diff --git a/synapse/storage/schema/event_edges.sql b/synapse/storage/schema/event_edges.sql
new file mode 100644
index 0000000000..6a28314ece
--- /dev/null
+++ b/synapse/storage/schema/event_edges.sql
@@ -0,0 +1,51 @@
+
+CREATE TABLE IF NOT EXISTS event_forward_extremities(
+ event_id TEXT,
+ room_id TEXT,
+ CONSTRAINT uniqueness UNIQUE (event_id, room_id) ON CONFLICT REPLACE
+);
+
+CREATE INDEX IF NOT EXISTS ev_extrem_room ON event_forward_extremities(room_id);
+CREATE INDEX IF NOT EXISTS ev_extrem_id ON event_forward_extremities(event_id);
+--
+
+CREATE TABLE IF NOT EXISTS event_backward_extremities(
+ event_id TEXT,
+ room_id TEXT,
+ CONSTRAINT uniqueness UNIQUE (event_id, room_id) ON CONFLICT REPLACE
+);
+
+CREATE INDEX IF NOT EXISTS ev_b_extrem_room ON event_backward_extremities(room_id);
+CREATE INDEX IF NOT EXISTS ev_b_extrem_id ON event_backward_extremities(event_id);
+--
+
+CREATE TABLE IF NOT EXISTS event_edges(
+ event_id TEXT,
+ prev_event_id TEXT,
+ room_id TEXT,
+ CONSTRAINT uniqueness UNIQUE (event_id, prev_event_id, room_id)
+);
+
+CREATE INDEX IF NOT EXISTS ev_edges_id ON event_edges(event_id);
+CREATE INDEX IF NOT EXISTS ev_edges_prev_id ON event_edges(prev_event_id);
+--
+
+
+CREATE TABLE IF NOT EXISTS room_depth(
+ room_id TEXT,
+ min_depth INTEGER,
+ CONSTRAINT uniqueness UNIQUE (room_id)
+);
+
+CREATE INDEX IF NOT EXISTS room_depth_room ON room_depth(room_id);
+--
+
+create TABLE IF NOT EXISTS event_destinations(
+ event_id TEXT,
+ destination TEXT,
+ delivered_ts INTEGER DEFAULT 0, -- or 0 if not delivered
+ CONSTRAINT uniqueness UNIQUE (event_id, destination) ON CONFLICT REPLACE
+);
+
+CREATE INDEX IF NOT EXISTS event_destinations_id ON event_destinations(event_id);
+--
\ No newline at end of file
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