Update 2025-04-24_11:44:19
This commit is contained in:
oib
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# testing/suite/test_dialect.py
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# Copyright (C) 2005-2025 the SQLAlchemy authors and contributors
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# <see AUTHORS file>
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#
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# This module is part of SQLAlchemy and is released under
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# the MIT License: https://www.opensource.org/licenses/mit-license.php
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# mypy: ignore-errors
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import importlib
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from . import testing
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from .. import assert_raises
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from .. import config
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from .. import engines
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from .. import eq_
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from .. import fixtures
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from .. import is_not_none
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from .. import is_true
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from .. import ne_
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from .. import provide_metadata
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from ..assertions import expect_raises
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from ..assertions import expect_raises_message
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from ..config import requirements
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from ..provision import set_default_schema_on_connection
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from ..schema import Column
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from ..schema import Table
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from ... import bindparam
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from ... import dialects
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from ... import event
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from ... import exc
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from ... import Integer
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from ... import literal_column
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from ... import select
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from ... import String
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from ...sql.compiler import Compiled
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from ...util import inspect_getfullargspec
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class PingTest(fixtures.TestBase):
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__backend__ = True
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def test_do_ping(self):
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with testing.db.connect() as conn:
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is_true(
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testing.db.dialect.do_ping(conn.connection.dbapi_connection)
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)
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class ArgSignatureTest(fixtures.TestBase):
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"""test that all visit_XYZ() in :class:`_sql.Compiler` subclasses have
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``**kw``, for #8988.
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This test uses runtime code inspection. Does not need to be a
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``__backend__`` test as it only needs to run once provided all target
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dialects have been imported.
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For third party dialects, the suite would be run with that third
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party as a "--dburi", which means its compiler classes will have been
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imported by the time this test runs.
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"""
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def _all_subclasses(): # type: ignore # noqa
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for d in dialects.__all__:
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if not d.startswith("_"):
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importlib.import_module("sqlalchemy.dialects.%s" % d)
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stack = [Compiled]
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while stack:
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cls = stack.pop(0)
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stack.extend(cls.__subclasses__())
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yield cls
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@testing.fixture(params=list(_all_subclasses()))
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def all_subclasses(self, request):
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yield request.param
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def test_all_visit_methods_accept_kw(self, all_subclasses):
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cls = all_subclasses
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for k in cls.__dict__:
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if k.startswith("visit_"):
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meth = getattr(cls, k)
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insp = inspect_getfullargspec(meth)
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is_not_none(
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insp.varkw,
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f"Compiler visit method {cls.__name__}.{k}() does "
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"not accommodate for **kw in its argument signature",
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)
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class ExceptionTest(fixtures.TablesTest):
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"""Test basic exception wrapping.
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DBAPIs vary a lot in exception behavior so to actually anticipate
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specific exceptions from real round trips, we need to be conservative.
