fixed data types

ddl.sql

CREATE OR REPLACE TABLE test
(
    c1 Int64,
    c2 Nullable(String),
    c3 Array(Int64)
)
ENGINE = MergeTree
ORDER BY tuple()
SETTINGS
       min_bytes_for_wide_part = 1,
       min_rows_for_wide_part = 1;

INSERT INTO test values
    (42, 'foo', [23, 24]),
    (43, Null, [25]),
    (43, '', [26, 27]);

SELECT * FROM test;