mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-29 11:02:08 +00:00
37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
|
import pytest
|
|||
|
|
from helpers.cluster import ClickHouseCluster
|
|||
|
|
|
|||
|
|
cluster = ClickHouseCluster(__file__)
|
|||
|
|
|
|||
|
|
node1 = cluster.add_instance('node1', user_configs=['configs/users.xml'], with_zookeeper=True)
|
|||
|
|
|
|||
|
|
@pytest.fixture(scope="module")
|
|||
|
|
def started_cluster():
|
|||
|
|
try:
|
|||
|
|
cluster.start()
|
|||
|
|
yield cluster
|
|||
|
|
finally:
|
|||
|
|
cluster.shutdown()
|
|||
|
|
|
|||
|
|
def test_cast_keep_nullable(started_cluster):
|
|||
|
|
setting = node1.query("SELECT value FROM system.settings WHERE name='cast_keep_nullable'")
|
|||
|
|
assert(setting.strip() == "1")
|
|||
|
|
|
|||
|
|
result = node1.query("""
|
|||
|
|
DROP TABLE IF EXISTS t;
|
|||
|
|
CREATE TABLE t (x UInt64) ENGINE = MergeTree ORDER BY tuple();
|
|||
|
|
INSERT INTO t SELECT number FROM numbers(10);
|
|||
|
|
SELECT * FROM t;
|
|||
|
|
""")
|
|||
|
|
assert(result.strip() == "0\n1\n2\n3\n4\n5\n6\n7\n8\n9")
|
|||
|
|
|
|||
|
|
error = node1.query_and_get_error("""
|
|||
|
|
SET mutations_sync = 1;
|
|||
|
|
ALTER TABLE t UPDATE x = x % 3 = 0 ? NULL : x WHERE x % 2 = 1;
|
|||
|
|
""")
|
|||
|
|
assert("DB::Exception: Cannot convert NULL value to non-Nullable type" in error)
|
|||
|
|
|
|||
|
|
result = node1.query("SELECT * FROM t;")
|
|||
|
|
assert(result.strip() == "0\n1\n2\n3\n4\n5\n6\n7\n8\n9")
|
|||
|
|
|