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base_engine_spec_tests.py
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base_engine_spec_tests.py
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import datetime
from unittest import mock
import pytest
from superset.connectors.sqla.models import TableColumn
from superset.db_engine_specs import load_engine_specs
from superset.db_engine_specs.base import (
BaseEngineSpec,
BasicParametersMixin,
builtin_time_grains,
LimitMethod,
)
from superset.db_engine_specs.mysql import MySQLEngineSpec
from superset.db_engine_specs.sqlite import SqliteEngineSpec
from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
from superset.sql_parse import ParsedQuery
from superset.utils.database import get_example_database
from tests.integration_tests.db_engine_specs.base_tests import TestDbEngineSpec
from tests.integration_tests.test_app import app
from ..fixtures.birth_names_dashboard import (
load_birth_names_dashboard_with_slices,
load_birth_names_data,
)
from ..fixtures.energy_dashboard import (
load_energy_table_data,
load_energy_table_with_slice,
)
from ..fixtures.pyodbcRow import Row
class TestDbEngineSpecs(TestDbEngineSpec):
def test_extract_limit_from_query(self, engine_spec_class=BaseEngineSpec):
q0 = "select * from table"
q1 = "select * from mytable limit 10"
q2 = "select * from (select * from my_subquery limit 10) where col=1 limit 20"
q3 = "select * from (select * from my_subquery limit 10);"
q4 = "select * from (select * from my_subquery limit 10) where col=1 limit 20;"
q5 = "select * from mytable limit 20, 10"
q6 = "select * from mytable limit 10 offset 20"
q7 = "select * from mytable limit"
q8 = "select * from mytable limit 10.0"
q9 = "select * from mytable limit x"
q10 = "select * from mytable limit 20, x"
q11 = "select * from mytable limit x offset 20"
self.assertEqual(engine_spec_class.get_limit_from_sql(q0), None)
self.assertEqual(engine_spec_class.get_limit_from_sql(q1), 10)
self.assertEqual(engine_spec_class.get_limit_from_sql(q2), 20)
self.assertEqual(engine_spec_class.get_limit_from_sql(q3), None)
self.assertEqual(engine_spec_class.get_limit_from_sql(q4), 20)
self.assertEqual(engine_spec_class.get_limit_from_sql(q5), 10)
self.assertEqual(engine_spec_class.get_limit_from_sql(q6), 10)
self.assertEqual(engine_spec_class.get_limit_from_sql(q7), None)
self.assertEqual(engine_spec_class.get_limit_from_sql(q8), None)
self.assertEqual(engine_spec_class.get_limit_from_sql(q9), None)
self.assertEqual(engine_spec_class.get_limit_from_sql(q10), None)
self.assertEqual(engine_spec_class.get_limit_from_sql(q11), None)
def test_wrapped_semi_tabs(self):
self.sql_limit_regex(
"SELECT * FROM a \t \n ; \t \n ", "SELECT * FROM a\nLIMIT 1000"
)
def test_simple_limit_query(self):
self.sql_limit_regex("SELECT * FROM a", "SELECT * FROM a\nLIMIT 1000")
def test_modify_limit_query(self):
self.sql_limit_regex("SELECT * FROM a LIMIT 9999", "SELECT * FROM a LIMIT 1000")
def test_limit_query_with_limit_subquery(self): # pylint: disable=invalid-name
self.sql_limit_regex(
"SELECT * FROM (SELECT * FROM a LIMIT 10) LIMIT 9999",
"SELECT * FROM (SELECT * FROM a LIMIT 10) LIMIT 1000",
)
def test_limit_query_without_force(self):
self.sql_limit_regex(
"SELECT * FROM a LIMIT 10",
"SELECT * FROM a LIMIT 10",
limit=11,
)
def test_limit_query_with_force(self):
self.sql_limit_regex(
"SELECT * FROM a LIMIT 10",
"SELECT * FROM a LIMIT 11",
limit=11,
force=True,
)
def test_limit_with_expr(self):
self.sql_limit_regex(
"""
SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 99990""",
"""SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 1000""",
)
def test_limit_expr_and_semicolon(self):
self.sql_limit_regex(
"""
SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 99990 ;""",
"""SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 1000""",
)
def test_get_datatype(self):
self.assertEqual("VARCHAR", BaseEngineSpec.get_datatype("VARCHAR"))
def test_limit_with_implicit_offset(self):
self.sql_limit_regex(
"""
SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 99990, 999999""",
"""SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 99990, 1000""",
)
def test_limit_with_explicit_offset(self):
self.sql_limit_regex(
"""
SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 99990
OFFSET 999999""",
"""SELECT
'LIMIT 777' AS a
, b
FROM
table
LIMIT 1000
OFFSET 999999""",
)
def test_limit_with_non_token_limit(self):
