Revert "Don't propgate DB config upwards"

This reverts commit c8f1458.

synapse/storage/engines/_base.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 import abc
 from enum import IntEnum
-from typing import TYPE_CHECKING, Generic, Optional, TypeVar
+from typing import TYPE_CHECKING, Any, Generic, Mapping, Optional, TypeVar
 
 from synapse.storage.types import Connection, Cursor, DBAPI2Module
 
@@ -35,7 +35,7 @@ class IncorrectDatabaseSetup(RuntimeError):
 
 
 class BaseDatabaseEngine(Generic[ConnectionType], metaclass=abc.ABCMeta):
-    def __init__(self, module: DBAPI2Module):
+    def __init__(self, module: DBAPI2Module, config: Mapping[str, Any]):
         self.module = module
 
     @property

synapse/storage/engines/postgres.py

@@ -35,7 +35,7 @@ class PostgresEngine(BaseDatabaseEngine["psycopg2.connection"]):
     def __init__(self, database_config: Mapping[str, Any]):
         import psycopg2.extensions
 
-        super().__init__(psycopg2)
+        super().__init__(psycopg2, database_config)
         psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
 
         # Disables passing `bytes` to txn.execute, c.f. #6186. If you do

synapse/storage/engines/sqlite.py

@@ -26,7 +26,7 @@
 
 class Sqlite3Engine(BaseDatabaseEngine[sqlite3.Connection]):
     def __init__(self, database_config: Mapping[str, Any]):
-        super().__init__(sqlite3)
+        super().__init__(sqlite3, database_config)
 
         database = database_config.get("args", {}).get("database")
         self._is_in_memory = database in (