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https://github.com/ClickHouse/ClickHouse.git
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308 lines
21 KiB
Python
308 lines
21 KiB
Python
import time
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import re
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import pytest
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from helpers.cluster import ClickHouseCluster
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from helpers.test_tools import assert_eq_with_retry, assert_logs_contain
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from helpers.network import PartitionManager
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cluster = ClickHouseCluster(__file__)
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main_node = cluster.add_instance('main_node', main_configs=['configs/config.xml'], user_configs=['configs/settings.xml'], with_zookeeper=True, stay_alive=True, macros={"shard": 1, "replica": 1})
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dummy_node = cluster.add_instance('dummy_node', main_configs=['configs/config.xml'], user_configs=['configs/settings.xml'], with_zookeeper=True, stay_alive=True, macros={"shard": 1, "replica": 2})
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competing_node = cluster.add_instance('competing_node', main_configs=['configs/config.xml'], user_configs=['configs/settings.xml'], with_zookeeper=True, macros={"shard": 1, "replica": 3})
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snapshotting_node = cluster.add_instance('snapshotting_node', main_configs=['configs/config.xml'], user_configs=['configs/settings.xml'], with_zookeeper=True, macros={"shard": 2, "replica": 1})
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snapshot_recovering_node = cluster.add_instance('snapshot_recovering_node', main_configs=['configs/config.xml'], user_configs=['configs/settings.xml'], with_zookeeper=True, macros={"shard": 2, "replica": 2})
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all_nodes = [main_node, dummy_node, competing_node, snapshotting_node, snapshot_recovering_node]
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uuid_regex = re.compile("[0-9a-f]{8}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{12}")
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def assert_create_query(nodes, table_name, expected):
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replace_uuid = lambda x: re.sub(uuid_regex, "uuid", x)
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query = "show create table {}".format(table_name)
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for node in nodes:
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assert_eq_with_retry(node, query, expected, get_result=replace_uuid)
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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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main_node.query("CREATE DATABASE testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard1', 'replica1');")
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dummy_node.query("CREATE DATABASE testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard1', 'replica2');")
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yield cluster
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finally:
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cluster.shutdown()
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def test_create_replicated_table(started_cluster):
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assert "Explicit zookeeper_path and replica_name are specified" in \
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main_node.query_and_get_error("CREATE TABLE testdb.replicated_table (d Date, k UInt64, i32 Int32) "
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"ENGINE=ReplicatedMergeTree('/test/tmp', 'r') ORDER BY k PARTITION BY toYYYYMM(d);")
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assert "Explicit zookeeper_path and replica_name are specified" in \
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main_node.query_and_get_error("CREATE TABLE testdb.replicated_table (d Date, k UInt64, i32 Int32) "
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"ENGINE=ReplicatedMergeTree('/test/tmp', 'r', d, k, 8192);")
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assert "Old syntax is not allowed" in \
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main_node.query_and_get_error("CREATE TABLE testdb.replicated_table (d Date, k UInt64, i32 Int32) "
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"ENGINE=ReplicatedMergeTree('/test/tmp/{shard}', '{replica}', d, k, 8192);")
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main_node.query("CREATE TABLE testdb.replicated_table (d Date, k UInt64, i32 Int32) ENGINE=ReplicatedMergeTree ORDER BY k PARTITION BY toYYYYMM(d);")
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expected = "CREATE TABLE testdb.replicated_table\\n(\\n `d` Date,\\n `k` UInt64,\\n `i32` Int32\\n)\\n" \
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"ENGINE = ReplicatedMergeTree(\\'/clickhouse/tables/uuid/{shard}\\', \\'{replica}\\')\\n" \
