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73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
from contextlib import contextmanager
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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('node1', main_configs=['configs/remote_servers.xml'])
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node2 = cluster.add_instance('node2', main_configs=['configs/remote_servers.xml'])
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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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for node in (node1, node2):
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node.query('''
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CREATE TABLE local_table(id UInt32, val String) ENGINE = MergeTree ORDER BY id;
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CREATE TABLE local_table_2(id UInt32, val String) ENGINE = MergeTree ORDER BY id;
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''')
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node1.query("INSERT INTO local_table VALUES (1, 'node1')")
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node2.query("INSERT INTO local_table VALUES (2, 'node2')")
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node1.query('''
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CREATE TABLE distributed_table(id UInt32, val String) ENGINE = Distributed(test_cluster, default, local_table);
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CREATE TABLE distributed_table_2(id UInt32, val String) ENGINE = Distributed(test_cluster, default, local_table_2);
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CREATE TABLE merge_table(id UInt32, val String) ENGINE = Merge(default, '^distributed_table')
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''')
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yield cluster
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finally:
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cluster.shutdown()
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def test_global_in(started_cluster):
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assert node1.query("SELECT val FROM distributed_table WHERE id GLOBAL IN (SELECT toUInt32(3 - id) FROM local_table)").rstrip() \
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== 'node2'
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assert node1.query("SELECT val FROM merge_table WHERE id GLOBAL IN (SELECT toUInt32(3 - id) FROM local_table)").rstrip() \
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== 'node2'
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def test_filtering(started_cluster):
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assert node1.query("SELECT id, val FROM merge_table WHERE id = 1").rstrip() == '1\tnode1'
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assert node1.query("SELECT id + 1, val FROM merge_table WHERE id = 1").rstrip() == '2\tnode1'
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assert node1.query("SELECT id + 1 FROM merge_table WHERE val = 'node1'").rstrip() == '2'
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assert node1.query("SELECT id + 1, val FROM merge_table PREWHERE id = 1 WHERE _table != '_dummy'").rstrip() == '2\tnode1'
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assert node1.query("SELECT count() FROM merge_table PREWHERE id = 1").rstrip() == '1'
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def test_select_table_name_from_merge_over_distributed(started_cluster):
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node1.query("INSERT INTO local_table_2 VALUES (1, 'node1')")
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node2.query("INSERT INTO local_table_2 VALUES (2, 'node2')")
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node1.query("select _table == 'distributed_table' from merge_table")
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node1.query("select * from (select _table == 'distributed_table' from merge_table limit 1)")
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if __name__ == '__main__':
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with contextmanager(started_cluster)() as cluster:
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for name, instance in cluster.instances.items():
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print name, instance.ip_address
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raw_input("Cluster created, press any key to destroy...")
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