vladimirg-db commented on code in PR #57629:
URL: https://github.com/apache/spark/pull/57629#discussion_r3699493135


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docs/sql-migration-guide.md:
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@@ -24,6 +24,7 @@ license: |
 
 ## Upgrading from Spark SQL 4.2 to 4.3
 
+- Since Spark 4.3, map-typed arguments to distinct aggregates are normalized 
by key order. As a result, `COUNT(DISTINCT m)` treats maps with the same 
entries in different orders as the same value, and aggregates that return 
distinct input values, such as `COLLECT_LIST(DISTINCT m)`, return maps sorted 
by key. To restore the previous behavior, set 
`spark.sql.optimizer.insertMapSortInDistinctAggregates.enabled` to `false`.

Review Comment:
   @uros-b is this accurate? Is 4.3 the next version? 



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