Columnstore system generated stat should not be user_created=1
Create a simple columnstore table and look at sys.stats:
create table dbo.systemDefinedStatBug with (clustered columnstore index, distribution=round_robin)
select 1 as column1, 2 as column2;
from sys.stats s
where s.object_id = object_id('dbo.systemDefinedStatBug')
Notice it has a system generated "statistic". It use to be that row was marked as user_created=0 so we could easily tell that's not a regular user created stat. But these days in SQL DW it says user_created=1 on this "stat". Please fix this bug.