Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/15857#discussion_r87932789
--- Diff: sql/core/src/test/resources/sql-tests/results/group-by.sql.out ---
@@ -131,3 +131,11 @@ FROM testData
struct<skewness(CAST(a AS DOUBLE)):double,kurtosis(CAST(a AS
DOUBLE)):double,min(a):int,max(a):int,avg(a):double,var_samp(CAST(a AS
DOUBLE)):double,stddev_samp(CAST(a AS
DOUBLE)):double,sum(a):bigint,count(a):bigint>
-- !query 13 output
-0.2723801058145729 -1.5069204152249134 1 3
2.142857142857143 0.8095238095238094 0.8997354108424372 15
7
+
+
+-- !query 14
+SELECT COUNT(DISTINCT b), COUNT(DISTINCT b, c) FROM (SELECT 1 AS a, 2 AS
b, 3 AS c) GROUP BY a
--- End diff --
is it also a regression test? I think you are just fixing `Expand` in this
PR.
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