-- SummingMergeTree with Nullable column without duplicates.
2018-02-01 00:00:00	1
2018-02-02 00:00:00	2
-- 2 2
2
2
-- 2 2
2
2
-- 2 2
2
2
-- 2 2 2
2
2
2
-- 2 2
2
2
-- SummingMergeTree with Nullable column with duplicates
2018-02-01 00:00:00	4
2018-02-02 00:00:00	6
-- 4 2
4
2
-- 4 2
4
2
-- 4 2
4
2
-- 2 2 2 2
2
2
2
2
-- 2 2
2
2
-- SummingMergeTree without Nullable column without duplicates.
2018-02-01 00:00:00	1
2018-02-02 00:00:00	2
-- 2 2
2
2
-- 2 2 
2
2
-- 2 2
2
2
-- 2 2 2
2
2
2
-- 2 2
2
2
-- SummingMergeTree without Nullable column with duplicates.
2018-02-01 00:00:00	4
2018-02-02 00:00:00	6
-- 4 2
4
2
-- 4 2
4
2
-- 4 2
4
2
-- 2 2 2
2
2
2
2
-- 2 2
2
2