chenkovsky commented on code in PR #16538:
URL: https://github.com/apache/datafusion/pull/16538#discussion_r2167848401
##########
datafusion/sqllogictest/test_files/aggregate.slt:
##########
@@ -7040,3 +7040,7 @@ VALUES
) GROUP BY 1 ORDER BY 1;
----
x 1
+
+statement error DataFusion error: Error during planning: WITHIN GROUP clause
is not permitted for non-ordered set aggregate function\(array_agg\)
+SELECT array_agg(DISTINCT a_varchar) within group (order by a_varchar)
+FROM (VALUES ('a'), ('d'), ('c'), ('a')) t(a_varchar);
Review Comment:
I updated this PR to support this feature.
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