ClickHouse/tests/integration/test_distributed_ddl/test_replicated_alter.py

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import os
import sys
import time
import pytest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from helpers.test_tools import TSV
from .cluster import ClickHouseClusterWithDDLHelpers
@pytest.fixture(scope="module", params=["configs", "configs_secure"])
def test_cluster(request):
cluster = ClickHouseClusterWithDDLHelpers(__file__, request.param)
try:
# TODO: Fix ON CLUSTER alters when nodes have different configs. Need to canonicalize node identity.
cluster.prepare(replace_hostnames_with_ips=False)
yield cluster
instance = cluster.instances['ch1']
cluster.ddl_check_query(instance, "DROP DATABASE test ON CLUSTER 'cluster'")
cluster.ddl_check_query(instance, "DROP DATABASE IF EXISTS test2 ON CLUSTER 'cluster'")
# Check query log to ensure that DDL queries are not executed twice
time.sleep(1.5)
for instance in cluster.instances.values():
cluster.ddl_check_there_are_no_dublicates(instance)
cluster.pm_random_drops.heal_all()
finally:
cluster.shutdown()
def test_replicated_alters(test_cluster):
instance = test_cluster.instances['ch2']
test_cluster.ddl_check_query(instance, "DROP TABLE IF EXISTS merge_for_alter ON CLUSTER cluster")
test_cluster.ddl_check_query(instance, "DROP TABLE IF EXISTS all_merge_32 ON CLUSTER cluster")
test_cluster.ddl_check_query(instance, "DROP TABLE IF EXISTS all_merge_64 ON CLUSTER cluster")
# Temporarily disable random ZK packet drops, they might broke creation if ReplicatedMergeTree replicas
firewall_drops_rules = test_cluster.pm_random_drops.pop_rules()
test_cluster.ddl_check_query(instance, """
CREATE TABLE IF NOT EXISTS merge_for_alter ON CLUSTER cluster (p Date, i Int32)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/{layer}-{shard}/hits', '{replica}', p, p, 1)
""")
test_cluster.ddl_check_query(instance, """
CREATE TABLE IF NOT EXISTS all_merge_32 ON CLUSTER cluster (p Date, i Int32)
ENGINE = Distributed(cluster, default, merge_for_alter, i)
""")
test_cluster.ddl_check_query(instance, """
CREATE TABLE IF NOT EXISTS all_merge_64 ON CLUSTER cluster (p Date, i Int64, s String)
ENGINE = Distributed(cluster, default, merge_for_alter, i)
""")
for i in xrange(4):
k = (i / 2) * 2
test_cluster.insert_reliable(test_cluster.instances['ch{}'.format(i + 1)], "INSERT INTO merge_for_alter (i) VALUES ({})({})".format(k, k+1))
test_cluster.sync_replicas("merge_for_alter")
assert TSV(instance.query("SELECT i FROM all_merge_32 ORDER BY i")) == TSV(''.join(['{}\n'.format(x) for x in xrange(4)]))
test_cluster.ddl_check_query(instance, "ALTER TABLE merge_for_alter ON CLUSTER cluster MODIFY COLUMN i Int64")
test_cluster.ddl_check_query(instance, "ALTER TABLE merge_for_alter ON CLUSTER cluster ADD COLUMN s String DEFAULT toString(i)")
assert TSV(instance.query("SELECT i, s FROM all_merge_64 ORDER BY i")) == TSV(''.join(['{}\t{}\n'.format(x,x) for x in xrange(4)]))
for i in xrange(4):
k = (i / 2) * 2 + 4
test_cluster.insert_reliable(test_cluster.instances['ch{}'.format(i + 1)], "INSERT INTO merge_for_alter (p, i) VALUES (31, {})(31, {})".format(k, k+1))
test_cluster.sync_replicas("merge_for_alter")
assert TSV(instance.query("SELECT i, s FROM all_merge_64 ORDER BY i")) == TSV(''.join(['{}\t{}\n'.format(x,x) for x in xrange(8)]))
test_cluster.ddl_check_query(instance, "ALTER TABLE merge_for_alter ON CLUSTER cluster DETACH PARTITION 197002")
assert TSV(instance.query("SELECT i, s FROM all_merge_64 ORDER BY i")) == TSV(''.join(['{}\t{}\n'.format(x,x) for x in xrange(4)]))
test_cluster.ddl_check_query(instance, "DROP TABLE merge_for_alter ON CLUSTER cluster")
# Enable random ZK packet drops
test_cluster.pm_random_drops.push_rules(firewall_drops_rules)
test_cluster.ddl_check_query(instance, "DROP TABLE all_merge_32 ON CLUSTER cluster")
test_cluster.ddl_check_query(instance, "DROP TABLE all_merge_64 ON CLUSTER cluster")