Remove mysql/maria support

synapse/storage/engines/__init__.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .maria import MariaEngine
 from .postgres import PostgresEngine
 from .sqlite3 import Sqlite3Engine
 
@@ -22,7 +21,6 @@ import importlib
 
 SUPPORTED_MODULE = {
     "sqlite3": Sqlite3Engine,
-    "mysql.connector": MariaEngine,
     "psycopg2": PostgresEngine,
 }
 

synapse/storage/engines/maria.py

@@ -1,50 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright 2015 OpenMarket Ltd
-#
-# Licensed 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.
-
-from synapse.storage import prepare_database
-
-import types
-
-
-class MariaEngine(object):
-    def __init__(self, database_module):
-        self.module = database_module
-
-    def convert_param_style(self, sql):
-        return sql.replace("?", "%s")
-
-    def encode_parameter(self, param):
-        if isinstance(param, types.BufferType):
-            return bytes(param)
-        return param
-
-    def on_new_connection(self, db_conn):
-        pass
-
-    def prepare_database(self, db_conn):
-        cur = db_conn.cursor()
-        cur.execute(
-            "ALTER DATABASE CHARACTER SET utf8mb4 COLLATE utf8mb4_bin"
-        )
-        db_conn.commit()
-        prepare_database(db_conn, self)
-
-    def is_deadlock(self, error):
-        if isinstance(error, self.module.DatabaseError):
-            return error.sqlstate == "40001" and error.errno == 1213
-        return False
-
-    def load_unicode(self, v):
-        return bytes(v).decode("UTF8")