alamb commented on code in PR #27159:
URL: https://github.com/apache/datafusion/pull/27159#discussion_r4512223909


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datafusion/sqllogictest/test_files/aggregate.slt:
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@@ -759,6 +759,14 @@ SELECT approx_median(c12) FROM aggregate_test_100
 statement error
 SELECT approx_median(c1) FROM aggregate_test_100
 
+# APPROX_MEDIAN ignores aggregate ORDER BY keys. They must not be interpreted

Review Comment:
   >  APPROX_MEDIAN would keep the percentile fixed at 0.5 and process x in the 
requested order. Does this approach make sense to you?
   
   yes
   
   I am not sure how important this is  to be honest. I think I need to spend 
my time on more impactful things



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