[GitHub] [arrow-datafusion] yjshen commented on a diff in pull request #2296: Simplify sort streams

[GitBox <gi...@apache.org>]

yjshen commented on code in PR #2296:
URL: https://github.com/apache/arrow-datafusion/pull/2296#discussion_r854699305


##########
datafusion/core/src/physical_plan/sorts/sort_preserving_merge.rs:
##########
@@ -196,16 +197,23 @@ impl ExecutionPlan for SortPreservingMergeExec {
                             part_i,
                             context.clone(),
                         );
-                        (receiver, join_handle)
+
+                        SortedStream::new(
+                            RecordBatchReceiverStream::create(
+                                &schema,
+                                receiver,
+                                join_handle,
+                            ),
+                            0,

Review Comment:
   Yes. This field is `mem_used` for `SortedStream`. This 0 is consistent with what we report for Receivers. We currently do not count in memory usage for a single batch for all streams' `next()`.



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