# dialects/__init__.py # Copyright (C) 2005-2021 the SQLAlchemy authors and contributors # # # 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")