gene-bordegaray commented on code in PR #23239:
URL: https://github.com/apache/datafusion/pull/23239#discussion_r3506573945


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datafusion/sqllogictest/test_files/range_partitioning.slt:
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@@ -29,18 +29,16 @@ set datafusion.explain.physical_plan_only = true;
 ##########
 # TEST 1: Aggregate on Range Partition Column
 # Scanning range_key preserves source Range partitioning metadata.
-# Planning still inserts Hash repartitioning today; later optimizer PRs can
-# use this baseline to show when the repartition is removed.
+# Planning does not need Hash repartitioning because Range partitioning
+# colocates rows with equal range_key values.
 ##########
 

Review Comment:
   I have expanded the slt tests much more now 👍 
   
   THese are acting ad the main end to end coverage for the range behavior as 
they pass throughn all the optmizer rules. I left small smike and "speciific" 
cases to units



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