1 files changed, 11 insertions, 1 deletions
diff --git a/synapse/storage/engines/postgres.py b/synapse/storage/engines/postgres.py
index 7f7d006ac2..d8c0f64d9a 100644
--- a/synapse/storage/engines/postgres.py
+++ b/synapse/storage/engines/postgres.py
@@ -31,7 +31,9 @@ if TYPE_CHECKING:
 logger = logging.getLogger(__name__)
 
 
-class PostgresEngine(BaseDatabaseEngine[psycopg2.extensions.connection]):
+class PostgresEngine(
+    BaseDatabaseEngine[psycopg2.extensions.connection, psycopg2.extensions.cursor]
+):
     def __init__(self, database_config: Mapping[str, Any]):
         super().__init__(psycopg2, database_config)
         psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
@@ -212,3 +214,11 @@ class PostgresEngine(BaseDatabaseEngine[psycopg2.extensions.connection]):
         else:
             isolation_level = self.isolation_level_map[isolation_level]
         return conn.set_isolation_level(isolation_level)
+
+    @staticmethod
+    def executescript(cursor: psycopg2.extensions.cursor, script: str) -> None:
+        """Execute a chunk of SQL containing multiple semicolon-delimited statements.
+
+        Psycopg2 seems happy to do this in DBAPI2's `execute()` function.
+        """
+        cursor.execute(script)