synapse-product/synapse/storage/schema/event_edges.sql

CREATE TABLE IF NOT EXISTS event_forward_extremities(
    event_id TEXT NOT NULL,
    room_id TEXT NOT NULL,
    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 NOT NULL,
    room_id TEXT NOT NULL,
    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 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);
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 NOT NULL,
    min_depth INTEGER NOT NULL,
    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 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);