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