self.sql_limit_regex(
"""SELECT 'LIMIT 777'""", """SELECT 'LIMIT 777'\nLIMIT 1000"""
)
def test_limit_with_fetch_many(self):
class DummyEngineSpec(BaseEngineSpec):
limit_method = LimitMethod.FETCH_MANY
self.sql_limit_regex(
"SELECT * FROM table", "SELECT * FROM table", DummyEngineSpec
)
def test_engine_time_grain_validity(self):
time_grains = set(builtin_time_grains.keys())
# loop over all subclasses of BaseEngineSpec
for engine in load_engine_specs():
if engine is not BaseEngineSpec:
# make sure time grain functions have been defined
self.assertGreater(len(engine.get_time_grain_expressions()), 0)
# make sure all defined time grains are supported
defined_grains = {grain.duration for grain in engine.get_time_grains()}
intersection = time_grains.intersection(defined_grains)
self.assertSetEqual(defined_grains, intersection, engine)
def test_get_time_grain_expressions(self):
time_grains = MySQLEngineSpec.get_time_grain_expressions()
self.assertEqual(
list(time_grains.keys()),
[
None,
"PT1S",
"PT1M",
"PT1H",
"P1D",
"P1W",
"P1M",
"P3M",
"P1Y",
"1969-12-29T00:00:00Z/P1W",
],
)
def test_get_table_names(self):
inspector = mock.Mock()
inspector.get_table_names = mock.Mock(return_value=["schema.table", "table_2"])
inspector.get_foreign_table_names = mock.Mock(return_value=["table_3"])
""" Make sure base engine spec removes schema name from table name
ie. when try_remove_schema_from_table_name == True. """
base_result_expected = {"table", "table_2"}
base_result = BaseEngineSpec.get_table_names(
database=mock.ANY, schema="schema", inspector=inspector
)
assert base_result_expected == base_result
@pytest.mark.usefixtures("load_energy_table_with_slice")
def test_column_datatype_to_string(self):
example_db = get_example_database()
sqla_table = example_db.get_table("energy_usage")
dialect = example_db.get_dialect()
# TODO: fix column type conversion for presto.
if example_db.backend == "presto":
return
col_names = [
example_db.db_engine_spec.column_datatype_to_string(c.type, dialect)
for c in sqla_table.columns
]
if example_db.backend == "postgresql":
expected = ["VARCHAR(255)", "VARCHAR(255)", "DOUBLE PRECISION"]
elif example_db.backend == "hive":
expected = ["STRING", "STRING", "FLOAT"]
else:
expected = ["VARCHAR(255)", "VARCHAR(255)", "FLOAT"]
self.assertEqual(col_names, expected)
def test_convert_dttm(self):
dttm = self.get_dttm()
self.assertIsNone(BaseEngineSpec.convert_dttm("", dttm, db_extra=None))
def test_pyodbc_rows_to_tuples(self):
# Test for case when pyodbc.Row is returned (odbc driver)
data = [
Row((1, 1, datetime.datetime(2017, 10, 19, 23, 39, 16, 660000))),
Row((2, 2, datetime.datetime(2018, 10, 19, 23, 39, 16, 660000))),
]
expected = [
(1, 1, datetime.datetime(2017, 10, 19, 23, 39, 16, 660000)),
(2, 2, datetime.datetime(2018, 10, 19, 23, 39, 16, 660000)),
]
result = BaseEngineSpec.pyodbc_rows_to_tuples(data)
self.assertListEqual(result, expected)
def test_pyodbc_rows_to_tuples_passthrough(self):
# Test for case when tuples are returned
data = [
(1, 1, datetime.datetime(2017, 10, 19, 23, 39, 16, 660000)),
(2, 2, datetime.datetime(2018, 10, 19, 23, 39, 16, 660000)),
]
result = BaseEngineSpec.pyodbc_rows_to_tuples(data)
self.assertListEqual(result, data)
@mock.patch("superset.models.core.Database.db_engine_spec", BaseEngineSpec)
@pytest.mark.usefixtures("load_birth_names_dashboard_with_slices")
def test_calculated_column_in_order_by_base_engine_spec(self):
table = self.get_table(name="birth_names")
TableColumn(
column_name="gender_cc",
type="VARCHAR(255)",
table=table,
expression="""
case
when gender='boy' then 'male'
else 'female'
end
""",
)
table.database.sqlalchemy_uri = "sqlite://"
query_obj = {
"groupby": ["gender_cc"],
"is_timeseries": False,
"filter": [],
"orderby": [["gender_cc", True]],
}
sql = table.get_query_str(query_obj)
assert (
"""ORDER BY case
when gender='boy' then 'male'
else 'female'
end ASC;"""
in sql
)
def test_is_readonly():
def is_readonly(sql: str) -> bool:
return BaseEngineSpec.is_readonly_query(ParsedQuery(sql))
assert is_readonly("SHOW LOCKS test EXTENDED")
assert not is_readonly("SET hivevar:desc='Legislators'")
assert not is_readonly("UPDATE t1 SET col1 = NULL")
assert is_readonly("EXPLAIN SELECT 1")
assert is_readonly("SELECT 1")
assert is_readonly("WITH (SELECT 1) bla SELECT * from bla")
assert is_readonly("SHOW CATALOGS")
assert is_readonly("SHOW TABLES")
def test_time_grain_denylist():
