mingmwang commented on code in PR #4122:
URL: https://github.com/apache/arrow-datafusion/pull/4122#discussion_r1017956261
##########
datafusion/core/src/execution/context.rs:
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@@ -1548,6 +1551,7 @@ impl SessionState {
Arc::new(AggregateStatistics::new()),
Arc::new(HashBuildProbeOrder::new()),
];
+ physical_optimizers.push(Arc::new(BasicEnforcement::new()));
Review Comment:
Yes, this is to cover the case that Repartition rule could add additional
RepartitionExec with RoundRobin partitioning,
and to make sure the SinglePartition is satisfied, we run the
BasicEnforcement again. Originally it was the
AddCoalescePartitionsExec here, now I replace AddCoalescePartitionsExec with
BasicEnforcement.
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