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26 lines
1011 B
Python
26 lines
1011 B
Python
import pytest
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from helpers.cluster import ClickHouseCluster
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cluster = ClickHouseCluster(__file__)
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node1 = cluster.add_instance('instance')
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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_explain_estimates(start_cluster):
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node1.query("CREATE TABLE test (i Int64) ENGINE = MergeTree() ORDER BY i SETTINGS index_granularity = 16")
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node1.query("INSERT INTO test SELECT number FROM numbers(128)")
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node1.query("OPTIMIZE TABLE test")
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# sum(marks) - 1 because EXPLAIN ESIMATES does not include final mark.
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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)")
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explain_estimates_result = node1.query("EXPLAIN ESTIMATE SELECT * FROM test")
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assert(system_parts_result == explain_estimates_result)
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