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"PARTITION BY toYYYYMM(d)\\nORDER BY k\\nSETTINGS index_granularity = 8192"
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assert_create_query([main_node, dummy_node], "testdb.replicated_table", expected)
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# assert without replacing uuid
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assert main_node.query("show create testdb.replicated_table") == dummy_node.query("show create testdb.replicated_table")
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@pytest.mark.parametrize("engine", ['MergeTree', 'ReplicatedMergeTree'])
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def test_simple_alter_table(started_cluster, engine):
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# test_simple_alter_table
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name = "testdb.alter_test_{}".format(engine)
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main_node.query("CREATE TABLE {} "
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"(CounterID UInt32, StartDate Date, UserID UInt32, VisitID UInt32, NestedColumn Nested(A UInt8, S String), ToDrop UInt32) "
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"ENGINE = {} PARTITION BY StartDate ORDER BY (CounterID, StartDate, intHash32(UserID), VisitID);".format(name, engine))
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main_node.query("ALTER TABLE {} ADD COLUMN Added0 UInt32;".format(name))
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main_node.query("ALTER TABLE {} ADD COLUMN Added2 UInt32;".format(name))
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main_node.query("ALTER TABLE {} ADD COLUMN Added1 UInt32 AFTER Added0;".format(name))
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main_node.query("ALTER TABLE {} ADD COLUMN AddedNested1 Nested(A UInt32, B UInt64) AFTER Added2;".format(name))
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main_node.query("ALTER TABLE {} ADD COLUMN AddedNested1.C Array(String) AFTER AddedNested1.B;".format(name))
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main_node.query("ALTER TABLE {} ADD COLUMN AddedNested2 Nested(A UInt32, B UInt64) AFTER AddedNested1;".format(name))
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full_engine = engine if not "Replicated" in engine else engine + "(\\'/clickhouse/tables/uuid/{shard}\\', \\'{replica}\\')"
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expected = "CREATE TABLE {}\\n(\\n `CounterID` UInt32,\\n `StartDate` Date,\\n `UserID` UInt32,\\n" \
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" `VisitID` UInt32,\\n `NestedColumn.A` Array(UInt8),\\n `NestedColumn.S` Array(String),\\n" \
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" `ToDrop` UInt32,\\n `Added0` UInt32,\\n `Added1` UInt32,\\n `Added2` UInt32,\\n" \
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" `AddedNested1.A` Array(UInt32),\\n `AddedNested1.B` Array(UInt64),\\n `AddedNested1.C` Array(String),\\n" \
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" `AddedNested2.A` Array(UInt32),\\n `AddedNested2.B` Array(UInt64)\\n)\\n" \
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"ENGINE = {}\\nPARTITION BY StartDate\\nORDER BY (CounterID, StartDate, intHash32(UserID), VisitID)\\n" \
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"SETTINGS index_granularity = 8192".format(name, full_engine)
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assert_create_query([main_node, dummy_node], name, expected)
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# test_create_replica_after_delay
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competing_node.query("CREATE DATABASE IF NOT EXISTS testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard1', 'replica3');")
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name = "testdb.alter_test_{}".format(engine)
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main_node.query("ALTER TABLE {} ADD COLUMN Added3 UInt32;".format(name))
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main_node.query("ALTER TABLE {} DROP COLUMN AddedNested1;".format(name))
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main_node.query("ALTER TABLE {} RENAME COLUMN Added1 TO AddedNested1;".format(name))
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full_engine = engine if not "Replicated" in engine else engine + "(\\'/clickhouse/tables/uuid/{shard}\\', \\'{replica}\\')"
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expected = "CREATE TABLE {}\\n(\\n `CounterID` UInt32,\\n `StartDate` Date,\\n `UserID` UInt32,\\n" \
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" `VisitID` UInt32,\\n `NestedColumn.A` Array(UInt8),\\n `NestedColumn.S` Array(String),\\n" \
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" `ToDrop` UInt32,\\n `Added0` UInt32,\\n `AddedNested1` UInt32,\\n `Added2` UInt32,\\n" \
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" `AddedNested2.A` Array(UInt32),\\n `AddedNested2.B` Array(UInt64),\\n `Added3` UInt32\\n)\\n" \
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"ENGINE = {}\\nPARTITION BY StartDate\\nORDER BY (CounterID, StartDate, intHash32(UserID), VisitID)\\n" \
