Snapshot schema 72 (#13873)

Including another batch of fixes to the schema dump script

synapse/storage/engines/_base.py

@@ -32,9 +32,10 @@ class IncorrectDatabaseSetup(RuntimeError):
 
 
 ConnectionType = TypeVar("ConnectionType", bound=Connection)
+CursorType = TypeVar("CursorType", bound=Cursor)
 
 
-class BaseDatabaseEngine(Generic[ConnectionType], metaclass=abc.ABCMeta):
+class BaseDatabaseEngine(Generic[ConnectionType, CursorType], metaclass=abc.ABCMeta):
     def __init__(self, module: DBAPI2Module, config: Mapping[str, Any]):
         self.module = module
 
@@ -64,7 +65,7 @@ class BaseDatabaseEngine(Generic[ConnectionType], metaclass=abc.ABCMeta):
         ...
 
     @abc.abstractmethod
-    def check_new_database(self, txn: Cursor) -> None:
+    def check_new_database(self, txn: CursorType) -> None:
         """Gets called when setting up a brand new database. This allows us to
         apply stricter checks on new databases versus existing database.
         """
@@ -124,3 +125,21 @@ class BaseDatabaseEngine(Generic[ConnectionType], metaclass=abc.ABCMeta):
         Note: This has no effect on SQLite3, as transactions are SERIALIZABLE by default.
         """
         ...
+
+    @staticmethod
+    @abc.abstractmethod
+    def executescript(cursor: CursorType, script: str) -> None:
+        """Execute a chunk of SQL containing multiple semicolon-delimited statements.
+
+        This is not provided by DBAPI2, and so needs engine-specific support.
+        """
+        ...
+
+    @classmethod
+    def execute_script_file(cls, cursor: CursorType, filepath: str) -> None:
+        """Execute a file containing multiple semicolon-delimited SQL statements.
+
+        This is not provided by DBAPI2, and so needs engine-specific support.
+        """
+        with open(filepath, "rt") as f:
+            cls.executescript(cursor, f.read())