## sudo -H pip install PyMySQL import pymysql.cursors import pytest from helpers.cluster import ClickHouseCluster CONFIG_FILES = ['configs/dictionaries/mysql_dict1.xml', 'configs/dictionaries/mysql_dict2.xml', 'configs/remote_servers.xml'] CONFIG_FILES += ['configs/enable_dictionaries.xml', 'configs/log_conf.xml'] cluster = ClickHouseCluster(__file__) instance = cluster.add_instance('instance', main_configs=CONFIG_FILES, with_mysql=True) create_table_mysql_template = """ CREATE TABLE IF NOT EXISTS `test`.`{}` ( `id` int(11) NOT NULL, `value` varchar(50) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB; """ create_clickhouse_dictionary_table_template = """ CREATE TABLE IF NOT EXISTS `test`.`dict_table_{}` (`id` UInt64, `value` String) ENGINE = Dictionary({}) """ @pytest.fixture(scope="module") def started_cluster(): try: # time.sleep(30) cluster.start() # Create a MySQL database mysql_connection = get_mysql_conn() create_mysql_db(mysql_connection, 'test') mysql_connection.close() # Create database in ClickHouse instance.query("CREATE DATABASE IF NOT EXISTS test") # Create database in ClickChouse using MySQL protocol (will be used for data insertion) instance.query("CREATE DATABASE clickhouse_mysql ENGINE = MySQL('mysql1:3306', 'test', 'root', 'clickhouse')") yield cluster finally: cluster.shutdown() def test_load_mysql_dictionaries(started_cluster): # Load dictionaries query = instance.query query("SYSTEM RELOAD DICTIONARIES") for n in range(0, 5): # Create MySQL tables, fill them and create CH dict tables prepare_mysql_table('test', str(n)) # Check dictionaries are loaded and have correct number of elements for n in range(0, 100): # Force reload of dictionaries (each 10 iteration) if (n % 10) == 0: query("SYSTEM RELOAD DICTIONARIES") # Check number of row assert query("SELECT count() FROM `test`.`dict_table_{}`".format('test' + str(n % 5))).rstrip() == '10000' def create_mysql_db(mysql_connection, name): with mysql_connection.cursor() as cursor: cursor.execute("CREATE DATABASE IF NOT EXISTS {} DEFAULT CHARACTER SET 'utf8'".format(name)) def prepare_mysql_table(table_name, index): mysql_connection = get_mysql_conn() # Create table create_mysql_table(mysql_connection, table_name + str(index)) # Insert rows using CH query = instance.query query( "INSERT INTO `clickhouse_mysql`.{}(id, value) select number, concat('{} value ', toString(number)) from numbers(10000) ".format( table_name + str(index), table_name + str(index))) assert query("SELECT count() FROM `clickhouse_mysql`.{}".format(table_name + str(index))).rstrip() == '10000' mysql_connection.close() # Create CH Dictionary tables based on MySQL tables query(create_clickhouse_dictionary_table_template.format(table_name + str(index), 'dict' + str(index))) def get_mysql_conn(): conn = pymysql.connect(user='root', password='clickhouse', host='127.0.0.10', port=3308) return conn def create_mysql_table(conn, table_name): with conn.cursor() as cursor: cursor.execute(create_table_mysql_template.format(table_name))