korowa commented on code in PR #7385:
URL: https://github.com/apache/arrow-datafusion/pull/7385#discussion_r1304469204


##########
datafusion/sqllogictest/test_files/aggregate.slt:
##########
@@ -1271,14 +1271,31 @@ NULL 4 29 1.260869565217 123 -117 23
 NULL 5 -194 -13.857142857143 118 -101 14
 NULL NULL 781 7.81 125 -117 100
 
-# TODO this querys output is non determinisitic (the order of the elements
-# differs run to run
+# TODO: array_agg_distinct output is non-determinisitic -- rewrite with 
array_sort(list_sort)
+#       unnest is also not available, so manually unnesting via CROSS JOIN
+# additional count(1) forces array_agg_distinct instead of array_agg over 
aggregated by c2 data
 #
 # csv_query_array_agg_distinct
-# query T
-# SELECT array_agg(distinct c2) FROM aggregate_test_100
-# ----
-# [4, 2, 3, 5, 1]
+query III
+WITH indices AS (

Review Comment:
   Actual aggregation input is `aggregate_test_100.c2` -- in the 
[subquery](https://github.com/apache/arrow-datafusion/pull/7385/files#diff-a60d69cf923e18b0532e7ba3470c4b728e6b00230b3ea242f3fbe95e899c5ffeR1289).
 These indices are required only to check query output -- I was't able to find 
a better way to compare randomly-ordered array with expected one -- more 
details are in the 
[thread](https://github.com/apache/arrow-datafusion/pull/7385#discussion_r1303147504)
 above



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