ozankabak commented on code in PR #5322:
URL: https://github.com/apache/arrow-datafusion/pull/5322#discussion_r1119631386


##########
datafusion/core/src/physical_optimizer/pipeline_fixer.rs:
##########
@@ -182,13 +289,46 @@ fn apply_subrules_and_check_finiteness_requirements(
     physical_optimizer_subrules: &Vec<Box<PipelineFixerSubrule>>,
 ) -> Result<Option<PipelineStatePropagator>> {
     for sub_rule in physical_optimizer_subrules {
-        if let Some(value) = sub_rule(&input).transpose()? {
+        if let Some(value) = sub_rule(input.clone()).transpose()? {
             input = value;
         }
     }
     check_finiteness_requirements(input)
 }

Review Comment:
   Yes, we will be using Ballista. We haven't contributed much to Ballista yet 
as we are still focusing on fundamental streaming execution primitives, but 
will increase our focus on Ballista over time.



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