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"SETTINGS index_granularity = 8192".format(name, full_engine)
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assert_create_query([main_node, dummy_node, competing_node], name, expected)
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def test_alters_from_different_replicas(started_cluster):
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# test_alters_from_different_replicas
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competing_node.query("CREATE DATABASE IF NOT EXISTS testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard1', 'replica3');")
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main_node.query("CREATE TABLE testdb.concurrent_test "
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"(CounterID UInt32, StartDate Date, UserID UInt32, VisitID UInt32, NestedColumn Nested(A UInt8, S String), ToDrop UInt32) "
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"ENGINE = MergeTree(StartDate, intHash32(UserID), (CounterID, StartDate, intHash32(UserID), VisitID), 8192);")
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main_node.query("CREATE TABLE testdb.dist AS testdb.concurrent_test ENGINE = Distributed(testdb, testdb, concurrent_test, CounterID)")
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dummy_node.stop_clickhouse(kill=True)
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settings = {"distributed_ddl_task_timeout": 5}
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assert "There are 1 unfinished hosts (0 of them are currently active)" in \
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competing_node.query_and_get_error("ALTER TABLE testdb.concurrent_test ADD COLUMN Added0 UInt32;", settings=settings)
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settings = {"distributed_ddl_task_timeout": 5, "distributed_ddl_output_mode": "null_status_on_timeout"}
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assert "shard1|replica2\t\\N\t\\N" in \
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main_node.query("ALTER TABLE testdb.concurrent_test ADD COLUMN Added2 UInt32;", settings=settings)
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settings = {"distributed_ddl_task_timeout": 5, "distributed_ddl_output_mode": "never_throw"}
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assert "shard1|replica2\t\\N\t\\N" in \
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competing_node.query("ALTER TABLE testdb.concurrent_test ADD COLUMN Added1 UInt32 AFTER Added0;", settings=settings)
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dummy_node.start_clickhouse()
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main_node.query("ALTER TABLE testdb.concurrent_test ADD COLUMN AddedNested1 Nested(A UInt32, B UInt64) AFTER Added2;")
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competing_node.query("ALTER TABLE testdb.concurrent_test ADD COLUMN AddedNested1.C Array(String) AFTER AddedNested1.B;")
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main_node.query("ALTER TABLE testdb.concurrent_test ADD COLUMN AddedNested2 Nested(A UInt32, B UInt64) AFTER AddedNested1;")
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expected = "CREATE TABLE testdb.concurrent_test\\n(\\n `CounterID` UInt32,\\n `StartDate` Date,\\n `UserID` UInt32,\\n" \
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" `VisitID` UInt32,\\n `NestedColumn.A` Array(UInt8),\\n `NestedColumn.S` Array(String),\\n `ToDrop` UInt32,\\n" \
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" `Added0` UInt32,\\n `Added1` UInt32,\\n `Added2` UInt32,\\n `AddedNested1.A` Array(UInt32),\\n" \
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" `AddedNested1.B` Array(UInt64),\\n `AddedNested1.C` Array(String),\\n `AddedNested2.A` Array(UInt32),\\n" \
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" `AddedNested2.B` Array(UInt64)\\n)\\n" \
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"ENGINE = MergeTree(StartDate, intHash32(UserID), (CounterID, StartDate, intHash32(UserID), VisitID), 8192)"
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assert_create_query([main_node, competing_node], "testdb.concurrent_test", expected)
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# test_create_replica_after_delay
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main_node.query("DROP TABLE testdb.concurrent_test")
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main_node.query("CREATE TABLE testdb.concurrent_test "
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"(CounterID UInt32, StartDate Date, UserID UInt32, VisitID UInt32, NestedColumn Nested(A UInt8, S String), ToDrop UInt32) "
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"ENGINE = ReplicatedMergeTree ORDER BY CounterID;")
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expected = "CREATE TABLE testdb.concurrent_test\\n(\\n `CounterID` UInt32,\\n `StartDate` Date,\\n `UserID` UInt32,\\n" \
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" `VisitID` UInt32,\\n `NestedColumn.A` Array(UInt8),\\n `NestedColumn.S` Array(String),\\n `ToDrop` UInt32\\n)\\n" \
