[GitHub] [arrow-datafusion] alamb commented on a diff in pull request #5754: Improving optimizer performance by eliminating unnecessary sort and distribution passes, add more SymmetricHashJoin improvements

["alamb (via GitHub)" <gi...@apache.org>]

alamb commented on code in PR #5754:
URL: https://github.com/apache/arrow-datafusion/pull/5754#discussion_r1156374170


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datafusion/common/src/config.rs:
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@@ -280,6 +280,10 @@ config_namespace! {
         /// using the provided `target_partitions` level
         pub repartition_joins: bool, default = true
 
+        /// Should DataFusion allow symmetric hash joins for unbounded data sources even when
+        /// its inputs do not have any ordering or filtering
+        pub allow_symmetric_joins_without_pruning: bool, default = true

Review Comment:
   Thank you -- this explanation and the updated comments help to clarify



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