mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-30 03:22:14 +00:00
31 lines
1.0 KiB
Python
31 lines
1.0 KiB
Python
import pytest
|
|
|
|
from helpers.cluster import ClickHouseCluster
|
|
|
|
cluster = ClickHouseCluster(__file__)
|
|
node1 = cluster.add_instance("instance")
|
|
|
|
|
|
@pytest.fixture(scope="module")
|
|
def start_cluster():
|
|
try:
|
|
cluster.start()
|
|
yield cluster
|
|
|
|
finally:
|
|
cluster.shutdown()
|
|
|
|
|
|
def test_explain_estimates(start_cluster):
|
|
node1.query(
|
|
"CREATE TABLE test (i Int64) ENGINE = MergeTree() ORDER BY i SETTINGS index_granularity = 16"
|
|
)
|
|
node1.query("INSERT INTO test SELECT number FROM numbers(128)")
|
|
node1.query("OPTIMIZE TABLE test")
|
|
# sum(marks) - 1 because EXPLAIN ESIMATES does not include final mark.
|
|
system_parts_result = node1.query(
|
|
"SELECT any(database), any(table), count() as parts, sum(rows) as rows, sum(marks)-1 as marks FROM system.parts WHERE database = 'default' AND table = 'test' and active = 1 GROUP BY (database, table)"
|
|
)
|
|
explain_estimates_result = node1.query("EXPLAIN ESTIMATE SELECT * FROM test")
|
|
assert system_parts_result == explain_estimates_result
|