ozankabak commented on code in PR #9236:
URL: https://github.com/apache/arrow-datafusion/pull/9236#discussion_r1515190076


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datafusion/core/src/physical_optimizer/optimizer.rs:
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@@ -97,6 +97,8 @@ impl PhysicalOptimizer {
             // Note that one should always run this rule after running the 
EnforceDistribution rule
             // as the latter may break local sorting requirements.
             Arc::new(EnforceSorting::new()),
+            // TODO: `try_embed_to_hash_join` in the ProjectionPushdown rule 
would be block by the CoalesceBatches, so add it before CoalesceBatches. Maybe 
optimize it in the future.
+            Arc::new(ProjectionPushdown::new()),

Review Comment:
   AFAICT the original will be modified to account for the new built-in 
projection capability and this one will be removed



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