pepijnve commented on code in PR #16398:
URL: https://github.com/apache/datafusion/pull/16398#discussion_r2152793792
##########
datafusion/physical-plan/src/execution_plan.rs:
##########
@@ -912,25 +948,7 @@ impl PlanProperties {
/// 2. CoalescePartitionsExec for collapsing all of the partitions into
one without ordering guarantee
/// 3. SortPreservingMergeExec for collapsing all of the sorted partitions
into one with ordering guarantee
pub fn need_data_exchange(plan: Arc<dyn ExecutionPlan>) -> bool {
- if let Some(repartition) = plan.as_any().downcast_ref::<RepartitionExec>()
{
- !matches!(
- repartition.properties().output_partitioning(),
- Partitioning::RoundRobinBatch(_)
- )
- } else if let Some(coalesce) =
plan.as_any().downcast_ref::<CoalescePartitionsExec>()
- {
- coalesce.input().output_partitioning().partition_count() > 1
- } else if let Some(sort_preserving_merge) =
- plan.as_any().downcast_ref::<SortPreservingMergeExec>()
- {
- sort_preserving_merge
- .input()
- .output_partitioning()
- .partition_count()
- > 1
- } else {
- false
- }
+ plan.properties().evaluation_type == EvaluationType::Lazy
Review Comment:
Thanks for calling that line out. Should actually have been `== Eager`. I'll
fix that.
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