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"ENGINE = ReplicatedMergeTree(\\'/clickhouse/tables/uuid/{shard}\\', \\'{replica}\\')\\nORDER BY CounterID\\nSETTINGS index_granularity = 8192"
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assert_create_query([main_node, competing_node], "testdb.concurrent_test", expected)
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main_node.query("INSERT INTO testdb.dist (CounterID, StartDate, UserID) SELECT number, addDays(toDate('2020-02-02'), number), intHash32(number) FROM numbers(10)")
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# test_replica_restart
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main_node.restart_clickhouse()
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expected = "CREATE TABLE testdb.concurrent_test\\n(\\n `CounterID` UInt32,\\n `StartDate` Date,\\n `UserID` UInt32,\\n" \
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" `VisitID` UInt32,\\n `NestedColumn.A` Array(UInt8),\\n `NestedColumn.S` Array(String),\\n `ToDrop` UInt32\\n)\\n" \
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"ENGINE = ReplicatedMergeTree(\\'/clickhouse/tables/uuid/{shard}\\', \\'{replica}\\')\\nORDER BY CounterID\\nSETTINGS index_granularity = 8192"
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# test_snapshot_and_snapshot_recover
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snapshotting_node.query("CREATE DATABASE testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard2', 'replica1');")
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snapshot_recovering_node.query("CREATE DATABASE testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard2', 'replica2');")
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assert_create_query(all_nodes, "testdb.concurrent_test", expected)
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main_node.query("SYSTEM FLUSH DISTRIBUTED testdb.dist")
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main_node.query("ALTER TABLE testdb.concurrent_test UPDATE StartDate = addYears(StartDate, 1) WHERE 1")
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res = main_node.query("ALTER TABLE testdb.concurrent_test DELETE WHERE UserID % 2")
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assert "shard1|replica1" in res and "shard1|replica2" in res and "shard1|replica3" in res
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assert "shard2|replica1" in res and "shard2|replica2" in res
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expected = "1\t1\tmain_node\n" \
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"1\t2\tdummy_node\n" \
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"1\t3\tcompeting_node\n" \
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"2\t1\tsnapshotting_node\n" \
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"2\t2\tsnapshot_recovering_node\n"
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assert main_node.query("SELECT shard_num, replica_num, host_name FROM system.clusters WHERE cluster='testdb'") == expected
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# test_drop_and_create_replica
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main_node.query("DROP DATABASE testdb SYNC")
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main_node.query("CREATE DATABASE testdb ENGINE = Replicated('/clickhouse/databases/test1', 'shard1', 'replica1');")
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expected = "CREATE TABLE testdb.concurrent_test\\n(\\n `CounterID` UInt32,\\n `StartDate` Date,\\n `UserID` UInt32,\\n" \
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" `VisitID` UInt32,\\n `NestedColumn.A` Array(UInt8),\\n `NestedColumn.S` Array(String),\\n `ToDrop` UInt32\\n)\\n" \
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"ENGINE = ReplicatedMergeTree(\\'/clickhouse/tables/uuid/{shard}\\', \\'{replica}\\')\\nORDER BY CounterID\\nSETTINGS index_granularity = 8192"
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assert_create_query([main_node, competing_node], "testdb.concurrent_test", expected)
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assert_create_query(all_nodes, "testdb.concurrent_test", expected)
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for node in all_nodes:
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node.query("SYSTEM SYNC REPLICA testdb.concurrent_test")
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expected = "0\t2021-02-02\t4249604106\n" \
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"1\t2021-02-03\t1343103100\n" \
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"4\t2021-02-06\t3902320246\n" \
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"7\t2021-02-09\t3844986530\n" \
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"9\t2021-02-11\t1241149650\n"
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assert_eq_with_retry(dummy_node, "SELECT CounterID, StartDate, UserID FROM testdb.dist ORDER BY CounterID", expected)
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def test_recover_staled_replica(started_cluster):
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main_node.query("CREATE DATABASE recover ENGINE = Replicated('/clickhouse/databases/recover', 'shard1', 'replica1');")
