ClickHouse/tests/integration/test_dictionary_ddl_on_cluster/test.py

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import pytest
from helpers.client import QueryRuntimeException
from helpers.cluster import ClickHouseCluster
cluster = ClickHouseCluster(__file__)
ch1 = cluster.add_instance('ch1', main_configs=["configs/config.d/clusters.xml", "configs/config.d/ddl.xml"],
with_zookeeper=True)
ch2 = cluster.add_instance('ch2', main_configs=["configs/config.d/clusters.xml", "configs/config.d/ddl.xml"],
with_zookeeper=True)
ch3 = cluster.add_instance('ch3', main_configs=["configs/config.d/clusters.xml", "configs/config.d/ddl.xml"],
with_zookeeper=True)
ch4 = cluster.add_instance('ch4', main_configs=["configs/config.d/clusters.xml", "configs/config.d/ddl.xml"],
with_zookeeper=True)
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
ch1.query(
"CREATE TABLE sometbl ON CLUSTER 'cluster' (key UInt64, value String) ENGINE = MergeTree ORDER by key")
yield cluster
finally:
cluster.shutdown()
def test_dictionary_ddl_on_cluster(started_cluster):
for node in [ch1, ch2, ch3, ch4]:
assert node.query("SELECT count() from sometbl") == "0\n"
for num, node in enumerate([ch1, ch2, ch3, ch4]):
node.query("insert into sometbl values ({}, '{}')".format(num, node.name))
ch1.query(
"""
CREATE DICTIONARY somedict ON CLUSTER 'cluster' (
key UInt64,
value String
)
PRIMARY KEY key
LAYOUT(FLAT())
SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'sometbl' DB 'default'))
LIFETIME(10)
""")
for num, node in enumerate([ch1, ch2, ch3, ch4]):
assert node.query("SELECT count() from sometbl") == "1\n"
assert node.query(
"SELECT dictGetString('default.somedict', 'value', toUInt64({}))".format(num)) == node.name + '\n'
ch1.query("DETACH DICTIONARY default.somedict ON CLUSTER 'cluster'")
for node in [ch1, ch2, ch3, ch4]:
with pytest.raises(QueryRuntimeException):
node.query("SELECT dictGetString('default.somedict', 'value', toUInt64(1))")
ch1.query("ATTACH DICTIONARY default.somedict ON CLUSTER 'cluster'")
for num, node in enumerate([ch1, ch2, ch3, ch4]):
assert node.query("SELECT count() from sometbl") == "1\n"
assert node.query(
"SELECT dictGetString('default.somedict', 'value', toUInt64({}))".format(num)) == node.name + '\n'
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for num, node in enumerate([ch1, ch2, ch3, ch4]):
node.query("ALTER TABLE sometbl UPDATE value = 'new_key' WHERE 1")
ch1.query("SYSTEM RELOAD DICTIONARY ON CLUSTER 'cluster' `default.somedict`")
for num, node in enumerate([ch1, ch2, ch3, ch4]):
assert node.query(
"SELECT dictGetString('default.somedict', 'value', toUInt64({}))".format(num)) == 'new_key' + '\n'
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ch1.query("DROP DICTIONARY default.somedict ON CLUSTER 'cluster'")
for node in [ch1, ch2, ch3, ch4]:
with pytest.raises(QueryRuntimeException):
node.query("SELECT dictGetString('default.somedict', 'value', toUInt64(1))")