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"""
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run_deletes = "each"
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__backend__ = True
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@classmethod
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def define_tables(cls, metadata):
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Table(
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"manual_pk",
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metadata,
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Column("id", Integer, primary_key=True, autoincrement=False),
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Column("data", String(50)),
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)
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@requirements.duplicate_key_raises_integrity_error
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def test_integrity_error(self):
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with config.db.connect() as conn:
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trans = conn.begin()
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conn.execute(
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self.tables.manual_pk.insert(), {"id": 1, "data": "d1"}
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)
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assert_raises(
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exc.IntegrityError,
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conn.execute,
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self.tables.manual_pk.insert(),
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{"id": 1, "data": "d1"},
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)
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trans.rollback()
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def test_exception_with_non_ascii(self):
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with config.db.connect() as conn:
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try:
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# try to create an error message that likely has non-ascii
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# characters in the DBAPI's message string. unfortunately
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# there's no way to make this happen with some drivers like
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# mysqlclient, pymysql. this at least does produce a non-
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# ascii error message for cx_oracle, psycopg2
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conn.execute(select(literal_column("méil")))
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assert False
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except exc.DBAPIError as err:
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err_str = str(err)
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assert str(err.orig) in str(err)
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assert isinstance(err_str, str)
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class IsolationLevelTest(fixtures.TestBase):
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__backend__ = True
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__requires__ = ("isolation_level",)
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def _get_non_default_isolation_level(self):
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levels = requirements.get_isolation_levels(config)
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default = levels["default"]
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supported = levels["supported"]
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s = set(supported).difference(["AUTOCOMMIT", default])
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if s:
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return s.pop()
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else:
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config.skip_test("no non-default isolation level available")
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def test_default_isolation_level(self):
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eq_(
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config.db.dialect.default_isolation_level,
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requirements.get_isolation_levels(config)["default"],
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)
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def test_non_default_isolation_level(self):
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non_default = self._get_non_default_isolation_level()
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with config.db.connect() as conn:
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existing = conn.get_isolation_level()
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ne_(existing, non_default)
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conn.execution_options(isolation_level=non_default)
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eq_(conn.get_isolation_level(), non_default)
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conn.dialect.reset_isolation_level(
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conn.connection.dbapi_connection
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)
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eq_(conn.get_isolation_level(), existing)
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def test_all_levels(self):
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levels = requirements.get_isolation_levels(config)
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all_levels = levels["supported"]
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for level in set(all_levels).difference(["AUTOCOMMIT"]):
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with config.db.connect() as conn:
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conn.execution_options(isolation_level=level)
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eq_(conn.get_isolation_level(), level)