config = app.config.copy()
app.config["TIME_GRAIN_DENYLIST"] = ["PT1M", "SQLITE_NONEXISTENT_GRAIN"]
with app.app_context():
time_grain_functions = SqliteEngineSpec.get_time_grain_expressions()
assert not "PT1M" in time_grain_functions
assert not "SQLITE_NONEXISTENT_GRAIN" in time_grain_functions
app.config = config
def test_time_grain_addons():
config = app.config.copy()
app.config["TIME_GRAIN_ADDONS"] = {"PTXM": "x seconds"}
app.config["TIME_GRAIN_ADDON_EXPRESSIONS"] = {"sqlite": {"PTXM": "ABC({col})"}}
with app.app_context():
time_grains = SqliteEngineSpec.get_time_grains()
time_grain_addon = time_grains[-1]
assert "PTXM" == time_grain_addon.duration
assert "x seconds" == time_grain_addon.label
app.config = config
def test_get_time_grain_with_config():
"""Should concatenate from configs and then sort in the proper order"""
config = app.config.copy()
app.config["TIME_GRAIN_ADDON_EXPRESSIONS"] = {
"mysql": {
"PT2H": "foo",
"PT4H": "foo",
"PT6H": "foo",
"PT8H": "foo",
"PT10H": "foo",
"PT12H": "foo",
"PT1S": "foo",
}
}
with app.app_context():
time_grains = MySQLEngineSpec.get_time_grain_expressions()
assert set(time_grains.keys()) == {
None,
"PT1S",
"PT1M",
"PT1H",
"PT2H",
"PT4H",
"PT6H",
"PT8H",
"PT10H",
"PT12H",
"P1D",
"P1W",
"P1M",
"P3M",
"P1Y",
"1969-12-29T00:00:00Z/P1W",
}
app.config = config
def test_get_time_grain_with_unknown_values():
"""Should concatenate from configs and then sort in the proper order
putting unknown patterns at the end"""
config = app.config.copy()
app.config["TIME_GRAIN_ADDON_EXPRESSIONS"] = {
"mysql": {
"PT2H": "foo",
"weird": "foo",
"PT12H": "foo",
}
}
with app.app_context():
time_grains = MySQLEngineSpec.get_time_grain_expressions()
assert list(time_grains)[-1] == "weird"
app.config = config
@mock.patch("superset.db_engine_specs.base.is_hostname_valid")
@mock.patch("superset.db_engine_specs.base.is_port_open")
def test_validate(is_port_open, is_hostname_valid):
is_hostname_valid.return_value = True
is_port_open.return_value = True
properties = {
"parameters": {
"host": "localhost",
"port": 5432,
"username": "username",
"password": "password",
"database": "dbname",
"query": {"sslmode": "verify-full"},
}
}
errors = BasicParametersMixin.validate_parameters(properties)
assert errors == []
def test_validate_parameters_missing():
properties = {
"parameters": {
"host": "",
"port": None,
"username": "",
"password": "",
"database": "",
"query": {},
}
}
with app.app_context():
errors = BasicParametersMixin.validate_parameters(properties)
assert errors == [
SupersetError(
message=(
"One or more parameters are missing: "
"database, host, port, username"
),
error_type=SupersetErrorType.CONNECTION_MISSING_PARAMETERS_ERROR,
level=ErrorLevel.WARNING,
extra={"missing": ["database", "host", "port", "username"]},
),
]
@mock.patch("superset.db_engine_specs.base.is_hostname_valid")
def test_validate_parameters_invalid_host(is_hostname_valid):
is_hostname_valid.return_value = False
properties = {
"parameters": {
"host": "localhost",
"port": None,
"username": "username",
"password": "password",
"database": "dbname",
"query": {"sslmode": "verify-full"},
}
}
with app.app_context():
errors = BasicParametersMixin.validate_parameters(properties)
assert errors == [
SupersetError(
message="One or more parameters are missing: port",
error_type=SupersetErrorType.CONNECTION_MISSING_PARAMETERS_ERROR,
level=ErrorLevel.WARNING,
extra={"missing": ["port"]},
),
SupersetError(
message="The hostname provided can't be resolved.",
error_type=SupersetErrorType.CONNECTION_INVALID_HOSTNAME_ERROR,
level=ErrorLevel.ERROR,
extra={"invalid": ["host"]},
),
]
@mock.patch("superset.db_engine_specs.base.is_hostname_valid")
@mock.patch("superset.db_engine_specs.base.is_port_open")
def test_validate_parameters_port_closed(is_port_open, is_hostname_valid):
is_hostname_valid.return_value = True
is_port_open.return_value = False
properties = {
"parameters": {
"host": "localhost",
"port": 5432,
"username": "username",
"password": "password",
"database": "dbname",
"query": {"sslmode": "verify-full"},
}
}
with app.app_context():
errors = BasicParametersMixin.validate_parameters(properties)
assert errors == [
SupersetError(
message="The port is closed.",
error_type=SupersetErrorType.CONNECTION_PORT_CLOSED_ERROR,
level=ErrorLevel.ERROR,
extra={
"invalid": ["port"],
"issue_codes": [
{"code": 1008, "message": "Issue 1008 - The port is closed."}
],
},
)
]