andygrove commented on code in PR #4050:
URL: https://github.com/apache/arrow-datafusion/pull/4050#discussion_r1010971367


##########
benchmarks/expected-plans/q16.txt:
##########
@@ -1,6 +1,6 @@
 Sort: supplier_cnt DESC NULLS FIRST, part.p_brand ASC NULLS LAST, part.p_type 
ASC NULLS LAST, part.p_size ASC NULLS LAST
   Projection: part.p_brand, part.p_type, part.p_size, COUNT(DISTINCT 
partsupp.ps_suppkey) AS supplier_cnt
-    Projection: group_alias_0 AS p_brand, group_alias_1 AS p_type, 
group_alias_2 AS p_size, COUNT(alias1) AS COUNT(DISTINCT partsupp.ps_suppkey)
+    Projection: group_alias_0 AS part.p_brand, group_alias_1 AS part.p_type, 
group_alias_2 AS part.p_size, COUNT(alias1) AS COUNT(DISTINCT 
partsupp.ps_suppkey)

Review Comment:
   Note that this logical plan was invalid before this PR because the outer 
projection was looking for `part.p_brand` and the inner projection only 
provided `p_brand`.



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