[CH] Nullability missmatch caused by `array()`

[lgbo-ustc]

Backend

CH (ClickHouse)

Bug description

select a, b, n_regionkey, c from (
	select a, b, c from (
		select
		n_regionkey as a, n_nationkey as b, array() as c
		from nation where n_nationkey % 2 = 1
		union all
		select n_nationkey as a, n_regionkey as b, array('123') as c
		from nation where n_nationkey % 2 = 0
	)
)left join (
	select n_regionkey, n_nationkey from tpch_pq.nation
)
on a = n_regionkey and b = n_nationkey

Caused by: org.apache.gluten.exception.GlutenException: Bad cast from type DB::ColumnNullable to DB::ColumnString

Spark version

None

Spark configurations

No response

System information

No response

Relevant logs

[lgbo-ustc]

accurateCastOrNull doesn't convert nested columns.