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64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
import pytest
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from helpers.cluster import ClickHouseCluster
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cluster = ClickHouseCluster(__file__)
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cluster_name = "parallel_replicas"
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nodes = [
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cluster.add_instance(
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f"node{num}",
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main_configs=["configs/clusters.xml"],
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with_zookeeper=False,
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image="clickhouse/clickhouse-server",
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tag="23.11", # earlier versions lead to "Not found column sum(a) in block." exception 🤷
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stay_alive=True,
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use_old_analyzer=True,
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with_installed_binary=True,
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)
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for num in range(2)
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] + [
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cluster.add_instance(
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"node2",
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main_configs=["configs/clusters.xml"],
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with_zookeeper=False,
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use_old_analyzer=True,
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)
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]
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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_backward_compatability(start_cluster):
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for node in nodes:
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node.query("create table t (a UInt64) engine = MergeTree order by tuple()")
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node.query("insert into t select number % 100000 from numbers_mt(1000000)")
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# all we want is the query to run without errors
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for node in nodes:
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assert (
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node.query(
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"""
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select sum(a)
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from t
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""",
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settings={
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"cluster_for_parallel_replicas": "parallel_replicas",
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"max_parallel_replicas": 3,
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"allow_experimental_parallel_reading_from_replicas": 1,
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"parallel_replicas_for_non_replicated_merge_tree": 1,
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},
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)
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== "49999500000\n"
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)
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for node in nodes:
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node.query("drop table t")
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