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started_cluster.get_kazoo_client('zoo1').set('/clickhouse/databases/recover/logs_to_keep', b'10')
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dummy_node.query("CREATE DATABASE recover ENGINE = Replicated('/clickhouse/databases/recover', 'shard1', 'replica2');")
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settings = {"distributed_ddl_task_timeout": 0}
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main_node.query("CREATE TABLE recover.t1 (n int) ENGINE=Memory", settings=settings)
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dummy_node.query("CREATE TABLE recover.t2 (s String) ENGINE=Memory", settings=settings)
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main_node.query("CREATE TABLE recover.mt1 (n int) ENGINE=MergeTree order by n", settings=settings)
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dummy_node.query("CREATE TABLE recover.mt2 (n int) ENGINE=MergeTree order by n", settings=settings)
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main_node.query("CREATE TABLE recover.rmt1 (n int) ENGINE=ReplicatedMergeTree order by n", settings=settings)
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dummy_node.query("CREATE TABLE recover.rmt2 (n int) ENGINE=ReplicatedMergeTree order by n", settings=settings)
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main_node.query("CREATE TABLE recover.rmt3 (n int) ENGINE=ReplicatedMergeTree order by n", settings=settings)
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dummy_node.query("CREATE TABLE recover.rmt5 (n int) ENGINE=ReplicatedMergeTree order by n", settings=settings)
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main_node.query("CREATE MATERIALIZED VIEW recover.mv1 (n int) ENGINE=ReplicatedMergeTree order by n AS SELECT n FROM recover.rmt1", settings=settings)
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dummy_node.query("CREATE MATERIALIZED VIEW recover.mv2 (n int) ENGINE=ReplicatedMergeTree order by n AS SELECT n FROM recover.rmt2", settings=settings)
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main_node.query("CREATE DICTIONARY recover.d1 (n int DEFAULT 0, m int DEFAULT 1) PRIMARY KEY n "
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"SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'rmt1' PASSWORD '' DB 'recover')) "
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"LIFETIME(MIN 1 MAX 10) LAYOUT(FLAT())")
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dummy_node.query("CREATE DICTIONARY recover.d2 (n int DEFAULT 0, m int DEFAULT 1) PRIMARY KEY n "
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"SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'rmt2' PASSWORD '' DB 'recover')) "
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"LIFETIME(MIN 1 MAX 10) LAYOUT(FLAT())")
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for table in ['t1', 't2', 'mt1', 'mt2', 'rmt1', 'rmt2', 'rmt3', 'rmt5']:
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main_node.query("INSERT INTO recover.{} VALUES (42)".format(table))
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for table in ['t1', 't2', 'mt1', 'mt2']:
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dummy_node.query("INSERT INTO recover.{} VALUES (42)".format(table))
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for table in ['rmt1', 'rmt2', 'rmt3', 'rmt5']:
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main_node.query("SYSTEM SYNC REPLICA recover.{}".format(table))
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with PartitionManager() as pm:
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pm.drop_instance_zk_connections(dummy_node)
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dummy_node.query_and_get_error("RENAME TABLE recover.t1 TO recover.m1")
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main_node.query_with_retry("RENAME TABLE recover.t1 TO recover.m1", settings=settings)
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main_node.query_with_retry("ALTER TABLE recover.mt1 ADD COLUMN m int", settings=settings)
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main_node.query_with_retry("ALTER TABLE recover.rmt1 ADD COLUMN m int", settings=settings)
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main_node.query_with_retry("RENAME TABLE recover.rmt3 TO recover.rmt4", settings=settings)
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main_node.query_with_retry("DROP TABLE recover.rmt5", settings=settings)
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main_node.query_with_retry("DROP DICTIONARY recover.d2", settings=settings)
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main_node.query_with_retry("CREATE DICTIONARY recover.d2 (n int DEFAULT 0, m int DEFAULT 1) PRIMARY KEY n "
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"SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'rmt1' PASSWORD '' DB 'recover')) "
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"LIFETIME(MIN 1 MAX 10) LAYOUT(FLAT());", settings=settings)
