ClickHouse/tests/integration/test_postgresql_database_engine/test.py

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2020-12-21 19:20:56 +00:00
import pytest
import time
import psycopg2
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import assert_eq_with_retry
from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT
cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance('node1', main_configs=[], with_postgres=True)
postgres_table_template = """
CREATE TABLE IF NOT EXISTS {} (
id Integer NOT NULL, value Integer, PRIMARY KEY (id))
"""
def get_postgres_conn(database=False):
if database == True:
conn_string = "host='localhost' dbname='test_database' user='postgres' password='mysecretpassword'"
else:
conn_string = "host='localhost' user='postgres' password='mysecretpassword'"
conn = psycopg2.connect(conn_string)
conn.set_isolation_level(ISOLATION_LEVEL_AUTOCOMMIT)
conn.autocommit = True
return conn
def create_postgres_db(cursor, name):
cursor.execute("CREATE DATABASE {}".format(name))
def create_postgres_table(cursor, table_name):
# database was specified in connection string
cursor.execute(postgres_table_template.format(table_name))
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
conn = get_postgres_conn()
cursor = conn.cursor()
create_postgres_db(cursor, 'test_database')
yield cluster
finally:
cluster.shutdown()
def test_postgres_database_engine_with_postgres_ddl(started_cluster):
# connect to database as well
conn = get_postgres_conn(True)
cursor = conn.cursor()
node1.query(
"CREATE DATABASE test_database ENGINE = PostgreSQL('postgres1:5432', 'test_database', 'postgres', 'mysecretpassword')")
assert 'test_database' in node1.query('SHOW DATABASES')
create_postgres_table(cursor, 'test_table')
assert 'test_table' in node1.query('SHOW TABLES FROM test_database')
cursor.execute('ALTER TABLE test_table ADD COLUMN data Text')
assert 'data' in node1.query("SELECT name FROM system.columns WHERE table = 'test_table' AND database = 'test_database'")
cursor.execute('ALTER TABLE test_table DROP COLUMN data')
assert 'data' not in node1.query("SELECT name FROM system.columns WHERE table = 'test_table' AND database = 'test_database'")
node1.query("DROP DATABASE test_database")
assert 'test_database' not in node1.query('SHOW DATABASES')
def test_postgresql_database_engine_with_clickhouse_ddl(started_cluster):
conn = get_postgres_conn(True)
cursor = conn.cursor()
node1.query(
"CREATE DATABASE test_database ENGINE = PostgreSQL('postgres1:5432', 'test_database', 'postgres', 'mysecretpassword')")
create_postgres_table(cursor, 'test_table')
assert 'test_table' in node1.query('SHOW TABLES FROM test_database')
node1.query("DROP TABLE test_database.test_table")
assert 'test_table' not in node1.query('SHOW TABLES FROM test_database')
node1.query("ATTACH TABLE test_database.test_table")
assert 'test_table' in node1.query('SHOW TABLES FROM test_database')
node1.query("DETACH TABLE test_database.test_table")
assert 'test_table' not in node1.query('SHOW TABLES FROM test_database')
node1.query("ATTACH TABLE test_database.test_table")
assert 'test_table' in node1.query('SHOW TABLES FROM test_database')
node1.query("DROP DATABASE test_database")
assert 'test_database' not in node1.query('SHOW DATABASES')
def test_postgresql_database_engine_queries(started_cluster):
conn = get_postgres_conn(True)
cursor = conn.cursor()
node1.query(
"CREATE DATABASE test_database ENGINE = PostgreSQL('postgres1:5432', 'test_database', 'postgres', 'mysecretpassword')")
create_postgres_table(cursor, 'test_table')
assert node1.query("SELECT count() FROM test_database.test_table").rstrip() == '0'
node1.query("INSERT INTO test_database.test_table SELECT number, number from numbers(10000)")
assert node1.query("SELECT count() FROM test_database.test_table").rstrip() == '10000'
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cursor.execute('DROP TABLE test_table;')
assert 'test_table' not in node1.query('SHOW TABLES FROM test_database')
node1.query("DROP DATABASE test_database")
assert 'test_database' not in node1.query('SHOW DATABASES')
def test_get_create_table_query_with_multidim_arrays(started_cluster):
conn = get_postgres_conn(True)
cursor = conn.cursor()
node1.query(
"CREATE DATABASE test_database ENGINE = PostgreSQL('postgres1:5432', 'test_database', 'postgres', 'mysecretpassword')")
cursor.execute("""
CREATE TABLE IF NOT EXISTS array_columns (
b Integer[][][] NOT NULL,
c Integer[][][]
)""")
node1.query("DETACH TABLE test_database.array_columns")
node1.query("ATTACH TABLE test_database.array_columns")
node1.query("INSERT INTO test_database.array_columns "
"VALUES ("
"[[[1, 1], [1, 1]], [[3, 3], [3, 3]], [[4, 4], [5, 5]]], "
"[[[1, NULL], [NULL, 1]], [[NULL, NULL], [NULL, NULL]], [[4, 4], [5, 5]]] "
")")
result = node1.query('''
SELECT * FROM test_database.array_columns''')
expected = (
"[[[1,1],[1,1]],[[3,3],[3,3]],[[4,4],[5,5]]]\t"
"[[[1,NULL],[NULL,1]],[[NULL,NULL],[NULL,NULL]],[[4,4],[5,5]]]\n"
)
assert(result == expected)
node1.query("DROP DATABASE test_database")
assert 'test_database' not in node1.query('SHOW DATABASES')
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def test_postgresql_database_engine_table_cache(started_cluster):
conn = get_postgres_conn(True)
cursor = conn.cursor()
node1.query(
"CREATE DATABASE test_database ENGINE = PostgreSQL('postgres1:5432', 'test_database', 'postgres', 'mysecretpassword', 1)")
create_postgres_table(cursor, 'test_table')
assert node1.query('DESCRIBE TABLE test_database.test_table').rstrip() == 'id\tInt32\t\t\t\t\t\nvalue\tNullable(Int32)'
cursor.execute('ALTER TABLE test_table ADD COLUMN data Text')
assert node1.query('DESCRIBE TABLE test_database.test_table').rstrip() == 'id\tInt32\t\t\t\t\t\nvalue\tNullable(Int32)'
node1.query("DETACH TABLE test_database.test_table")
assert 'test_table' not in node1.query('SHOW TABLES FROM test_database')
node1.query("ATTACH TABLE test_database.test_table")
assert 'test_table' in node1.query('SHOW TABLES FROM test_database')
assert node1.query('DESCRIBE TABLE test_database.test_table').rstrip() == 'id\tInt32\t\t\t\t\t\nvalue\tNullable(Int32)\t\t\t\t\t\ndata\tNullable(String)'
node1.query("DROP TABLE test_database.test_table")
assert 'test_table' not in node1.query('SHOW TABLES FROM test_database')
node1.query("ATTACH TABLE test_database.test_table")
assert 'test_table' in node1.query('SHOW TABLES FROM test_database')
node1.query("INSERT INTO test_database.test_table SELECT number, number, toString(number) from numbers(10000)")
assert node1.query("SELECT count() FROM test_database.test_table").rstrip() == '10000'
cursor.execute('DROP TABLE test_table;')
assert 'test_table' not in node1.query('SHOW TABLES FROM test_database')
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node1.query("DROP DATABASE test_database")
assert 'test_database' not in node1.query('SHOW DATABASES')
if __name__ == '__main__':
cluster.start()
input("Cluster created, press any key to destroy...")
cluster.shutdown()