SimpleAggregateFunction(groupUniqArrayArray is merged incorrectly in SummingMergeTree

[den-crane]

cat w.sql
drop table  if exists simple_agf_summing_mt;

create table simple_agf_summing_mt (a Int64,
grp_aggreg AggregateFunction(groupUniqArrayArray, Array(UInt64)),
grp_simple SimpleAggregateFunction(groupUniqArrayArray, Array(UInt64))
) engine = SummingMergeTree() order by a;

insert into simple_agf_summing_mt select 1 a,
groupUniqArrayArrayState([toUInt64(number)]),
groupUniqArrayArray([toUInt64(number)])
from numbers(1)
group by a;


insert into simple_agf_summing_mt select 1 a,
groupUniqArrayArrayState([toUInt64(number)]),
groupUniqArrayArray([toUInt64(number)])
from numbers(2)
group by a;

optimize table simple_agf_summing_mt final;

SELECT arraySort(groupUniqArrayArrayMerge(grp_aggreg)) gra ,
arraySort(groupUniqArrayArray(grp_simple)) grs
FROM simple_agf_summing_mt
group by a;

clickhouse-client -mn <w.sql
[0,1]	[0]

EXPECTED:
[0,1]	[0,1]

AggregateFunction(groupUniqArrayArray & SimpleAggregateFunction(groupUniqArrayArray have to produce the same result [0,1]

Let's replace SummingMergeTree engine to AggregatingMergeTree:

cat ww.sql
drop table  if exists simple_agf_summing_mt;

create table simple_agf_summing_mt (a Int64,
grp_aggreg AggregateFunction(groupUniqArrayArray, Array(UInt64)),
grp_simple SimpleAggregateFunction(groupUniqArrayArray, Array(UInt64))
) engine = AggregatingMergeTree() order by a;

insert into simple_agf_summing_mt select 1 a,
groupUniqArrayArrayState([toUInt64(number)]),
groupUniqArrayArray([toUInt64(number)])
from numbers(1)
group by a;

insert into simple_agf_summing_mt select 1 a,
groupUniqArrayArrayState([toUInt64(number)]),
groupUniqArrayArray([toUInt64(number)])
from numbers(2)
group by a;

optimize table simple_agf_summing_mt final;

SELECT
arraySort(groupUniqArrayArrayMerge(grp_aggreg)) gra ,
arraySort(groupUniqArrayArray(grp_simple)) grs
FROM simple_agf_summing_mt
group by a

cat ww.sql |clickhouse-client -mn
[0,1]	[0,1]

[den-crane]

@amosbird