jizezhang commented on code in PR #19342:
URL: https://github.com/apache/datafusion/pull/19342#discussion_r2635203037
##########
datafusion/physical-plan/src/async_func.rs:
##########
@@ -221,6 +234,49 @@ impl ExecutionPlan for AsyncFuncExec {
}
}
+struct CoalesceInputStream {
+ input_stream: Pin<Box<dyn RecordBatchStream + Send>>,
+ batch_coalescer: LimitedBatchCoalescer,
+}
+
+impl Stream for CoalesceInputStream {
+ type Item = Result<RecordBatch>;
+
+ fn poll_next(
+ mut self: Pin<&mut Self>,
+ cx: &mut Context<'_>,
+ ) -> Poll<Option<Self::Item>> {
+ let mut completed = false;
+
Review Comment:
Do we want to track `elapsed_compute` time for coalescing? e.g.
https://github.com/apache/datafusion/blob/887aa9f8c641cfcac4053da3dd5ad3c4b7ffe425/datafusion/physical-plan/src/coalesce_batches.rs#L296
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