Fix to allow start with postgres

synapse/storage/__init__.py

@@ -17,7 +17,7 @@ from twisted.internet import defer
 from .appservice import (
     ApplicationServiceStore, ApplicationServiceTransactionStore
 )
-from ._base import Cache
+from ._base import Cache, LoggingTransaction
 from .directory import DirectoryStore
 from .events import EventsStore
 from .presence import PresenceStore, UserPresenceState
@@ -174,7 +174,12 @@ class DataStore(RoomMemberStore, RoomStore,
             prefilled_cache=push_rules_prefill,
         )
 
-        cur = db_conn.cursor()
+        cur = LoggingTransaction(
+            db_conn.cursor(),
+            name="_find_stream_orderings_for_times_txn",
+            database_engine=self.database_engine,
+            after_callbacks=[]
+        )
         self._find_stream_orderings_for_times_txn(cur)
         cur.close()