ClickHouse/tests/integration/test_dictionaries_update_field/test.py

## sudo -H pip install PyMySQL
import time

import pytest
from helpers.cluster import ClickHouseCluster
from helpers.cluster import ClickHouseKiller

cluster = ClickHouseCluster(__file__)

node = cluster.add_instance("main_node", main_configs=[])


@pytest.fixture(scope="module")
def started_cluster():
    try:
        cluster.start()

        node.query(
            """
            CREATE TABLE table_for_update_field_dictionary
            (
                key UInt64,
                value String,
                last_insert_time DateTime
            )
            ENGINE = TinyLog;
            """
        )

        yield cluster

    finally:
        cluster.shutdown()


@pytest.mark.parametrize(
    "dictionary_name,dictionary_type",
    [
        ("flat_update_field_dictionary", "FLAT"),
        ("simple_key_hashed_update_field_dictionary", "HASHED"),
        ("complex_key_hashed_update_field_dictionary", "COMPLEX_KEY_HASHED"),
    ],
)
def test_update_field(started_cluster, dictionary_name, dictionary_type):
    create_dictionary_query = """
        CREATE DICTIONARY {dictionary_name}
        (
            key UInt64,
            value String,
            last_insert_time DateTime
        )
        PRIMARY KEY key
        SOURCE(CLICKHOUSE(table 'table_for_update_field_dictionary' update_field 'last_insert_time'))
        LAYOUT({dictionary_type}())
        LIFETIME(1);
        """.format(
        dictionary_name=dictionary_name, dictionary_type=dictionary_type
    )

    node.query(create_dictionary_query)

    node.query(
        "INSERT INTO table_for_update_field_dictionary VALUES (1, 'First', now());"
    )
    query_result = node.query(
        "SELECT key, value FROM {dictionary_name} ORDER BY key ASC".format(
            dictionary_name=dictionary_name
        )
    )
    assert query_result == "1\tFirst\n"

    node.query(
        "INSERT INTO table_for_update_field_dictionary VALUES (2, 'Second', now());"
    )
    time.sleep(10)

    query_result = node.query(
        "SELECT key, value FROM {dictionary_name} ORDER BY key ASC".format(
            dictionary_name=dictionary_name
        )
    )

    assert query_result == "1\tFirst\n2\tSecond\n"

    node.query(
        "INSERT INTO table_for_update_field_dictionary VALUES (2, 'SecondUpdated', now());"
    )
    node.query(
        "INSERT INTO table_for_update_field_dictionary VALUES (3, 'Third', now());"
    )

    time.sleep(10)

    query_result = node.query(
        "SELECT key, value FROM {dictionary_name} ORDER BY key ASC".format(
            dictionary_name=dictionary_name
        )
    )

    assert query_result == "1\tFirst\n2\tSecondUpdated\n3\tThird\n"

    node.query("TRUNCATE TABLE table_for_update_field_dictionary")
    node.query(
        "DROP DICTIONARY {dictionary_name}".format(dictionary_name=dictionary_name)
    )