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trans = conn.begin()
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trans.rollback()
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eq_(conn.get_isolation_level(), level)
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with config.db.connect() as conn:
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eq_(
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conn.get_isolation_level(),
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levels["default"],
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)
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@testing.requires.get_isolation_level_values
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def test_invalid_level_execution_option(self, connection_no_trans):
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"""test for the new get_isolation_level_values() method"""
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connection = connection_no_trans
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with expect_raises_message(
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exc.ArgumentError,
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"Invalid value '%s' for isolation_level. "
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"Valid isolation levels for '%s' are %s"
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% (
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"FOO",
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connection.dialect.name,
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", ".join(
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requirements.get_isolation_levels(config)["supported"]
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),
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),
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):
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connection.execution_options(isolation_level="FOO")
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@testing.requires.get_isolation_level_values
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@testing.requires.dialect_level_isolation_level_param
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def test_invalid_level_engine_param(self, testing_engine):
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"""test for the new get_isolation_level_values() method
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and support for the dialect-level 'isolation_level' parameter.
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"""
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eng = testing_engine(options=dict(isolation_level="FOO"))
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with expect_raises_message(
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exc.ArgumentError,
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"Invalid value '%s' for isolation_level. "
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"Valid isolation levels for '%s' are %s"
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% (
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"FOO",
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eng.dialect.name,
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", ".join(
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requirements.get_isolation_levels(config)["supported"]
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),
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),
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):
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eng.connect()
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@testing.requires.independent_readonly_connections
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def test_dialect_user_setting_is_restored(self, testing_engine):
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levels = requirements.get_isolation_levels(config)
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default = levels["default"]
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supported = (
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sorted(
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set(levels["supported"]).difference([default, "AUTOCOMMIT"])
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)
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)[0]
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e = testing_engine(options={"isolation_level": supported})
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with e.connect() as conn:
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eq_(conn.get_isolation_level(), supported)
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with e.connect() as conn:
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conn.execution_options(isolation_level=default)
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eq_(conn.get_isolation_level(), default)
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with e.connect() as conn:
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eq_(conn.get_isolation_level(), supported)
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class AutocommitIsolationTest(fixtures.TablesTest):
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run_deletes = "each"
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__requires__ = ("autocommit",)
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__backend__ = True
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@classmethod
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def define_tables(cls, metadata):
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Table(
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"some_table",
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metadata,
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Column("id", Integer, primary_key=True, autoincrement=False),
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Column("data", String(50)),
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test_needs_acid=True,
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)
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def _test_conn_autocommits(self, conn, autocommit):
