ClickHouse/tests/integration/test_temporary_data/test.py

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# pylint: disable=unused-argument
# pylint: disable=redefined-outer-name
import pytest
import time
from helpers.cluster import ClickHouseCluster
cluster = ClickHouseCluster(__file__)
node = cluster.add_instance(
"node",
stay_alive=True,
)
@pytest.fixture(scope="module")
def start_cluster():
try:
cluster.start()
yield cluster
finally:
cluster.shutdown()
def test_tmp_data_no_leftovers(start_cluster):
q = node.get_query_request
settings = {
"max_bytes_before_external_group_by": "10K",
"max_bytes_before_external_sort": "10K",
"join_algorithm": "grace_hash",
"max_bytes_in_join": "10K",
"grace_hash_join_initial_buckets": "16",
}
# Run some queries in the background to generate temporary data
q(
"SELECT ignore(*) FROM numbers(10 * 1024 * 1024) ORDER BY sipHash64(number)",
settings=settings,
)
q("SELECT * FROM system.numbers GROUP BY ALL", settings=settings)
q(
"SELECT * FROM system.numbers as t1 JOIN system.numbers as t2 USING (number)",
settings=settings,
)
# Wait a bit to make sure the temporary data is written to disk
time.sleep(5)
# Hard restart the node
node.restart_clickhouse(kill=True)
path_to_data = "/var/lib/clickhouse/"
# Check that there are no temporary files left
result = node.exec_in_container(["ls", path_to_data + "tmp/"])
assert result == ""