import pytest from helpers.cluster import ClickHouseCluster from helpers.test_tools import assert_eq_with_retry cluster = ClickHouseCluster(__file__) node1 = cluster.add_instance('node1', image='yandex/clickhouse-server', tag='20.8.11.17', with_installed_binary=True, stay_alive=True) @pytest.fixture(scope="module") def start_cluster(): try: cluster.start() yield cluster finally: cluster.shutdown() def test_default_codec_read(start_cluster): node1.query("DROP TABLE IF EXISTS test_18340") node1.query(""" CREATE TABLE test_18340 ( `lns` LowCardinality(Nullable(String)), `ns` Nullable(String), `s` String, `ni64` Nullable(Int64), `ui64` UInt64, `alns` Array(LowCardinality(Nullable(String))), `ans` Array(Nullable(String)), `dt` DateTime, `i32` Int32 ) ENGINE = MergeTree() PARTITION BY i32 ORDER BY (s, farmHash64(s)) SAMPLE BY farmHash64(s) """) node1.query("insert into test_18340 values ('test', 'test', 'test', 0, 0, ['a'], ['a'], now(), 0)") assert node1.query("SELECT COUNT() FROM test_18340") == "1\n" node1.restart_with_latest_version() assert node1.query("SELECT COUNT() FROM test_18340") == "1\n"