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trans = conn.begin()
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conn.execute(
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self.tables.some_table.insert(), {"id": 1, "data": "some data"}
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)
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trans.rollback()
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eq_(
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conn.scalar(select(self.tables.some_table.c.id)),
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1 if autocommit else None,
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)
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conn.rollback()
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with conn.begin():
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conn.execute(self.tables.some_table.delete())
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def test_autocommit_on(self, connection_no_trans):
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conn = connection_no_trans
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c2 = conn.execution_options(isolation_level="AUTOCOMMIT")
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self._test_conn_autocommits(c2, True)
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c2.dialect.reset_isolation_level(c2.connection.dbapi_connection)
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self._test_conn_autocommits(conn, False)
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def test_autocommit_off(self, connection_no_trans):
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conn = connection_no_trans
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self._test_conn_autocommits(conn, False)
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def test_turn_autocommit_off_via_default_iso_level(
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self, connection_no_trans
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):
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conn = connection_no_trans
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conn = conn.execution_options(isolation_level="AUTOCOMMIT")
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self._test_conn_autocommits(conn, True)
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conn.execution_options(
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isolation_level=requirements.get_isolation_levels(config)[
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"default"
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]
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)
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self._test_conn_autocommits(conn, False)
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@testing.requires.independent_readonly_connections
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@testing.variation("use_dialect_setting", [True, False])
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def test_dialect_autocommit_is_restored(
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self, testing_engine, use_dialect_setting
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):
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"""test #10147"""
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if use_dialect_setting:
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e = testing_engine(options={"isolation_level": "AUTOCOMMIT"})
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else:
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e = testing_engine().execution_options(
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isolation_level="AUTOCOMMIT"
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)
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levels = requirements.get_isolation_levels(config)
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default = levels["default"]
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with e.connect() as conn:
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self._test_conn_autocommits(conn, True)
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with e.connect() as conn:
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conn.execution_options(isolation_level=default)
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self._test_conn_autocommits(conn, False)
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with e.connect() as conn:
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self._test_conn_autocommits(conn, True)
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class EscapingTest(fixtures.TestBase):
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@provide_metadata
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def test_percent_sign_round_trip(self):
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"""test that the DBAPI accommodates for escaped / nonescaped
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percent signs in a way that matches the compiler
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"""
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m = self.metadata
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t = Table("t", m, Column("data", String(50)))
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t.create(config.db)
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with config.db.begin() as conn:
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conn.execute(t.insert(), dict(data="some % value"))
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conn.execute(t.insert(), dict(data="some %% other value"))
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eq_(
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conn.scalar(
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select(t.c.data).where(
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t.c.data == literal_column("'some % value'")
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)
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),
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"some % value",
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)
