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50 lines
2.1 KiB
Python
50 lines
2.1 KiB
Python
import time
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import pytest
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from helpers.cluster import ClickHouseCluster
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from helpers.client import QueryRuntimeException, QueryTimeoutExceedException
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cluster = ClickHouseCluster(__file__)
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node1 = cluster.add_instance('node1')
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node2 = cluster.add_instance('node2')
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@pytest.fixture(scope="module")
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def start_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("create table da_memory_efficient_shard(A Int64, B Int64) Engine=MergeTree order by A partition by B % 2;")
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node1.query("insert into da_memory_efficient_shard select number, number from numbers(100000);")
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node2.query("insert into da_memory_efficient_shard select number + 100000, number from numbers(100000);")
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yield cluster
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finally:
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cluster.shutdown()
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def test_remote(start_cluster):
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for flag in (0, 1):
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node1.query("set experimental_use_processors = {}".format(flag))
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node1.query("set distributed_aggregation_memory_efficient = 1, group_by_two_level_threshold = 1, group_by_two_level_threshold_bytes=1")
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res = node1.query("select sum(a) from (SELECT B, uniqExact(A) a FROM remote('node{1,2}', default.da_memory_efficient_shard) GROUP BY B)")
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assert res == '200000\n'
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node1.query("set distributed_aggregation_memory_efficient = 0")
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res = node1.query("select sum(a) from (SELECT B, uniqExact(A) a FROM remote('node{1,2}', default.da_memory_efficient_shard) GROUP BY B)")
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assert res == '200000\n'
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node1.query("set distributed_aggregation_memory_efficient = 1, group_by_two_level_threshold = 1, group_by_two_level_threshold_bytes=1")
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res = node1.query("SELECT fullHostName() AS h, uniqExact(A) AS a FROM remote('node{1,2}', default.da_memory_efficient_shard) GROUP BY h ORDER BY h;")
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assert res == 'node1\t100000\nnode2\t100000\n'
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node1.query("set distributed_aggregation_memory_efficient = 0")
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res = node1.query("SELECT fullHostName() AS h, uniqExact(A) AS a FROM remote('node{1,2}', default.da_memory_efficient_shard) GROUP BY h ORDER BY h;")
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assert res == 'node1\t100000\nnode2\t100000\n'
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