ClickHouse/tests/integration/test_dictionaries_null_value/test.py

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import pytest
2024-09-27 10:19:39 +00:00
from helpers.cluster import ClickHouseCluster
DICTIONARY_FILES = ["configs/dictionaries/cache.xml"]
cluster = ClickHouseCluster(__file__)
instance = cluster.add_instance("instance", dictionaries=DICTIONARY_FILES)
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
instance.query(
"""
CREATE DATABASE IF NOT EXISTS test;
DROP TABLE IF EXISTS test.source;
CREATE TABLE test.source (id UInt64, key0 UInt8, key0_str String, key1 UInt8,
StartDate Date, EndDate Date,
UInt8_ UInt8, UInt16_ UInt16, UInt32_ UInt32, UInt64_ UInt64,
Int8_ Int8, Int16_ Int16, Int32_ Int32, Int64_ Int64,
Float32_ Float32, Float64_ Float64,
String_ String,
Date_ Date, DateTime_ DateTime, Parent UInt64) ENGINE=Log;
"""
)
yield cluster
finally:
cluster.shutdown()
def test_null_value(started_cluster):
query = instance.query
assert query("select dictGetUInt8('cache', 'UInt8_', toUInt64(12121212))") == "1\n"
assert (
query("select dictGetString('cache', 'String_', toUInt64(12121212))")
== "implicit-default\n"
)
assert (
query("select dictGetDate('cache', 'Date_', toUInt64(12121212))")
== "2015-11-25\n"
)
# Check, that empty null_value interprets as default value
assert (
query("select dictGetUInt64('cache', 'UInt64_', toUInt64(12121212))") == "0\n"
)
assert (
query(
"select toTimeZone(dictGetDateTime('cache', 'DateTime_', toUInt64(12121212)), 'UTC')"
)
== "1970-01-01 00:00:00\n"
)