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inner_table = ".inner_id." + dummy_node.query_with_retry("SELECT uuid FROM system.tables WHERE database='recover' AND name='mv1'").strip()
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main_node.query_with_retry("ALTER TABLE recover.`{}` MODIFY COLUMN n int DEFAULT 42".format(inner_table), settings=settings)
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main_node.query_with_retry("ALTER TABLE recover.mv1 MODIFY QUERY SELECT m FROM recover.rmt1".format(inner_table), settings=settings)
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main_node.query_with_retry("RENAME TABLE recover.mv2 TO recover.mv3".format(inner_table), settings=settings)
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main_node.query_with_retry("CREATE TABLE recover.tmp AS recover.m1", settings=settings)
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main_node.query_with_retry("DROP TABLE recover.tmp", settings=settings)
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main_node.query_with_retry("CREATE TABLE recover.tmp AS recover.m1", settings=settings)
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main_node.query_with_retry("DROP TABLE recover.tmp", settings=settings)
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main_node.query_with_retry("CREATE TABLE recover.tmp AS recover.m1", settings=settings)
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assert main_node.query("SELECT name FROM system.tables WHERE database='recover' AND name NOT LIKE '.inner_id.%' ORDER BY name") == \
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"d1\nd2\nm1\nmt1\nmt2\nmv1\nmv3\nrmt1\nrmt2\nrmt4\nt2\ntmp\n"
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query = "SELECT name, uuid, create_table_query FROM system.tables WHERE database='recover' AND name NOT LIKE '.inner_id.%' " \
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"ORDER BY name SETTINGS show_table_uuid_in_table_create_query_if_not_nil=1"
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expected = main_node.query(query)
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assert_eq_with_retry(dummy_node, query, expected)
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assert main_node.query("SELECT count() FROM system.tables WHERE database='recover' AND name LIKE '.inner_id.%'") == "2\n"
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assert dummy_node.query("SELECT count() FROM system.tables WHERE database='recover' AND name LIKE '.inner_id.%'") == "2\n"
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for table in ['m1', 't2', 'mt1', 'mt2', 'rmt1', 'rmt2', 'rmt4', 'd1', 'd2', 'mv1', 'mv3']:
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assert main_node.query("SELECT (*,).1 FROM recover.{}".format(table)) == "42\n"
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for table in ['t2', 'rmt1', 'rmt2', 'rmt4', 'd1', 'd2', 'mt2', 'mv1', 'mv3']:
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assert dummy_node.query("SELECT (*,).1 FROM recover.{}".format(table)) == "42\n"
|
|
for table in ['m1', 'mt1']:
|
|
assert dummy_node.query("SELECT count() FROM recover.{}".format(table)) == "0\n"
|
|
|
|
assert dummy_node.query("SELECT count() FROM system.tables WHERE database='recover_broken_tables'") == "2\n"
|
|
table = dummy_node.query("SHOW TABLES FROM recover_broken_tables LIKE 'mt1_29_%'").strip()
|
|
assert dummy_node.query("SELECT (*,).1 FROM recover_broken_tables.{}".format(table)) == "42\n"
|
|
table = dummy_node.query("SHOW TABLES FROM recover_broken_tables LIKE 'rmt5_29_%'").strip()
|
|
assert dummy_node.query("SELECT (*,).1 FROM recover_broken_tables.{}".format(table)) == "42\n"
|
|
|
|
expected = "Cleaned 6 outdated objects: dropped 1 dictionaries and 3 tables, moved 2 tables"
|
|
assert_logs_contain(dummy_node, expected)
|
|
|
|
dummy_node.query("DROP TABLE recover.tmp")
|
|
assert_eq_with_retry(main_node, "SELECT count() FROM system.tables WHERE database='recover' AND name='tmp'", "0\n")
|
|
|
|
def test_startup_without_zk(started_cluster):
|
|
main_node.query("DROP DATABASE IF EXISTS testdb SYNC")
|
|
main_node.query("DROP DATABASE IF EXISTS recover SYNC")
|
|
with PartitionManager() as pm:
|
|
pm.drop_instance_zk_connections(main_node)
|
|
err = main_node.query_and_get_error("CREATE DATABASE startup ENGINE = Replicated('/clickhouse/databases/startup', 'shard1', 'replica1');")
|
|
assert "ZooKeeper" in err
|
|
main_node.query("CREATE DATABASE startup ENGINE = Replicated('/clickhouse/databases/startup', 'shard1', 'replica1');")
|
|
#main_node.query("CREATE TABLE startup.rmt (n int) ENGINE=ReplicatedMergeTree order by n")
|
|
main_node.query("CREATE TABLE startup.rmt (n int) ENGINE=MergeTree order by n")
|
|
main_node.query("INSERT INTO startup.rmt VALUES (42)")
|
|
with PartitionManager() as pm:
|
|
pm.drop_instance_zk_connections(main_node)
|
|
main_node.restart_clickhouse(stop_start_wait_sec=30)
|
|
assert main_node.query("SELECT (*,).1 FROM startup.rmt") == "42\n"
|
|
|
|
for _ in range(10):
|
|
try:
|
|
main_node.query("CREATE TABLE startup.m (n int) ENGINE=Memory")
|
|
break
|
|
except:
|
|
time.sleep(1)
|
|
|
|
main_node.query("EXCHANGE TABLES startup.rmt AND startup.m")
|
|
assert main_node.query("SELECT (*,).1 FROM startup.m") == "42\n"
|