1000 CREATE TABLE squash_performance ( s1 String, s2 Nullable(String), a1 Array(Array(String)), a2 Array(Array(UInt32)), m1 Map(String, Array(String)), m2 Map(String, Array(UInt64)), t Tuple(String, Array(String), Map(String, String)) ) ENGINE = Null; INSERT INTO squash_performance SELECT * FROM generateRandom(42) LIMIT 500000 DROP TABLE IF EXISTS squash_performance