mingmwang commented on code in PR #4043:
URL: https://github.com/apache/arrow-datafusion/pull/4043#discussion_r1012469233


##########
datafusion/core/src/physical_plan/filter.rs:
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@@ -231,6 +246,38 @@ impl RecordBatchStream for FilterExecStream {
     }
 }
 
+/// Return the equals Column-Pairs and Non-equals Column-Pairs
+fn collect_columns_from_predicate(predicate: &Arc<dyn PhysicalExpr>) -> 
EqualAndNonEqual {

Review Comment:
   Since this is only used by FilterExec, I would prefer to keep this as a 
private func in filter.rs



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