ClickHouse/dbms/tests/queries/0_stateless/00552_or_nullable.sql

62 lines
1.1 KiB
MySQL
Raw Normal View History

SELECT
0 OR NULL,
1 OR NULL,
toNullable(0) OR NULL,
toNullable(1) OR NULL,
0.0 OR NULL,
0.1 OR NULL,
NULL OR 1 OR NULL,
0 OR NULL OR 1 OR NULL;
2019-07-18 08:07:24 +00:00
SELECT
0 AND NULL,
1 AND NULL,
toNullable(0) AND NULL,
toNullable(1) AND NULL,
0.0 AND NULL,
0.1 AND NULL,
NULL AND 1 AND NULL,
0 AND NULL AND 1 AND NULL;
SELECT
x,
0 OR x,
1 OR x,
x OR x,
toNullable(0) OR x,
toNullable(1) OR x,
0.0 OR x,
0.1 OR x,
x OR 1 OR x,
0 OR x OR 1 OR x
FROM (SELECT number % 2 ? number % 3 : NULL AS x FROM system.numbers LIMIT 10);
SELECT
x,
0 AND x,
1 AND x,
x AND x,
toNullable(0) AND x,
toNullable(1) AND x,
0.0 AND x,
0.1 AND x,
x AND 1 AND x,
0 AND x AND 1 AND x
FROM (SELECT number % 2 ? number % 3 : NULL AS x FROM system.numbers LIMIT 10);
DROP TABLE IF EXISTS test;
CREATE TABLE test
(
x Nullable(Int32)
) ENGINE = Log;
INSERT INTO test VALUES(1), (0), (null);
SELECT * FROM test;
SELECT x FROM test WHERE x != 0;
SELECT x FROM test WHERE x != 0 OR isNull(x);
SELECT x FROM test WHERE x != 1;
DROP TABLE test;