ZpenrMessangerProject/venv/lib/python3.12/site-packages/sqlalchemy/dialects/mysql/mariadb.py

# dialects/mysql/mariadb.py
# Copyright (C) 2005-2025 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php

from __future__ import annotations

from typing import Any
from typing import Callable

from .base import MariaDBIdentifierPreparer
from .base import MySQLDialect
from .base import MySQLIdentifierPreparer
from .base import MySQLTypeCompiler
from ...sql import sqltypes


class INET4(sqltypes.TypeEngine[str]):
    """INET4 column type for MariaDB

    .. versionadded:: 2.0.37
    """

    __visit_name__ = "INET4"


class INET6(sqltypes.TypeEngine[str]):
    """INET6 column type for MariaDB

    .. versionadded:: 2.0.37
    """

    __visit_name__ = "INET6"


class MariaDBTypeCompiler(MySQLTypeCompiler):
    def visit_INET4(self, type_: INET4, **kwargs: Any) -> str:
        return "INET4"

    def visit_INET6(self, type_: INET6, **kwargs: Any) -> str:
        return "INET6"


class MariaDBDialect(MySQLDialect):
    is_mariadb = True
    supports_statement_cache = True
    name = "mariadb"
    preparer: type[MySQLIdentifierPreparer] = MariaDBIdentifierPreparer
    type_compiler_cls = MariaDBTypeCompiler


def loader(driver: str) -> Callable[[], type[MariaDBDialect]]:
    dialect_mod = __import__(
        "sqlalchemy.dialects.mysql.%s" % driver
    ).dialects.mysql

    driver_mod = getattr(dialect_mod, driver)
    if hasattr(driver_mod, "mariadb_dialect"):
        driver_cls = driver_mod.mariadb_dialect
        return driver_cls  # type: ignore[no-any-return]
    else:
        driver_cls = driver_mod.dialect

        return type(
            "MariaDBDialect_%s" % driver,
            (
                MariaDBDialect,
                driver_cls,
            ),
            {"supports_statement_cache": True},
        )