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# dialects/__init__.py
# Copyright (C) 2005-2020 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
__all__ = (
"firebird",
"mssql",
"mysql",
"oracle",
"postgresql",
"sqlite",
"sybase",
)
from .. import util
_translates = {"postgres": "postgresql"}
def _auto_fn(name):
"""default dialect importer.
plugs into the :class:`.PluginLoader`
as a first-hit system.
"""
if "." in name:
dialect, driver = name.split(".")
else:
dialect = name
driver = "base"
if dialect in _translates:
translated = _translates[dialect]
util.warn_deprecated(
"The '%s' dialect name has been "
"renamed to '%s'" % (dialect, translated)
)
dialect = translated
try:
if dialect == "firebird":
try:
module = __import__("sqlalchemy_firebird")
except ImportError:
module = __import__("sqlalchemy.dialects.firebird").dialects
module = getattr(module, dialect)
elif dialect == "sybase":
try:
module = __import__("sqlalchemy_sybase")
except ImportError:
module = __import__("sqlalchemy.dialects.sybase").dialects
module = getattr(module, dialect)
else:
module = __import__("sqlalchemy.dialects.%s" % (dialect,)).dialects
module = getattr(module, dialect)
except ImportError:
return None
if hasattr(module, driver):
module = getattr(module, driver)
return lambda: module.dialect
else:
return None
registry = util.PluginLoader("sqlalchemy.dialects", auto_fn=_auto_fn)
plugins = util.PluginLoader("sqlalchemy.plugins")