ClickHouse/tests/queries/0_stateless/00974_low_cardinality_cast.sql

SET cast_keep_nullable = 0;

SELECT CAST('Hello' AS LowCardinality(Nullable(String)));
SELECT CAST(Null AS LowCardinality(Nullable(String)));
SELECT CAST(CAST('Hello' AS LowCardinality(Nullable(String))) AS String);
SELECT CAST(CAST(Null AS LowCardinality(Nullable(String))) AS String); -- { serverError CANNOT_INSERT_NULL_IN_ORDINARY_COLUMN }
SELECT CAST(CAST('Hello' AS Nullable(String)) AS String);
SELECT CAST(CAST(Null AS Nullable(String)) AS String); -- { serverError CANNOT_INSERT_NULL_IN_ORDINARY_COLUMN }