ForEach combinator of aggregate functions: more tests [#CLICKHOUSE-2952].

dbms/tests/queries/0_stateless/00447_foreach_modifier.reference

@@ -22,3 +22,7 @@
 1	[['0','0','0'],['1','1','1'],['2','2','2'],['3','3'],['4']]
 2	[['0','0','0'],['1','1','1'],['2','2','2'],['3','3','3'],['4','4','4'],['5','5','5'],['6','6'],['7']]
 3	[['0'],['1'],['2'],['3'],['4'],['5'],['6'],['7'],['8']]
+0	[[1,2],[3]]	[[2,2],[3,3]]
+1	[[3,4,5],[4,5,6],[5,6,7],[7,8],[9]]	[[4,5],[5,6],[6,7],[8,8],[9,9]]
+2	[[6,7,8],[7,8,9],[8,9,10],[9,10,11],[10,11,12],[11,12,13],[13,14],[15]]	[[7,8],[8,9],[9,10],[10,11],[11,12],[12,13],[14,14],[15,15]]
+3	[[9],[10],[11],[12],[13],[14],[15],[16],[17]]	[[9,9],[10,10],[11,11],[12,12],[13,13],[14,14],[15,15],[16,16],[17,17]]

dbms/tests/queries/0_stateless/00447_foreach_modifier.sql

@@ -19,3 +19,5 @@ SELECT k, groupArrayForEach(arr) FROM (SELECT intDiv(number, 3) AS k, range(numb
 
 SELECT k, groupArrayForEach(arr) FROM (SELECT number % 3 AS k, arrayMap(x -> toString(x), range(number)) AS arr FROM system.numbers LIMIT 10) GROUP BY k ORDER BY k;
 SELECT k, groupArrayForEach(arr) FROM (SELECT intDiv(number, 3) AS k, arrayMap(x -> toString(x), range(number)) AS arr FROM system.numbers LIMIT 10) GROUP BY k ORDER BY k;
+
+SELECT k, groupArrayForEach(arr), quantilesExactForEach(0.5, 0.9)(arr) FROM (SELECT intDiv(number, 3) AS k, arrayMap(x -> number + x, range(number)) AS arr FROM system.numbers LIMIT 10) GROUP BY k ORDER BY k;