {
Review Comment:
This stream gets immediately dropped and therefore will never run?
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