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86 lines
2.5 KiB
Python
86 lines
2.5 KiB
Python
import pytest
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from helpers.cluster import ClickHouseCluster
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from helpers.client import QueryRuntimeException
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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 start_cluster():
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try:
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cluster.start()
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yield cluster
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finally:
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cluster.shutdown()
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def test_cluster(start_cluster):
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assert (
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node1.query(
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"SELECT hostName() FROM clusterAllReplicas('one_shard_two_nodes', system.one) ORDER BY ALL"
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)
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== "node1\nnode2\n"
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)
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assert set(
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node1.query(
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"""SELECT hostName(), * FROM clusterAllReplicas("one_shard_two_nodes", system.one) ORDER BY ALL"""
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).splitlines()
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) == {"node1\t0", "node2\t0"}
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assert (
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node1.query("SELECT hostName() FROM cluster('one_shard_two_nodes', system.one)")
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== "node1\n"
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)
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assert (
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node2.query("SELECT hostName() FROM cluster('one_shard_two_nodes', system.one)")
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== "node2\n"
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)
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def test_global_in(start_cluster):
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node1.query("DROP TABLE IF EXISTS u;")
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node1.query("CREATE TABLE u(uid Int16) ENGINE=Memory as select 0")
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assert set(
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node1.query(
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"""SELECT hostName(), * FROM clusterAllReplicas("one_shard_two_nodes", system.one) where dummy GLOBAL IN u ORDER BY ALL"""
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).splitlines()
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) == {"node1\t0", "node2\t0"}
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@pytest.mark.parametrize(
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"cluster",
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[
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pytest.param("one_shard_three_nodes"),
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pytest.param("two_shards_three_nodes"),
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],
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)
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def test_skip_unavailable_replica(start_cluster, cluster):
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assert (
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node1.query(
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f"SELECT hostName() FROM clusterAllReplicas('{cluster}', system.one) ORDER BY ALL settings skip_unavailable_shards=1"
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)
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== "node1\nnode2\n"
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)
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@pytest.mark.parametrize(
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"cluster",
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[
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pytest.param("one_shard_three_nodes"),
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pytest.param("two_shards_three_nodes"),
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],
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)
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def test_error_on_unavailable_replica(start_cluster, cluster):
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# clusterAllReplicas() consider each replica as shard
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# so when skip_unavailable_shards=0 - any unavailable replica should lead to an error
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with pytest.raises(QueryRuntimeException):
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node1.query(
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f"SELECT hostName() FROM clusterAllReplicas('{cluster}', system.one) ORDER BY ALL settings skip_unavailable_shards=0"
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)
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