Implement new replace_state and changed prev_state

`prev_state` is now a list of previous state ids, similiar to
prev_events. `replace_state` now points to what we think was replaced.

1 files changed, 28 insertions, 12 deletions

diff --git a/synapse/storage/schema/event_edges.sql b/synapse/storage/schema/event_edges.sql
index e5f768c705..51695826a8 100644
--- a/synapse/storage/schema/event_edges.sql
+++ b/synapse/storage/schema/event_edges.sql
@@ -1,7 +1,7 @@
 
 CREATE TABLE IF NOT EXISTS event_forward_extremities(
-    event_id TEXT,
-    room_id TEXT,
+    event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
     CONSTRAINT uniqueness UNIQUE (event_id, room_id) ON CONFLICT REPLACE
 );
 
@@ -10,8 +10,8 @@ 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,
+    event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
     CONSTRAINT uniqueness UNIQUE (event_id, room_id) ON CONFLICT REPLACE
 );
 
@@ -20,10 +20,11 @@ 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)
+    event_id TEXT NOT NULL,
+    prev_event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    is_state INTEGER NOT NULL,
+    CONSTRAINT uniqueness UNIQUE (event_id, prev_event_id, room_id, is_state)
 );
 
 CREATE INDEX IF NOT EXISTS ev_edges_id ON event_edges(event_id);
@@ -31,8 +32,8 @@ 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,
+    room_id TEXT NOT NULL,
+    min_depth INTEGER NOT NULL,
     CONSTRAINT uniqueness UNIQUE (room_id)
 );
 
@@ -40,10 +41,25 @@ 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,
+    event_id TEXT NOT NULL,
+    destination TEXT NOT NULL,
     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);
+
+
+CREATE TABLE IF NOT EXISTS state_forward_extremities(
+    event_id TEXT NOT NULL,
+    room_id TEXT NOT NULL,
+    type TEXT NOT NULL,
+    state_key TEXT NOT NULL,
+    CONSTRAINT uniqueness UNIQUE (event_id, room_id) ON CONFLICT REPLACE
+);
+
+CREATE INDEX IF NOT EXISTS st_extrem_keys ON state_forward_extremities(
+    room_id, type, state_key
+);
+CREATE INDEX IF NOT EXISTS st_extrem_id ON state_forward_extremities(event_id);
+