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eq_(
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conn.scalar(
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select(t.c.data).where(
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t.c.data == literal_column("'some %% other value'")
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)
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),
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"some %% other value",
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)
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class WeCanSetDefaultSchemaWEventsTest(fixtures.TestBase):
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__backend__ = True
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__requires__ = ("default_schema_name_switch",)
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def test_control_case(self):
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default_schema_name = config.db.dialect.default_schema_name
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eng = engines.testing_engine()
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with eng.connect():
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pass
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eq_(eng.dialect.default_schema_name, default_schema_name)
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def test_wont_work_wo_insert(self):
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default_schema_name = config.db.dialect.default_schema_name
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eng = engines.testing_engine()
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@event.listens_for(eng, "connect")
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def on_connect(dbapi_connection, connection_record):
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set_default_schema_on_connection(
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config, dbapi_connection, config.test_schema
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)
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with eng.connect() as conn:
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what_it_should_be = eng.dialect._get_default_schema_name(conn)
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eq_(what_it_should_be, config.test_schema)
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eq_(eng.dialect.default_schema_name, default_schema_name)
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def test_schema_change_on_connect(self):
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eng = engines.testing_engine()
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@event.listens_for(eng, "connect", insert=True)
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def on_connect(dbapi_connection, connection_record):
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set_default_schema_on_connection(
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config, dbapi_connection, config.test_schema
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||||
)
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with eng.connect() as conn:
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what_it_should_be = eng.dialect._get_default_schema_name(conn)
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eq_(what_it_should_be, config.test_schema)
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eq_(eng.dialect.default_schema_name, config.test_schema)
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def test_schema_change_works_w_transactions(self):
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||||
eng = engines.testing_engine()
|
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|
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@event.listens_for(eng, "connect", insert=True)
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||||
def on_connect(dbapi_connection, *arg):
|
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set_default_schema_on_connection(
|
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config, dbapi_connection, config.test_schema
|
||||
)
|
||||
|
||||
with eng.connect() as conn:
|
||||
trans = conn.begin()
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what_it_should_be = eng.dialect._get_default_schema_name(conn)
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eq_(what_it_should_be, config.test_schema)
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trans.rollback()
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what_it_should_be = eng.dialect._get_default_schema_name(conn)
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eq_(what_it_should_be, config.test_schema)
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eq_(eng.dialect.default_schema_name, config.test_schema)
|
||||
|
||||
|
||||
class FutureWeCanSetDefaultSchemaWEventsTest(
|
||||
fixtures.FutureEngineMixin, WeCanSetDefaultSchemaWEventsTest
|
||||
):
|
||||
pass
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||||
|
||||
|
||||
class DifficultParametersTest(fixtures.TestBase):
|
||||
__backend__ = True
|
||||
|
||||
tough_parameters = testing.combinations(
|
||||
("boring",),
|
||||
("per cent",),
|
||||
("per % cent",),
|
||||
("%percent",),
|
||||
("par(ens)",),
|
||||
("percent%(ens)yah",),
|
||||
("col:ons",),
|
||||
("_starts_with_underscore",),
|
||||
("dot.s",),
|
||||
("more :: %colons%",),
|
||||
("_name",),
|
||||
("___name",),
|
||||
("[BracketsAndCase]",),
|
||||
("42numbers",),
|
||||
("percent%signs",),
|
||||
("has spaces",),
|
||||
("/slashes/",),
|
||||
("more/slashes",),
|
||||
("q?marks",),
|
||||
("1param",),
|
||||
("1col:on",),
|
||||
argnames="paramname",
|
||||
)
|
||||
|
||||
@tough_parameters
|
||||
@config.requirements.unusual_column_name_characters
|
||||
def test_round_trip_same_named_column(
|
||||
self, paramname, connection, metadata
|
||||
):
|
||||
name = paramname
|
||||
|
||||
t = Table(
|
||||
"t",
|
||||
metadata,
|
||||
Column("id", Integer, primary_key=True),
|
||||
Column(name, String(50), nullable=False),
|
||||
)
|
||||
|
||||
# table is created
|
||||
t.create(connection)
|
||||
|
||||
# automatic param generated by insert
|
||||
connection.execute(t.insert().values({"id": 1, name: "some name"}))
