mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 16:50:48 +00:00
46 lines
1.2 KiB
Python
46 lines
1.2 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"
|