pepijnve commented on code in PR #21739:
URL: https://github.com/apache/datafusion/pull/21739#discussion_r3167530447


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datafusion/sqllogictest/test_files/aggregates_simplify.slt:
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@@ -170,9 +170,9 @@ physical_plan
 02)--AggregateExec: mode=Final, gby=[], aggr=[sum(alias1), sum(alias2)]
 03)----CoalescePartitionsExec
 04)------AggregateExec: mode=Partial, gby=[], aggr=[sum(alias1), sum(alias2)]
-05)--------AggregateExec: mode=FinalPartitioned, gby=[alias1@0 as alias1], 
aggr=[alias2]
+05)--------AggregateExec: mode=FinalPartitioned, gby=[alias1@0 as alias1], 
aggr=[sum(__common_expr_1) as alias2]

Review Comment:
   Perfect! This is an example of exactly the kind of issue I was struggling 
with in the explain plan output. The left hand side here which only contains 
`aggr=[alias2]` makes the plan unusable.



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