|
||||
|
||||
# automatic param generated by criteria, plus selecting the column
|
||||
stmt = select(t.c[name]).where(t.c[name] == "some name")
|
||||
|
||||
eq_(connection.scalar(stmt), "some name")
|
||||
|
||||
# use the name in a param explicitly
|
||||
stmt = select(t.c[name]).where(t.c[name] == bindparam(name))
|
||||
|
||||
row = connection.execute(stmt, {name: "some name"}).first()
|
||||
|
||||
# name works as the key from cursor.description
|
||||
eq_(row._mapping[name], "some name")
|
||||
|
||||
# use expanding IN
|
||||
stmt = select(t.c[name]).where(
|
||||
t.c[name].in_(["some name", "some other_name"])
|
||||
)
|
||||
|
||||
row = connection.execute(stmt).first()
|
||||
|
||||
@testing.fixture
|
||||
def multirow_fixture(self, metadata, connection):
|
||||
mytable = Table(
|
||||
"mytable",
|
||||
metadata,
|
||||
Column("myid", Integer),
|
||||
Column("name", String(50)),
|
||||
Column("desc", String(50)),
|
||||
)
|
||||
|
||||
mytable.create(connection)
|
||||
|
||||
connection.execute(
|
||||
mytable.insert(),
|
||||
[
|
||||
{"myid": 1, "name": "a", "desc": "a_desc"},
|
||||
{"myid": 2, "name": "b", "desc": "b_desc"},
|
||||
{"myid": 3, "name": "c", "desc": "c_desc"},
|
||||
{"myid": 4, "name": "d", "desc": "d_desc"},
|
||||
],
|
||||
)
|
||||
yield mytable
|
||||
|
||||
@tough_parameters
|
||||
def test_standalone_bindparam_escape(
|
||||
self, paramname, connection, multirow_fixture
|
||||
):
|
||||
tbl1 = multirow_fixture
|
||||
stmt = select(tbl1.c.myid).where(
|
||||
tbl1.c.name == bindparam(paramname, value="x")
|
||||
)
|
||||
res = connection.scalar(stmt, {paramname: "c"})
|
||||
eq_(res, 3)
|
||||
|
||||
@tough_parameters
|
||||
def test_standalone_bindparam_escape_expanding(
|
||||
self, paramname, connection, multirow_fixture
|
||||
):
|
||||
tbl1 = multirow_fixture
|
||||
stmt = (
|
||||
select(tbl1.c.myid)
|
||||
.where(tbl1.c.name.in_(bindparam(paramname, value=["a", "b"])))
|
||||
.order_by(tbl1.c.myid)
|
||||
)
|
||||
|
||||
res = connection.scalars(stmt, {paramname: ["d", "a"]}).all()
|
||||
eq_(res, [1, 4])
|
||||
|
||||
|
||||
class ReturningGuardsTest(fixtures.TablesTest):
|
||||
"""test that the various 'returning' flags are set appropriately"""
|
||||
|
||||
__backend__ = True
|
||||
|
||||
@classmethod
|
||||
def define_tables(cls, metadata):
|
||||
Table(
|
||||
"t",
|
||||
metadata,
|
||||
Column("id", Integer, primary_key=True, autoincrement=False),
|
||||
Column("data", String(50)),
|
||||
)
|
||||
|
||||
@testing.fixture
|
||||
def run_stmt(self, connection):
|
||||
t = self.tables.t
|
||||
|
||||
def go(stmt, executemany, id_param_name, expect_success):
|
||||
stmt = stmt.returning(t.c.id)
|
||||
|
||||
if executemany:
|
||||
if not expect_success:
|
||||
# for RETURNING executemany(), we raise our own
|
||||
# error as this is independent of general RETURNING
|
||||
# support
|
||||
with expect_raises_message(
|
||||
exc.StatementError,
|
||||
rf"Dialect {connection.dialect.name}\+"
|
||||
f"{connection.dialect.driver} with "
|
||||
f"current server capabilities does not support "
|
||||
f".*RETURNING when executemany is used",
|
||||
):
|
||||
result = connection.execute(
|
||||
stmt,
|
||||
[
|
||||
{id_param_name: 1, "data": "d1"},
|
||||
{id_param_name: 2, "data": "d2"},
|
||||
{id_param_name: 3, "data": "d3"},
|
||||
],
|
||||
)
|
||||
else:
|
||||
result = connection.execute(
|
||||
stmt,
|
||||
[
|
||||
{id_param_name: 1, "data": "d1"},
|
||||
{id_param_name: 2, "data": "d2"},
|
||||
{id_param_name: 3, "data": "d3"},
|
||||
],
|
||||
)
|
||||
eq_(result.all(), [(1,), (2,), (3,)])
|
||||
else:
|
||||
if not expect_success:
|
||||
# for RETURNING execute(), we pass all the way to the DB
|
||||
# and let it fail
|
||||
with expect_raises(exc.DBAPIError):
|
||||
connection.execute(
|
||||
stmt, {id_param_name: 1, "data": "d1"}
|
||||
)
|
||||
else:
|
||||
result = connection.execute(
|
||||
stmt, {id_param_name: 1, "data": "d1"}
|
||||
)
|
||||
eq_(result.all(), [(1,)])
|
||||
|
||||
return go
|
||||
|
||||
def test_insert_single(self, connection, run_stmt):
|
||||
t = self.tables.t
|
||||
|
||||
stmt = t.insert()
|
||||
|
||||
run_stmt(stmt, False, "id", connection.dialect.insert_returning)
|
||||
|
||||
def test_insert_many(self, connection, run_stmt):
|
||||
t = self.tables.t
|
||||
|
||||
stmt = t.insert()
|
||||
|
||||
run_stmt(
|
||||
stmt, True, "id", connection.dialect.insert_executemany_returning
|
||||
)
|
||||
|
||||
def test_update_single(self, connection, run_stmt):
|
||||
t = self.tables.t
|
||||
|
||||
connection.execute(
|
||||
t.insert(),
|
||||
[
|
||||
{"id": 1, "data": "d1"},
|
||||
{"id": 2, "data": "d2"},
|
||||
{"id": 3, "data": "d3"},
|
||||
],
|
||||
)
|
||||
|
||||
stmt = t.update().where(t.c.id == bindparam("b_id"))
|
||||
|
||||
run_stmt(stmt, False, "b_id", connection.dialect.update_returning)
|
||||
|
||||
def test_update_many(self, connection, run_stmt):
|
||||
t = self.tables.t
|
||||
|
||||
connection.execute(
|
||||
t.insert(),
|
||||
[
|
||||
{"id": 1, "data": "d1"},
|
||||
{"id": 2, "data": "d2"},
|
||||
{"id": 3, "data": "d3"},
|
||||
],
|
||||
)
|
||||
|
||||
stmt = t.update().where(t.c.id == bindparam("b_id"))
|
||||
|
||||
run_stmt(
|
||||
stmt, True, "b_id", connection.dialect.update_executemany_returning
|
||||
)
|
||||
|
||||
def test_delete_single(self, connection, run_stmt):
|
||||
t = self.tables.t
|
||||
|
||||
connection.execute(
|
||||
t.insert(),
|
||||
[
|
||||
{"id": 1, "data": "d1"},
|
||||
{"id": 2, "data": "d2"},
|
||||
{"id": 3, "data": "d3"},
|
||||
],
|
||||
)
|
||||
|
||||
stmt = t.delete().where(t.c.id == bindparam("b_id"))
|
||||
|
||||
run_stmt(stmt, False, "b_id", connection.dialect.delete_returning)
|
||||
|
||||
def test_delete_many(self, connection, run_stmt):
|
||||
t = self.tables.t
|
||||
|
||||
connection.execute(
|
||||
t.insert(),
|
||||
[
|
||||
{"id": 1, "data": "d1"},
|
||||
{"id": 2, "data": "d2"},
|
||||
{"id": 3, "data": "d3"},
|
||||
],
|
||||
)
|
||||
|
||||
stmt = t.delete().where(t.c.id == bindparam("b_id"))
|
||||
|
||||
run_stmt(
|
||||
stmt, True, "b_id", connection.dialect.delete_executemany_returning
|
||||
)
|
||||
Reference in New Issue
Block a user